Summer Inside His Sister Pt. 01
Horny college girl discovers her brother's hard cock.
Ethan didn't think much of it. Why would he? This wasn't the first time he and his sister Katie would be stuck at home for most of the summer holidays. Seasonal work was scarce, as this wasn't a touristy area, so neither of them managed to find jobs to help them pass the time. Not that they had been looking particularly hard. Their mother, being half-Asian and half-Slavic, frowned upon the very idea of teenagers working. In her view, they were supposed to focus on school: learning, passing exams, and getting to a good college. Everything else, she'd sometimes say, was merely a distraction.

To Ethan, it didn't make much sense at all, but he long since decided he wouldn't be the one to argue. Earning extra money wasn't high on his list of priorities, as the living standard of his family has been far from uncomfortable. A large house in an affluent neighborhood, with a expansive backyard and a sizeable swimming pool, wasn't exactly the worst holiday scenery. All of this, and more, was paid largely by his parents' divorce settlement, along with the alimony that his father has been dutifully sending them, every month for many years.

Ethan didn't resent the man. In fact, he didn't know him very well at all, given that the whole kerfuffle happened when he was around five or six years old. The cliche concept of his dad cheating on mom with the secretary had been totally abstract to him then. Now, it was just a distant memory. Since the divorce, Ethan's mom had done almost everything she could to ensure that neither him, nor his sister, would ever feel like the family was missing something -- or someone.

And so, being eighteen now, Ethan shouldn't have much to complain about. But in truth, he had, except his problems were all of personal nature. It would be an understatement to say that Ethan didn't have a lot of success navigating the social minefield of high school. Being quite shy, he didn't have a lot of friends. The few girls he managed to ask out, rather awkwardly, responded with casual dismissal at best and outright mockery at worst.

While he wasn't ugly by any means, and his 5'11" frame gave him some physical advantage, Ethan's biggest problem was the fact that he was thoroughly unremarkable. Other than try to pay attention to what the teachers were saying (with decent success, to be fair), his interests consisted primarily of playing video games and jerking off. As it turns out, this wasn't a winning combination when it came to attracting the opposite sex, so Ethan remained a virgin, with dim prospects for changing that anytime soon.

His summer plans thus revolved mostly around "practicing" those two hobbies. The presence of his sister Katie posed no risk of cramping his style, for he didn't have much of one to begin with. If anything, it was her who could complain about having to hang out with her dumpy brother.

In high school, Katie had been the furthest from a social outcast. It was impossible to be one when you were one of the hottest girls in class, and especially when you paired those good looks with a bubbly, easy-going personality. Topping off at 5'8", with trim and athletically toned body, she enjoyed plenty of attention from guys who wanted to get between her long legs, or place their groping hands on her perky breasts.

Quite a few of them succeeded, actually, because Katie had a rather casual approach to sex and dating. Spiteful girls would call her a slut, but the label didn't really stick to the cute, innocent-looking blonde. Sure, she might have had a new boyfriend every few weeks or so, but she never cheated on any of them, nor had drunken hook-ups at parties like some of her classmates did. Katie's mother instilled in her the importance of academic achievement, so that was always the girl's first priority.

Now, Katie was coming back after her first year in college, older and far more experienced than her brother Ethan. The taste of campus life still fresh in her mind, she was looking forward to several weeks in her quiet little hometown. Between reconnecting with her old friends (of both sexes), her plans included mostly sunbathing and chilling out by the pool.

So, for the first week or thereabouts, Katie has been relaxing under the bright California sun, scrolling through her phone and idly pondering whether to get in touch with some of the guys she used to date.

Today was no different, as she was just about ready to go downstairs and start soaking up the morning rays of sunshine. Already in her small bikini, she realized there was one more thing she needed to bring to enjoy another languid summer day.

"Ethan, did you take my sunscree-- Oh!"

Katie clearly should've knocked, instead of absentmindedly walking into her brother's room without warning. If she did, maybe she wouldn't have seen what she was looking at now, shocked and wide-eyed.

"Katie?!... What the hell?!"

Ethan froze. He was still in bed, although he had pushed the covers and exposed most of his naked body. Laying on his back, he had both hands wrapped around the long, turgid shaft of his impressive erection. Like every day since puberty hit him, he was taking care of his morning wood. The last thing he expected was for his always-sleeping-in sister to barge in at such an early hour without knocking!

"Huh..." she said quietly, a slight smirk curling her lips.

He blinked, realizing Katie hasn't apologized, or scurried away sheepishly. Instead, she was still standing in the doorway, with a rather quizzical expression on her face. A moment later, she giggled, then simply walked in and closed the door behind her.

"Ugh, what the fuck?..." Ethan groaned in confused embarrassment, finally reaching for the sheet to cover his nudity. "Get out! Can't you see I'm --"

"Busy jacking your big cock?" she finished for him with a grin, glancing meaningfully at the prominent flagpole that was now tenting the sheets. "Sorry, bro, I'm afraid I have seen it all! You might as well just keep going..."

Ethan felt like his brain has turned into scrambled eggs. He couldn't quite understand what his sister was even saying to him. "Wha... what?"

"Come on! There's nothing to be ashamed of," she insisted, a tip of her tongue appearing between her lips for a brief moment. "I can see you aren't exactly, you know, finished with this..."

Ethan let out something between a sigh and another embarrassed groan. "I know..."

"So?"

"I can't do it with you standing here!"

"Why not?" Katie asked teasingly. "I'm pretty sure it would only make it easier for you..."

Some of the color on Ethan's face suddenly drained away. "H-how do you mean?"

She stepped closer, crossing her arms under the skimpy bikini top. Her breasts swelled, barely covered by the tiny triangular patches that hid little more than her nipples. "You could have a closer look," she said in a low voice, "instead of just peeping out your window..."

He swallowed, hard. He knew there was no denying it, because he *had* been watching his sister sunbathing for the past week. While it wasn't always her scantily clad body that he thought about when touching his rock-hard dick, Ethan's sister was definitely a recurring star of his frequent stroke fantasies.

"I... I'm..."

She shrugged. "Sorry? Don't be. I'm actually quite flattered," she said with an impish grin. "In fact, I was debating whether I should start working on my tan lines today... You wouldn't tell Mom if I did, would you?"

Ethan's eyes went wide, as he eventually understood what his sister was alluding to. Did she really say she wanted to sunbathe in the nude?

"N-no," he stammered, then took a breath and said more firmly, "Of course not!"

Katie's grin grew even more mischievous. "But you *would* be watching me, right?"

For the first time since she caught him, a faint trace of a smile appeared on Ethan's face as he nodded.

"Mhm..." Katie purred, evidently quite pleased with his answer. "I see... Would you do more than just watch?"

He swallowed again, reflexively glancing at his still-hard cock.

"Oh, of course," Katie understood immediately, then playfully shook her head. "But... really? I'm your sister, you know!"

"But you're hot!" he blurted out, surprised at his own boldness. "Err, I mean..."

"Uh-uh," she stopped him. "I know this is exactly what you meant! You want to jack off while watching your hot sister sunbathe without a swimsuit. Is this how my dorky brother plans to spend his summer?"

Now that she said it, Ethan realized just how pathetic it was. He sighed and hung his head low, averting his gaze from the half-naked figure of his sexy sister. He wasn't even sure if he was busted or not, but at that moment, he didn't really care. Even his morning hard-on, strong and unyielding thus far, began to slowly wilt in shame.

"Please," he croaked. "Can you just... go?"

"I'm not going anywhere, silly," Katie said, now with a kinder but still teasing smile. "Not until I've seen you cum!"--Ethan's eyes bulged out--"What?... If you're going to get yourself off while thinking about me, don't you think I should be allowed to see that?"

Before he mustered any argument against her weird logic, she grabbed the bed sheet and yanked it in one swift motion. Katie's brother was now exposed once again, naked and with a sizeable erection that was quickly growing back to full hardness.

"Mhm..." she purred again, eyeing his rising shaft. "Yes, you *really* have nothing to be ashamed of!"

***

As it turns out, not everything about Ethan was thoroughly unremarkable.

One evident exception, now displayed to his sister in all its throbbing glory, was the decidedly above-average size of his dick. It measured close to ten inches when fully hard, and had a wide girth to match its impressive length. When Katie finally saw it, unobscured by her brother's stroking hands, she couldn't help but to sharply draw air to her nostrils. The worldly girl has seen her fair share of cocks, of course, but this one had them all beat. And to think that it belonged to her awkward younger brother! Her mind immediately started to wander, thinking of the possibilities...

"Uhm... So are you going to just stand here, or...?"

"Oh, right," Katie said, pulled back from her momentary distraction. She skipped forward and sat on the bed, no further than two feet from Ethan and his rock-hard erection. "By all means, bro!" she added, offering him a cheeky grin.

"This is crazy," he muttered, then slowly wrapped his palms around the solid pillar. With some hesitation, the nervous boy finally began to stroke it, using the copious pre-cum he had already leaked over the lengthy shaft. He tried to keep his focus on the task at hand but his gaze kept drifting away, shifting to the sexy spectator who, somehow, had actually coaxed him into jerking off right in front of her!

Ethan's sister, sitting there in her barely-there bikini, watched her brother with intense curiosity. She still had a smirk of her face, but it was slowly fading, replaced by a less playful expression that belied her increasing desire to see his huge cock spurt. Now and again, she would fidget and bite her lip, trying to resist the urge to do something more than simply watch. Feeling more and more frisky, she grabbed her boobs and lifted them, clearly for her brother's benefit, then toyed with the thin strap of fabric that covered her hardened nipple.

Ethan saw it all. He was now openly staring at his wanton sister, gasping in disbelief at the lewd spectacle that she was putting for him without shame. Before long, and totally unprompted, she reached behind her back and untied her bikini top in a flash. Rather than make a big show out of it, she simply threw it away and raised her arms high, letting her horny brother to feast his eyes upon the perfect round globes of her ample bosom.

"Like them?" she asked playfully, squeezing her breasts together and giggling. "Much nicer to see them up close, isn't it?"

"Ahh... yeah," Ethan groaned, pausing for a second when he realized he might be getting close. "They are beautiful, sis..."

"Your sister's breasts," she reminded him, and chuckled. "That's what you are looking at, and jerking off! Damn, this is so naughty..."

For a while, the only sounds in the room were that of Ethan's increasingly frantic strokes, along with the short, rapid breaths of the two practically naked siblings. Katie's own arousal was surging to almost unbearable levels. She was now gasping and moaning, as she pinched and tweaked the hard nubs of her aching nipples. Only the thinnest sliver of inhibitions prevented her from jamming a hand into her soaked bikini bottoms, and sticking several fingers into her practically gushing pussy. This was her brother, after all; she shouldn't be masturbating next to him.

On the other hand, she was his sister, and he obviously *was* getting himself off right here! The fact that it was Katie who goaded him into doing this seemed strangely irrelevant now. She was horny enough to accept any excuse, as the smoldering furnace between her legs could no longer be ignored.

"Ahhh..." her brother then moaned, sensing his impending release. "Sis, I don't think I can hold it much longer... FUUUCK!!!"

With a savage grunt, Ethan exploded, discharging his first shot of hot white cum with an incredible force of his pent-up urges. Surprised, Katie didn't move at all, and she was instantly blasted by a copious amount of her brother's ejaculate. Stunned by its sheer volume, she quickly became an easy target of his next immense salvos.

Ethan was in heaven, groaning in pleasure from his tremendous release. He was watching in shock and excitement, as wad after wad of his own cum landed on the hot, practically naked body of his sexy older sister. He came and came, easily more than a dozen large spurts, before the final volley splattered against his crotch and trickled down the length of his thick, pulsing shaft.

After that, he threw his head back, overwhelmed by the intense experience. He stared at the ceiling, unable to move a muscle, wondering if the sight of his gorgeous sister covered from head to toe in his cum was merely an erotic fantasy...

"Holy shit!"

Or maybe it was not?

"Jesus, bro! Do you always cum so much?" his sister asked, laughing. "Guess it was smart of me to take the top off, right?"

Nope, this wasn't just a figment of Ethan's sex-crazed imagination. His sister Katie was really sitting on his bed, with gobs upon gobs of his thick seed coating most of her nubile body. She looked as if she had spilled a whole quart of milk on herself, and particularly on her shapely boobs that were now dripping with her brother's semen. She even got some of it trailing down her cheeks and forehead, and quite possibly a splash or two that glued together several strands of her hair. Very little of her smooth skin has been spared from the powerful outbursts of her brother's rampant cock.

"Wow, Katie..." he stammered, his brain having trouble to even register this straight-up pornographic view. "I... didn't mean to..."

"To cover your sister in cum? You don't say!" she tried to rib him, but couldn't resist to immediately burst into a fit of giggles. "Geez, Ethan! You really gave me more than I bargained for. Was it all just because I showed you my boobs?"

"Uhm... I... I think it's simply because you were here," he answered sheepishly.

"The real thing is better than your imagination, huh?" Katie teased him, swiping a finger over her glazed cleavage and popping it inside her mouth. "Mmm, your cum tastes pretty good, too!... But wait a minute, I can see that you are still hard. Does it mean you need to jerk off again?"

A deeper blush colored Ethan's already red cheeks. "Yeah, maybe even more than once," he said, gazing at his hot, jizz-covered sister. "I normally do it twice every morning, but after... this... I don't think it's gonna go soft so easily."

Katie stared at him slack-jawed, her mouth catching some stray dollops of cum that were still dribbling down her pretty face. She could scarcely believe her ears! Could it be true? Was her total goof of a brother actually an absolute stallion in disguise? She saw his huge cock, she saw him come literal buckets all over her naked body, she could see him stay rock-hard even after this epic orgasm, and now he's claiming he'd be good for two, maybe even three more rounds?!

It sounded almost too good to be true. Her pussy was practically on fire; the week-long abstinence from sex was really starting to take its toll on the highly libidinous girl. She needed a good fuck, and she was almost desperate enough to try ringing up some of her ex-boyfriends. But what if she didn't need to? What if the solution to her woes had been right here, all this time?...

"Ethan, I need to ask you something," she started, suddenly getting quite serious, "but please, think carefully before you decide to answer..."

Intrigued, if a little worried, he got up and sit next to her. "What is it, Katie?"

She took a deep breath, then closed her eyes and said, "How would you like it to have sex with your sister?"

***

True to his promise, Ethan's cock didn't even begin to go down. Given the prospect of potentially getting inside the steamy hot pussy of his older sister, it could probably stay hard like that forever. But Katie wasn't looking for a one-and-done deal. If she were to commit incest -- a morally iffy endeavor, regardless of how willing you were -- she had to be sure that her brother would be in for the long haul.

"I don't care that you're a virgin," she stated right away, much to her brother's chagrin. "What? You thought I wouldn't figure it out?... Please! It's painfully obvious that this is the first time you are naked with a girl. But don't worry, bro," she said with an encouraging grin. "because if we do this, then I can guarantee you will get a *lot* of practice!"

He swallowed, watching his topless sister use a towel to wipe the last bits of his cum from her body. He still wasn't certain that all of this wasn't simply some wet dream. Was he really talking to his hot sister about the two of them having sex all throughout summer?

"Yes," he said, agreeing for the umpteenth time. "Yes, dammit! Where do I sign up?"

She rolled her eyes. "Did you even listen to me, you doofus? I said that I can probably take even a dork like you, and turn him into someone who knows his way around the bedroom. What I don't want is for this whole effort to go to waste," she said resolutely. "If we fuck, and you'll get all cocky and confident, and you get yourself a 'real' girlfriend, then I don't want to be left out because you are suddenly in love, and you can no longer have sex with your sister! Do you understand that?"

"Wow, sis," Ethan let out, instinctively stroking his persistent erection. "You sure don't beat around the bush!"

"I don't," she agreed with a sigh, eyeing his massive hard-on. "Why should I? We both need the same thing. I just need you to promise that once you start fucking me, we will keep doing it until the end of summer."

"I pro--"

"No," Katie interrupted him. "Think with your other head for a minute, okay? This is incest we are talking about. Even my friends back in college, who are into some kinkiest shit you can imagine, would probably agree it's a little weird to have sex with your own brother," she said, then added in a low voice. "But I think it's actually pretty damn hot..."

Ethan wanted to immediately agree, then remembered he was supposed to consider the issue more carefully.

In truth, however, there was nothing here for him to think about. His incredibly sexy older sister, whose gorgeous nubile body he had jacked off to numerous times, was offering to become his fuck-buddy for the whole summer! Rather than beat his hard meat on his own, Ethan could be sticking it inside what he imagined was some very hot, very tight pussy that would fit perfectly around his throbbing erection. So what that it belonged to his sister Katie? As far as Ethan was concerned, she was a hot chick first and foremost, and evidently a horny one, too!
"I want to fuck you, Katie," he said with utmost sincerity. "I don't care if people say it's wrong. You are the sexiest girl I know, and I would love it more than anything in the whole world!"

Katie's face lit up with a beautiful smile, and she quickly turned it into a sultry and seductive grin. "Yes, I can see that", she said, looking at Ethan's pulsing erection. "You have a beautiful cock, my not-so-little brother"--Ethan's dick twitched at the compliment--"and I can't wait to feel it stretch me from the inside, and fill my pussy with your forbidden cum," she moaned, tweaking her hard nipple as she rubbed her legs together. "But you should know that I can quickly become very demanding... Are you sure you'll be able to keep up with me? How often can this thing get hard?"

"Well..." Ethan hesitated, still a bit embarrassed to open up about his masturbatory habits. "Since you arrived, it's been like... a lot. And I have to jack off more than usual, too."

"Because you've been watching me, you perv!" she seemingly scolded him, except her smile was cheeky and radiant. "Good! How often?"

"Uhm, twice in the morning, like I said... Then probably around lunch, 'cause you'd be outside by the pool," he said timidly. "I guess once more before Mom comes home from work. By then, I'm usually fed up with losing in Fortnite so, ugh, I have to relax I suppose... After dinner I'd usually do it, too, especially if it's a raid night. This way, I can focus on my DPS rotation and not on, uhm, you know..."

"Fantasizing about your hot sister?" Katie teased him, playfully wagging her finger. "Tsk, tsk! I'm disappointed, Ethan. You should be thinking about *me*, not your stupid games!"

His blush deepened, and he had to clear his throat before continuing. "Yeah, so that's actually what I do before I fall asleep, when I jack off one last time..."

"Okay," said Ethan's sister, glancing sideways as she did some math in her head. "So that's gonna be... Fucking hell! Six? Seven times a day?!"

"Huh, I guess it might be this much," Ethan mused, briefly looking down at his (still!) rigid erection. "Like I said, it's been a lot since --"

"Shut up!" Katie suddenly yelled, taking a deep breath while Ethan held his. "Just stop talking, and let me think," she said, then muttered something and let out a long sigh. "Okay, dear brother, here's what's going to happen. From now on, you are NOT allowed to jerk off! Not to relax, not to 'help you focus', not for whatever lame reason you can come up with... Instead, this cock"--she actually grabbed it, for the first time, and Ethan's eyes practically bulged out!--"is going inside ME!... Any time you feel like it, any time *I* feel like it, you are going to put it inside my dripping cunt, and you're going to fuck me until neither of us can move anymore!"

Katie's eyes shone with pure, unbridled lust, and Ethan was in equal parts mesmerized and terrified. Seeing his trepidation, she allowed herself a hearty chuckle, and gave his rock-hard cock an encouraging squeeze. "Aww, don't be scared, little brother! You are going to love it. Your big sister"--she scooted up to him and whispered in his ear--"is going to take a very good care of you..."

Ethan swallowed. There was a moment when he thought she was going to kiss him, but she only licked her lips and giggled seductively. He felt her hand press against his chest, pushing him back on the bed. He lay down, rock-hard cock sticking up like a flagpole, while his sister looked at him with a smirk and a wicked gleam in her eye. It took her less than a second to finally get rid of the sodden bikini panties, exposing her smooth, hairless pussy to the hungry stare of her still disbelieving brother.

"Do you like it?" she purred, pushing apart the glistening labia. "I always keep it clean and bare, so I can wear those tiny bikinis. You know, the ones that you seem to like so much!" she added with chuckle. "So, what do you think? Do you want this to be your first pussy?"

"God, yes!" Ethan croaked, his gaze fixed on the shaven mound. "It's beautiful, sis..."

With a sultry moan, Katie climbed on the bed and straddled her brother's lap. Mere inches from the tip of his swollen cock, her steamy hot pussy was already embracing the massive shaft with gentle, warm breeze that radiated from the sopping wet furnace. Biting her lip, Katie steadied the twitching pole with her hand and slowly lowered herself upon the meaty pillar.

"Oooooooooooh!..."

They both moaned, when the large head of Ethan's sizeable rod split the pink lips of his sister's young, yet experienced pussy. As it entered further, going all the way to her cervix, Katie was starting to realize that this might be the best cock she'd had in her whole life. Never before she had felt so full, so complete... Her very own brother was the biggest stud that has ever entered her discerning cunt, and the only thing she regretted about committing incest with him was the fact that she hasn't done it sooner!

"Ahhhhh..." she moaned again. "It's so big!... Gimme... just a moment..."

Ethan was in no position to argue. As far as he knew, he has just died and gone to heaven. The sensation of his sister's pussy, tightly hugging his throbbing hard-on, was lighting up neurons in his teenage brain that he didn't even know he had. No amount of lube, no practiced stroke or tug, no touch of his own hand or fingers could compare to the mind-blowing experience of feeling the gently quivering walls of his sister's love canal.

For a moment, he thought he'd blow it right then and there, but Katie thankfully stopped moving when she sheathed him completely. It allowed Ethan to adjust, if only just a little, to this awesome new reality.

He was no longer a virgin -- and that's because his hard cock was now inside the heavenly pussy of his hot, older sister!

"Still with me?" she asked playfully, giving her brother a wink. "A little overwhelmed, huh?... That's okay. No, really"--she placed both hands on her lover's chest-- "it's fiiiiiiiine..."--she started to gyrate--"totally... ooh!... totally fine..."

Though very slow at first, Katie was really starting to fuck her brother now. Her breath was getting ragged, intertwined with lustful gasps and moans as she worked every angle of Ethan's massive hard-on. She didn't even have to do all that much, for the sheer size of his tremendous pillar guaranteed it would easily hit all the sensitive spots inside her tightly packed pussy. A small bounce here, a little sway there, some gentle rocking back and forth, and she was already almost breathless. Her brother's cock was driving her wild! She knew she'd need it in her a lot from now on, and she was hoping that Ethan would happily oblige.

And how could he not? The boy was in seventh heaven right now. The marvelously tight pussy of his feisty sister was gripping his stiff cock in all sorts of wonderful ways, sending pure pleasure straight up his tingling spine. It was all too much for him, really, especially with Katie's nude, erotically sleek body writhing on top of him. He didn't dare to touch her anywhere above her firm thighs, afraid he might already explode inside her wet box if his hands wandered any further. He desperately wanted for this moment to last for a long time, because it was clearly just a dream that he'd soon regret waking up from...

"Ooooh..." Katie moaned, leaning back and pressing down onto Ethan's rigid manhood. "I can't believe... that my brother is so huge!... Oh god, I'm almost there... Yes... Oh yes!... Fuck! I'm coming bro! YOUR SISTER IS CUMMING ON YOUR BIG COCK!!!"

Her whole body trembled from the intensity of her massive orgasm. A guttural moan forced itself out of her throat, followed by many more strained groans as the crashing waves of her climax shook the young girl to the very core. Katie's overstuffed pussy convulsed in numerous spasms, clenching down on her brother's thick meatpole. For the excited boy, this was the final straw; he could last not a second longer.

"Oh... god... me too, sis!" Ethan roared, feeling his balls lurch right before the inevitable eruption. "I'm... cumming.... aaaah!... I'm cumming... inside you..."

"YES! Cum with me, Ethan! Fill your sister's pussy with everything you've got!"

Blast after blast, he pumped his voluminous load deep into his sister's vagina. With every grunt, he flooded her pussy with a new deluge of his potent seed; a liquid proof of their lurid, incestuous union. Their simultaneous orgasms, more powerful than anything either of them has experienced, lasted for almost a minute. Though it has been the first time only for Ethan, in truth even Katie couldn't compare it to anything she had felt before. She wailed, and thrashed, and screamed her throat hoarse in ecstasy, before finally collapsing on top of half-conscious Ethan. It was nothing but pure sexual bliss, and she only experienced it because of her own brother!

Neither of the exhausted, sweaty siblings has moved or said anything for several long minutes. Eventually, Katie chanced to slowly revive her arms and try to push against the mattress, groaning as she propped herself back to a sitting position. As her taut butt landed on her brother's lap once again, the tired yet contented smile on her face turned into a cheeky grin. She wiggled a little, just to be absolutely sure, but there was really no doubt about it.

Even after this monstrous orgasm, which practically knocked out both of them for a good while, Ethan's dick remained firmly lodged inside the cum-filled pussy of his sister. She quickly realized, to her immense delight, one other thing about her brother's magnificent cock. Despite this very recent and very impressive discharge, it was still rock-hard!

***

Katie wasted no time taking advantage of her fortuitous discovery. Once Ethan came to his senses -- and realized that yes, he was in fact fucking his beautiful sister -- she rolled them over and lay on her back. It didn't quite work at first, for he clumsily fell on top of her, making her giggle at his obvious inexperience. She didn't mind; in fact, she found it rather adorable, especially in contrast with how well-endowed and virile her brother was. She felt honored to be the one to introduce the novice stud to the wonderful world of sex, and also lucky that, at least for the time being, she'd have him all to herself!

"Fuck me, brother," she moaned, her hands kneading his firm ass. "Push that huge cock deep into your sister's wet pussy!"

Awkward and nervous though he was, Katie's brother was still a horny, red-blooded teenage guy. He didn't need more encouragement. The combination of his raging hormones, primal instincts, hours of porn he had watched, and his sister's gentle guidance was more than enough to get him going. So, after a moment of hesitation, he started thrusting into Katie's sopping wet gash, reaching deep inside her, spilling much of the cum he's already pumped into his horny sister. It was dirty, it was messy -- and it was, without a doubt, amazing.

"Harder, Ethan! Really give it to me now!... Ooooh! Yes! Fuck me good!"

With every thrust, the shy and awkward boy was gaining more and more confidence. How could he not? Writhing beneath him was his sexy older sister, gasping in pleasure that his cock has been giving her, already well on her way to a shuddering orgasm. Only a few hours ago, he would never have believed he'd have sex with a woman whom he had fantasized about so much... A hot, taboo, forbidden sex with his absolute knockout of a sister!

It wasn't long before Ethan was fucking her as hard as he could, slamming the headboard against the wall just as he slammed into her gushing pussy. In the heat of the moment, their lips locked passionately, their hungry kiss an expression of pure, unbridled lust. Lasting but a few moments, it ended when the raw intensity Katie's orgasm took her breath away, and left her gasping in ecstasy while her brother continued to fuck her all throughout this powerful climax.

It soon turned into a blur of continuous orgasms for her, one coming right after another, until the eager stud spurted himself once again, flooding his sister's thoroughly fucked orifice with many more ounces of dense, teenage cum.

His strength sapped, Ethan rolled over and lay on his back, panting heavily from the exertions of this wild, incestuous tryst. Next to him, Katie was lying in a blissful afterglow, her racing heart rate finally beginning to slow down. She could scarcely believe how good it had felt to fuck her own brother. Any feelings of guilt, if they even had time to enter her mind, were wiped hundred percent clean by the sheer ecstasy of their lurid coupling. Her slightly sore pussy, currently leaking copious amounts of Ethan's cum and her juices, tingled pleasantly, as it reluctantly contracted in the absence of his thick shaft.

She was content, though not quite satisfied. Katie's appetite for sex seemed to be growing at a rapid pace, just from her close proximity to the young stallion.

"So, how's that for your first time, bro?" She rose and leaned over him, smiling. "Having fun so far?"

Ethan exhaled in a long, drawn-out sigh, followed by an amused chuckle. "Yea... It was incredible! I can't believe we actually did it."

"Nuh-uh," said Katie, casting a longing glance at her brother's dick. "We aren't really done here now, are we?..."

Indeed, they didn't seem to be. Slick with their combined fluids, Ethan's cock has softened only slightly. With a small effort, it could easily be revived for another, even longer round of lovemaking. But Ethan wasn't sure he was really up for it just yet. As his rather scrawny physique would indicate, he was wholly unaccustomed to physical activity; the effort of fucking his sister has actually left him a bit winded. In his head, he cursed himself for steadfastly avoiding the gym, worried that his lack of endurance might dampen Katie's enthusiasm in the future.

"You're tired, huh?" she guessed on her own. "Well, that's a bit of a bummer. But!... All the more reason to make this into your daily workout!"

He blinked. "So you want to --"

"Do it again? Hah! You're kidding, right?" she said with a girlish giggle. "Bro, I've never cum so hard in my life! Your dick is really something else... Gosh, I wish I knew it sooner! Why didn't you tell me?!"

"Ugh, how exactly would I --"

"I'm kidding! Good to know that even as not-a-virgin, you are still my dorky little brother," she said endearingly. "Anyway, if you need a breather then I think it's time to clean up. Come on!"

Before Ethan could respond, Katie jumped out his bed, laughing as she held a hand against her leaking pussy. Winking at him sultrily, she scurried towards the bathroom, her brother eventually trailing behind. Watching his totally naked sister walk around the house like that, Ethan once again thought that all of this might just be a surreal, yet very sexy dream. This time, however, he simply chuckled as he dismissed the idea out of hand.

"Get in!" Katie called to him from the shower. "The water is nice."

The cabin was quite spacious, so he had no problems squeezing in. He gasped as he did so, seeing his sister unceremoniously wash her pussy with her fingers. Grinning, she passed him the shower gel and told him to soap her up, then made her intentions crystal clear by grabbing his hands and placing them on her perky butt.

Ethan's cock, which never went completely soft, started to harden rapidly as his sister rubbed her sleek body against his. Purring seductively, she took the stiffening rod into her hands and massaged it back to full readiness, just mere minutes after her potent brother came for the third time!

"Mmm, very nice," she moaned, enjoying his excited hands touching and exploring every inch of her wet skin. "You are eager to get to know your sister's body... Hmm, maybe I should let you get more familiar with what a naked girl looks like? Would you like that?"

"Huh... What do you mean, sis?"

"I could just go nude... Actually, I think we should both just stay naked from now on," she said, looking up at him with a wicked grin. "This way I can always tell when my cute little brother is getting hard for me! Too bad he is not allowed to jerk off anymore..."

Ethan gasped. "No way! I would have a permanent boner!"

"I fail to see the problem," Katie said mischievously. "Remember what I told you before? Any time, dear brother... I'm pretty sure I'll never get enough of your big, hard cock!"

He gasped again, now that the full implications started to dawn on the horny boy. "Are... are you serious?"

She treated him to a beautiful sight of her cheeky smile. "Completely serious, Ethan. Whenever you want it..." she trailed off, allowing his imagination to run wild. "My body is yours to take, brother. Always. Touch me, kiss me, feel me up, or fill me with your cum... Anything you want! Just remember that it goes both ways. Don't expect me to bugger off because you want to play your dumb video games. When your sister wants cock, it is your duty as a brother to oblige!"

Ethan couldn't believe his ears. It was really a dream come true for the sex-starved teenager. His cock responded accordingly, twitching in his sister's hand. She continued to stroke it, every now and again, while soaping up the rest of her brother's body.

"Games? You're kidding, sis," he said with a laugh. "Why would I care about any of that when I've got *you*?"

"Mmm, that's what I want to hear... But seriously, Ethan: if we go with this, then we'll be fucking pretty much all the time. That's a big step for someone who has just lost his virginity!"

"I'm ready!" Ethan said without hesitation. "I never want to stop fucking you, sis... But wait! What about Mom?"

"What? You want to fuck her, too?"

That was a totally out-of-the-blue question from Katie, but it sure has thrown Ethan off for a moment. "Wait, what?!... No, I mean... What should we do when she's not at work?"

Katie paused her stroking, lost in thought for a moment. "I don't know... Do you think we should keep it a secret?"

He blinked. "...Is there some other option?"

"Well, maybe there is," Katie said cryptically, which put a terrified expression on Ethan's face. "Okay, look: I know Mom can be a pain in the ass sometimes, but she's very--how do I put it?...--practical. You know why she never gave me any shit about my boyfriends? I could bring a guy home any time I wanted..."

He remembered that. Most nights that she spent at home, Ethan's sister would sleep with whatever guy she was currently dating. The sounds coming from her bedroom were a major fuel to his fantasies, and another reason why Katie starred in them so prominently. He had been jealous of her, often wondering what it would feel like if it were him, making his sister moan in pleasure... The memory was making him somewhat uncomfortable.

"Hey! Don't even think about it!" Katie chided him as she sensed his unease; Ethan's cock became just a touch softer in her hand. "Yes, your sister has been getting around. So what? I like sex. I bet you've noticed that already!" she said with a chuckle. "Anyway, what I'm saying is that Mom knew about my antics and was fine with it. All I had to do was to keep my grades up, and stay out of trouble."

"Yeah, it's the grades part that I always had problems with," Ethan said with a sigh, remembering how his mother didn't like him getting the occasional C+. "Thank god it's summer already!"

"Yup! And what better way for us to avoid trouble than to stay home and have sex with each other?" Katie asked rhetorically, her nose twitching as she almost snorted a laugh. "Seriously though, I've got a sense that Mom would be cool with it."

"Uhm, sure... So, uh, how exactly do you want to handle this?"

Katie just shrugged. "No idea. Didn't think that far," she admitted, then looked down at her brother's renewed erection. "Well, well, if isn't my stud being hard and ready again! Let's finish up here, before we turn into prunes, then go back to bed?"
Ethan has momentarily forgotten their dilemma about Mom. What Katie just said was nothing but music to his ears!

***

The second part of their all-out fuckfest was, unbelievably, even longer and more intense than the first.

They changed the soiled sheets on Ethan's bed in *extreme* hurry, then Katie immediately got on all fours and moaned for her brother to fuck her from behind. He did, naturally, and they rutted like crazy, until Ethan once again came buckets inside his sister's insatiable pussy. He needed another timeout after that, purely to catch his breath, but his athletic lover would not relent so easily. Straddling her brother, the horny girl impaled herself upon his somewhat faltering hard-on, then rode him in reverse while Ethan only watched her firm ass bounce up and down on his lap.

Right then, he made a solemn oath: should he survive the wringer his sister was putting him through, he'd start making daily use of his family's basement gym!

When Ethan finally came, after countless times Katie managed to get off on his huge cock, the tireless vixen got up and knelt between his legs. Licking her lips, she bent down and swallowed most of her brother's semi-hard dick, moaning lustfully as she tasted the heady mixture of his cum and her own pussy.

She had planned to clean him up, and perhaps finish him off with a slow blowjob, but Ethan shocked her once again. Though the load of semen that he shot in his sister's mouth was noticeably smaller than his previous explosions, it was still much more than she expected. More importantly, his dick didn't soften much while she was vacuuming the last drops of his tasty seed that lingered in the wide sperm duct. Surprising even himself, Ethan eventually got fully hard from Katie's ceaseless ministrations, at which point she took his shaft out of her mouth and examined it with her fingers.

"Fucking hell," she said in disbelief. "Where have you been all my life?!"

He chuckled. "All your life? Sis, you are nineteen! And I was right across the hall."

"Figure of speech, dummy," she retorted with a toothy grin. "Point is, you and your dick are actually starting to wear me out. From what I remember, I've been doing most of the work, while you just lay back and... and stay hard! Somehow!"

By this point, Ethan could read his sister well enough to know this wasn't a real complaint. "I guess I'm... sorry?" he said with a grin.

"Awesome," Katie said sarcastically, letting go of his cock and stretching her sleek, toned arms. "Well, bro, I'm afraid you're gonna have to hold out for later. I'm more hungry than I'm horny, and I say that it is about time we made some lunch. Any objections?"

Ethan had none. In fact, Ethan would never object to anything his sister suggested ever again. Today was the best day in his entire life, and it was all thanks to her. To think that it was just the beginning -- that he could expect an encore every single day, as he and Katie were to fuck the summer away like rabbits -- was just mind-blowing to him. There was no way life could get any better than this!

"I'll make us some sandwiches," Katie said, casually sauntering away in her birthday suit. "Come down in a few minutes, alright? And remember..."

"What?"

She smiled seductively. "We stay like this"--she pointed at her nakedness--"whenever Mom isn't home!"

Leaving her brother with a big smile on his face (and another set of dirty bed sheets to deal with), Katie walked downstairs and made her way to the kitchen. She threw some bread in the toaster, then scoured the fridge and found some cheese, sliced meat, and other suitable ingredients. She was humming cheerfully as she started to layer them up, feeling a very satisfying ache between her legs.

Yes, today was simply terrific! Who could've thought that her nerdy brother was packing so much heat? And holy shit, does it ever go down?! Apparently not, Katie thought as she giggled to herself. She was already making plans to further take advantage of Ethan's extraordinary stamina, ideally in a way that could advance his sexual education. How well could he eat pussy, she wondered? Maybe she could work on some of those tan lines after all, sunning her naked body while he ate her out, bringing her to one screaming orgasm after another...

"Oh, there you are. I couldn't find you by the pool, and I didn't want to hear Ethan complain again how I'm interrupting his -- Uhm, Katie... Where are your clothes?"

A knife fell to the floor with a clank.

"MOM!!! You're not at work?!"

She shrugged. "I came home early. My team's getting better at not arguing every minute detail during sprint planning, so we finished an hour earlier," she explained. "I'll catch up on some work in the evening... But what about you? I can see you are having a boy over"--she pointed at her daughter's breasts, which she self-consciously covered with her hand--"Cute. Try not to parade like that before Ethan, okay? Your brother's got enough hormones in his system already... Do I know him, by the way? I mean the boy that you are, well, you know..."

Katie barely moved, thinking desperately how to signal Ethan to stay in his room. Her iPhone was still in her beach bag, untouched since she walked in on her brother and dropped it by his bed. The family iPad was nowhere in sight, and it was unlikely her brother would make his phone buzz on every email anyway. Her best option was to run back upstairs right now, but she couldn't think of a good excuse why she'd suddenly need to do so.

"Uhm, yeah," she stammered. "I think you would remember him..."

"Oh, I'm sorry, I guess that's not really a business of mine," her mom said with a smirk. "Either way, he's very lucky to have you, Katie. Make sure he treats you right, even if it's only sex."

"H-he is, Mom," Katie stuttered again, only now reaching down to pick up the knife she had dropped. "I wouldn't be making him sandwiches if he wasn't!"

"Right," her mom said with a chuckle. "Especially these days, men appreciate when you don't shy away from the kitchen. Sometimes it's even more important than the bedroom!"

"Mooooom!"

"Oh, shush! I know you had no problems attracting quite a few, ahem, suitors, but that doesn't mean you can rest on your laurels. What matters is to attract the *right* guy for yourself!"

Katie just sighed, choosing not to comment on what her mother thought was timeless wisdom. She focused on chopping the olives and praying that her brother somehow takes an hour changing the sheets, rather than doing it as quickly as possible so he can come down and ogle his naked sister.

The latter was, obviously, what Ethan has actually done.

"All sheets in the hamper, sis! I threw in your bikini, too. You forgot to pick it up, you know? Mom would get suspicious if she found it on the floor in myyyyyy-y-y-y..."

He noticed her then.

"Ethan? Did you too forget your -- oh..."

The siblings looked at each other, stunned.
Summer Inside His Sister Pt. 02
What about Mom?
Neither of them dared to breathe, let alone move. Both Ethan and Katie remained frozen, looking at each other, trepidation painted clearly on their young faces. Neither of them dared so much as a glance at their mother, who was staring at her son with a quizzical expression. Several long, heavy seconds have passed before any sound disturbed the eerie silence.

"Well! I'm sure there is a perfectly valid explanation why my kids are walking around naked, and..."

The mother's voice faltered, and she bit her lip as she felt a bunch of confused emotions flow through her, one after another.

"Uhm, we were just... I mean..."

"Stop it, Ethan," his sister said soberly. "We aren't going to pretend this isn't exactly what it looks like... Mom? Ethan and I are having sex."

Mom's lips quivered. She looked at both her children, and saw that there was not a stitch of clothing between them. It was completely surreal.

"How long?..."

"Just today," Katie jumped to answer. "It... sort of happened."

And then it happened again, and again, and again... That's what she thought in her head, but of course Katie was smart enough not to say it out loud.

The situation was awkward enough already, with both her and Ethan standing in the living room and kitchen, naked, and still very much covered in liquid evidence of their recent coupling. Katie was strategically hidden behind the counters, so a hand on her breasts was enough to stop her from flaunting her intimate parts. But Ethan was right there in the open, and clearly too shocked to even think about covering his sizeable dick. The monstrous thing was still at half-mast, and Katie had a hard time trying not to stare at its stubborn tumescence.

"It happened," her mother repeated blandly. "Just like that?"

"I... I walked on him masturbating," she said, deciding that in these circumstances, the fact that her brother was jacking off wasn't exactly shocking news anymore, "and I, uhm, dared him to finish with me watching..."

Katie's mother raised an eyebrow, but otherwise didn't do much to acknowledge her daughter's explanation. "Ethan? What do you have to say?"

"I, uhm, well... I don't have anything to add. Mom," he tried to weasel out. "Katie's telling the truth!"

To everyone's surprise, Mom let out a hearty chuckle. "So! My son is finally admitting that it is not 'yogurt' that I would sometimes find dried up on his desk," she said in obvious amusement. "All it took was me discovering that he's been having sex with his sister! Lovely. Anything else you kids want to share?"

The siblings exchanged confused looks, unsure what else to say. They still had no idea what their mom thought about this, the two of them engaging in incest. She hasn't yelled at them at least, or told them to move out, so perhaps all wasn't lost yet?... Come what may, Katie figured that she and Ethan should at least present their case.

"Mom, look... We are just having some fun. I'm not gonna fall in love with Ethan -- more than I already love him, that is -- or marry him, or heaven forbid have his babies!" Katie shuddered at the very thought. "We were just bored, and horny. I'm on the pill, and Ethan... uhm... hasn't done it before, so nothing's bad gonna happen, Mom."

Katie's mom shook her head, crossing hands under her breasts, "Honey, this is called incest. Regardless of what I think about it, the law says it should be illegal."

"No one has to know, Mom," Ethan chimed in, finally having the presence of mind to cover his exposed crotch. "Like Katie said, we aren't dating or anything... We are still just brother and sister."

"...who also happen to sleep with each other, eh?" his mom said, and scoffed lightly. "Isn't that wrong?"

"We don't care --" they both started, then realized they were speaking simultaneously. "We don't care what people think, Mom," Katie continued, smiling at Ethan who was evidently of the same mind. "We aren't hurting anyone, and we have nothing to be ashamed of. I wish you could see it this way, too..."

For the first time, their mom smiled. "I understand that, Katie. I can't say that I'm very enthusiastic about you engaging in this sort of thing, but you should do whatever makes you happy. Honestly..." she started, then dropped the thought. "Nah, never mind."

"What, Mom?" Katie insisted. "We want to know what you think..."

Mom's smile turned into more of a smirk. "Well, if you insist... I was gonna say that I am not _entirely_ surprised that this happened. For one, Ethan has been looking at you like a snack from the very moment you stepped into the house."

"Mom!" The boy cried in embarrassment. "...You noticed?"

She rolled her eyes. "I am not as oblivious as you think I am, young man. Your sister is a gorgeous woman, but that was more than brotherly appreciation of her beauty. Sometimes, you were just blatantly staring, you know..."

Ethan gasped, blushing as he hung his head in shame; Katie couldn't help but let out a girlish giggle.

"And you, young 'lady'," her mom turned to her, and actually used air quotes to emphasize her point, "you are even more boy-crazy than I thought! Your own brother? Really?"

It was now Katie whose face went beet-red. She fidgeted in place, staring at the cutting board with condiments for the still-unfinished sandwiches she'd been making.

"In all honesty, though," her mom spoke again, her voice lower and a bit quieter, "I think it might actually be good for the boy. At least he won't be jerking off so much."

"MOM!!!"

She laughed. "What? Have I said anything that is not true?"

Feeling very seen, Ethan used a second hand to cover his chubby penis, then skipped behind the counter next to Katie. His sister smiled at her lover, realizing, to her astonishment, that even in this tense situation her pussy tingled from the mere presence of her studly brother. She would love for him to just bend her over the counter and fuck her right then and there, but that was obviously not an option at the moment.

"Well..." Katie decided to risk a more explicit admission. "If that's not saying too much, I'm kinda trying to teach him stuff as we go along... Sex stuff, I mean. He's been a very fast learner so far!"

"Oh, was he now?" said her amused mom. "Looks like you found the one topic, other than video games, that actually interests him!"

"Oh my god! YOU TWO!" Ethan cried in exasperation, which only made both of them laugh. The tension was definitely abating, and Katie was starting to think that maybe her summer plans weren't completely ruined after all. Mom seemed cool enough with the two of them fucking, and it looked like it shouldn't be much of a problem if they continued... Question was, could it mean she would tolerate them doing it even when she was at home?

"Mom, speaking of Ethan's, ahem, education," Katie chanced. "I made him a promise... He was to have an unrestricted access to my body, whenever he wanted me. I'd stay nude at all times, to get him more accustomed to what a naked girl looks like. He was supposed to stay naked, too. Now I'm wondering if this is still on the table..."

Mom's eyes went wide. "You kids want to be nudists now?"

"Uhm, yeah... Although not quite. This would definitely be *sexual* nudity, Mom. That's the whole point!"

"Huh..." Her mother pondered this for a moment, glancing at her already nude children. "I don't mind you going around the house like this, though you better put some towels when you sit somewhere," she said with a chuckle. "But you're saying you also want to have sex wherever the feeling strikes you, and I just don't know about that... What if I'm in the room, too?"

What the hell? Katie was astonished that Mom didn't simply shoot her down instantly! Her objections were completely reasonable, of course, but Katie was now too excited about the idea of complete sexual freedom, for her and her brother, to let go of it so easily.

"Would it bother you, Mom?"

"To see my children fuck?" she said the naughty word so casually. "That's not a question a mother is supposed to think about, Katie..."

"Okay, that's fair. How about you just tell us to get lost if we get too distracting?"

Katie feared that she had definitely crossed the line, but her mother just laughed. "Right, maybe I'll tell you lovebirds to go get a room," she said in jest, "and as long as it works, then perhaps..." she trailed off, thinking about it some more. A few long seconds passed until she sighed and finally said, "Okay, I can't believe I'm actually agreeing to this, but if that's how you kids want to, uh, explore your sexuality, then go off I guess!"

"No way!" Ethan jumped in. "You are the best mom ever!"

"The absolute best!" Katie agreed. "In the whole world!"

"Alright, alright! Let's see if I don't regret it," she said with a weak smile, and sighed again. "Now, since you dropped this absolute bombshell on me today, I think it's only fair that you kids should take care of dinner. I'll be in my office if you need me."

With that, she left the sibling couple and walked away. Just before she's gone out of sight, she turned around and said with a cheeky grin, "Just make sure you wipe the counters when you're done."

***

A minute after their mom left, Ethan and Katie were still in a state of shock. They stared at the distance, uncertain what to make of everything that happened just now. Katie in particular couldn't believe that her conceit actually worked. She and her brother now had a free pass to fuck each other to their heart's content!

"You were right, sis," Ethan said, not actually looking at Katie. "Mom is just really, really cool."

His sister giggled. "I know! Honestly, though, this went way better than I expected, like, by far," she admitted, her eyes soon wandering down to her brother's prominent crotch. "Aww, you softened a little... Want me to fix that?"

"Wow, Katie! Are you always this horny?"

"I said I can be very demanding," she purred, "but I think it's mostly your fault, brother. Your cock is all I can think about now!"

He teased her, "So that's why I didn't get my sandwich."

"Shit, you're right," Katie agreed, restraining her impulses. "We really need to fix some dinner. The last thing we want now is for Mom to have second thoughts about all this!"

With her brother to help her around the kitchen, along with her laptop to look up a suitable recipe on the internet, Katie managed to parlay the unfinished sandwiches into a decent-looking bread lasagna. Less than half an hour later, it was already simmering in the oven, allowing them enough time to turn their attention back to other matters...

"Fuck me harder, Ethan! Oh god... Yes, deeper! I wanna feel... every inch..."

Bracing against the counter, Katie was pushing her hips against her brother, eagerly meeting his rapid advances into her sopping wet snatch. Ethan was railing her from behind, driving his hard cock deep into his sister's tight pussy, heavy balls slapping against her sleek thighs. He grunted with each thrust; his muscles were sore from all the physical effort, but he was determined to give his sister the pounding that she clearly loved.

This was the first time they were fucking outside of Ethan's bedroom. It excited him to no end, to have sex with his hot sister, anywhere they liked and at the drop of a hat! It was intoxicating to think that Katie was now his to take on a whim, just like she could jump on his cock whenever he least expected it.

Both siblings knew they'd be (ab)using this privilege a lot in the coming days and weeks. And it was all thanks to their incredibly cool mom, who not only accepted their incestuous relations, but also allowed the horny teenagers to have sex all over the house!

"Uggggh!... I'm coming, Katie! Your brother's cumming in your pussy!"

She moaned throatily, feeling Ethan's massive cock unload in her vaginal hole for yet another time today. It filled her completely, again, and before long there were trails of cum leaking down her inner thighs. Mindful of the possible mess, she reached for a paper towel and tried to wipe herself clean, only for more of her brother's semen to trickle down from her flooded young pussy. Laughing at her predicament, she excused herself to the bathroom, leaving Ethan to take their baked dish out of the oven.

"Smells delicious," he heard his mother's voice, and he turned around to see her smiling. "What is it?"

"Some kind of lasagna, I guess... Katie found the recipe."

Ethan's mom looked at him from under the eyelashes. "I heard you just now."

"You -- oh," he said sheepishly. "Sorry. We'll try to be more quiet."

She shook her head, then sat on a bar stool on the other side of the kitchen counter. "I wonder... Was it mainly because she's your sister? Or did it happen simply because she is young, hot and willing?"

Ethan blinked, surprised that his mother would speak to him so candidly. "Uhm..."

"You don't have to answer, of course," she said, glancing sideways. "I'm just curious whether my son grew up to be like most teenagers, who'd jump any pretty girl who smiled at them nicely..."

He felt his cheeks getting warm, and it wasn't the heat from the oven. "I... well, you know..."

"Oh, don't get so flustered! Nothing wrong with doing what the nature intended," she said reassuringly, and Ethan thought she even saw her wink. "In your case, I'd say it's about time. Sister or not, this girl seems to be the exact right kind of 'bad influence' that a boy like you could use..."

Not entirely sure what his mom meant, Ethan simply spoke his heart. "I love Katie, as a sister. But it's like, impossible not to notice how hot she is! When she asked me if I would like to, uh, have sex with her, I just couldn't resist..."

There was a brief silence between them, until Katie's voice could be heard down the hall. "Did you get that lasagna out of -- Oh, hi Mom..."

"Hey," her mother said, smiling, yet looking over Katie's naked form in a way that made the girl blush. "Seems like you guys have cooked us something really good. And you cleaned up your mess, too! Very nice..."

"Uh, thanks Mom," said Katie. "Please, take a seat!"

Understandably, dinner was a little awkward. Ethan kept glancing at his sister's exposed breasts, getting caught by his mom and feeling embarrassed about it, then realizing he shouldn't really feel like that anymore, then somehow forgetting it when Mom noticed him stare at Katie's chest again. After a few more rounds like this, Katie caught on to the fact that both of them were essentially looking at her boobs most of the time, so she made a show out of sitting upright and puffing her chest as she giggled.

"Poor Ethan has trouble concentrating on his food!" said Mom, chuckling. "What have you done, Katie? The boy needs to eat if he is to keep up with you!"

"Oh, don't worry Mom! He's been keeping up just fine, for the most part," the girl said, teasing her brother, then rubbing his shoulder in reassurance. "He does not disappoint where it matters, I can tell you this much!"

"Really? How many times?"

"Mom!" the siblings cried in unison.

"Nuh-uh," their mom didn't relent. "If you are going to fuck like rabbits wherever you want, then the least you can do is indulge your old mother's morbid curiosity. So?"

Ethan protested, "Mom, you are not old!"

"Shush, bro, I'm counting," Katie chided him. "Ugh, six times maybe?... We kind of just rolled through the day, so I wasn't really paying attention. Then we got hungry and came downstairs, and... well..."

Katie's mom looked at her with raised eyebrows, and threw the same glance at Ethan. Shocking both of them, she then bent down and looked under the table, chuckling as she spied her son's latent erection. "Oh my! And it seems my boy isn't even done yet," she said, her voice betraying a hint of pride. "Someone needs to take care of this, and soon!"

Katie wasn't sure, but there was something about the way Mom said it that implied it might not have been his sister that she had in mind...

"Well, that can't be me!" Ethan said with a laugh. "It is forbidden for me to jack off; Katie's orders!"

"Yeah! Don't even think about it, brother," his sister said, reaching under the table to stroke his rock-solid hard-on. "This is *my* job now! Finish up, and we can go upstairs..."

"Absolutely not," their mom interrupted, sporting an almost mischievous smirk. "Ethan needs to put some meat on his frame. He should have seconds."

"But Mooom!" Katie whined, for a moment sounding like a petulant child. "I want Ethan to.... ugh, you know!"

"To fuck you? Yes, honey, you can use adult language with me," her mom said, still smirking. "And I don't understand what's the problem. Wasn't this the whole idea? Any time, any place?..."

Was this a challenge? It sure felt like one to Katie! Could she actually go through with it, like she had promised, and allow Ethan to use her body even with their mother sitting right across the table?... Fucking her brother was one thing, but doing it right in front of Mom was on an entirely different level! She realized she could be in over her head, but that didn't mean she wouldn't swim deeper, right?

"Scoot away with your chair, bro," she commanded, waiting for Ethan's hard cock to emerge from behind the tablecloth. The moment it popped, Katie stood up and straddled her surprised brother, holding on to his shoulders as she sank onto his rigid shaft. When the pleasurable gasp died on her lips (as did the more astonished one on her mother's), she twisted her body to the side and pointed at Ethan's unfinished meal with an immensely satisfied grin. "Bon appetit, dear brother! You'll be okay eating and fucking me, right?"

"You are incorrigible!" Katie's mom sighed in exasperation, her eyes glued to the mating couple. But she wasn't even sure she believed her eyes; she just snorted a laugh at the ridiculousness of the whole situation. "Alright, this works. Just don't break the chair, okay?... Kids?"

They didn't seem to hear her, though. Ethan and Katie were really fucking now, largely oblivious to their surroundings. Funnily enough, it was his sister who fed Ethan bites of lasagna, using her impressive flexibility to scoop up the food while she was grinding against her brother's crotch. He didn't have to do more than simply chew -- and feast his hands upon his sister's sleek body, of course.

Their mother eventually shook her head, smiled weakly to herself again, and left the kids to enjoy their impromptu encounter.

At least doing the dishes would be on them, too.

***

When Linda woke up in the morning, she thought she just had a really weird dream. She remembered coming back from work, but for some reason her children were naked?... And they were eating dinner, and something happened there... She wasn't exactly sure what.

"Oh god, Ethan!... Yes! Just like that! Fuck me, brother, fuck me, fuck me, fuck meeeeeee!!!"

...Oh.

Ooooh!

Right -- now she remembered.

Ethan and Katie were having sex. They were having sex *with each other*. They'd been bored and horny, and apparently it just sort of... happened. Like any mother would, Linda wasn't exactly pleased to learn about this. But like few mothers would, she decided she wasn't going to prohibit it. After all, she trusted them. They were adult enough, and 'incest' was just a silly word. They were simply having fun, and no one was getting hurt by it. So, she decided she'd just let them be.

But then Katie kept pushing.

The two of them wanted to stay nude, at all times, including around their mother. And apparently, they had this agreement that they were both fair game for each other: if one of them wanted it, then they would just start fucking immediately, right on the spot!

Initially, this seemed insane to her, but Linda believed in freedom above all, so it wasn't long before she started looking for excuses to justify this arrangement. They were young; their hormones were raging; Katie has always been promiscuous; Ethan was having sex for the first time and he needed a lot of practice; it was summer; they wanted to experiment -- lots of good, valid reasons.
But there was one more, the most important one of all... She didn't admit it to herself until later, but that didn't prevent her from granting her kids' the sexual freedom they desired.

"Give it to me, bro!... Fuck me! Fuck me with your huge cock!... Ooh, oooh, ooooh!... Yes! Ooh, oooh, ooooh, oooooh, ooooooooooooooooooh!..."

And boy, were they taking advantage of it! Before dinner, *during* dinner, after dinner, at least once more later in the evening, and of course they slept together, too. Judging by the sounds coming from Ethan's bedroom, today they picked up exactly where they left off last night. Linda was sure they'd be fucking when she leaves for work, and she suspected they would be going at it when she comes back home, too. There was just no stopping them; her teenagers were simply insatiable!

And Linda just couldn't tolerate it anymore.

Which is to say, she couldn't tolerate being left out!

It started with Ethan's dick, of course. Linda noticed it immediately, even before she learned of their incestuous activities. She had touched herself in her home office, thinking how it would feel to get pounded by such awesome specimen. Her husband, that cheating bastard, was no slouch in the cock department, but he had nothing on his own son. Ethan had to be over 10 inches long! And he had balls to match, too. No wonder the boy had to masturbate so often: they must be filled to the brim with hot, teenage cum!

But it hasn't been only about her son. Though Linda wasn't particularly into girls, save for a few encounters in college, she now found herself strangely attracted to her tall, athletic daughter. She had that carefree, effortlessly sexy attitude about her, and she simply radiated youthful vigor. To her own shock, she found herself wondering what her pussy would taste, especially when filled with her brother's warm seed...

Indeed, that was the hottest thing: the two of them actually fucking. She got a glimpse of it when they started having sex at the dinner table, and it got her so horny that she had to leave in a hurry. Even before that, she couldn't help but to egg them on, and she was thankful Katie somehow interpreted her allusions as just Mom being mom. For all her sexual experience, her daughter could be so naive sometimes...

"Oh my god, Ethan... You are so deep! Fuck! Your cock... I fucking love it!.... Aaaaah!"

Mmm, yes, Ethan's cock... When Linda left them after dinner, she went to her bedroom to spend some quality time with her trusty 8" dildo. Pushing it into her sopping wet snatch, she imagined it was her son's much bigger cock ravaging her mature pussy.

But she wondered: would Ethan even want to fuck her?... At 5'6", she was shorter than Katie, and she had nowhere near the fitness model body of her daughter. However, Linda more than made up for it with her generous curves, including large boobs and enticingly flaring hips. Her Asian heritage showed in her cute face, still looking the same at almost 40 years old as it did when she was only 20. Overall, Linda was a sexy, voluptuous woman. Surely a young buck like Ethan wouldn't pass on the opportunity to sample her feminine charms?...

Well, she wasn't sure, but she could at least stay optimistic. Like almost all teenagers, Ethan thought with his dick; he admitted as much, saying that Katie was simply too hot to ignore. If Linda could steer his lustful attention towards her, then perhaps she would get to feel her son's thick shaft stretching her pussy, too.

...Not that she wanted to drag him away from Katie. No, not at all! See, Linda wanted to have sex with *both* her children. After a failed marriage, and years of shoddy dating life that followed, her curvaceous body was desperately yearning for attention. Her own kids has just showed her how crazy and passionate sex can be, and it was all she could think about anymore!

"Keep fucking me, Ethan! I need your cock in me... Fuck me, bro! Then fuck me again... and again... and again... Oh yeeees!"

Thankfully, Linda had the foresight to set the alarm clock half an hour early. Her quivering pussy definitely needed another workout.

***

Ethan put down the dumbbells and wiped the sweat from his brow. He knew better than to push himself too much, especially the first few times, but he really hoped the results would come quickly. He urgently needed to get in shape, both in strength and endurance, or else he'd never be able to keep up with his super-fit sister. And he really, really wanted to...

Breathing hard, he hopped on the treadmill and set it to a light jog. It was liberating to exercise in the nude, even though his semi-hard dick would often flop around as he ran. At least that body part of his, the most important one, appeared to be in excellent shape. It never failed him during the yesterday's sex marathon with Katie, and then he was up and ready to continue fucking her in the morning, too!

Ethan thought, jokingly, that it was all those years he spent jerking off that prepared him for the never-ending trysts with his sister. The true reasons, of course, had more to do with Katie herself. She was incredibly hot; totally shameless; hornier than maybe even he was; and sexually demanding in just the right way that made Ethan rise to the occasion, time and time again.

For the last 24 hours, the two had been inseparable, rutting like wild animals and rocking the house with Katie's endless cries and moans. This was really the first time they gave each other some space, and put their nonstop fuckfest on a short, very much temporary hold. Ethan used the break to go to the basement gym, like he had planned, while his sister finally got to do something about those pesky tan lines.

But even as he trained, sex was constantly on Ethan's mind. He kept thinking back to their lurid sessions, including possibly the craziest one of them all: when they started fucking right at the dinner table, in full view of their mother! He still couldn't believe Katie has convinced Mom that this would be just fine -- that she should simply let them walk around naked and fuck wherever they pleased.

What mother would allow that? Only the coolest one, that's for sure! His mom was truly the best mom in the world, he thought. He pictured her standing between him and his naked sister, biting her lip as she tried to make sense of it all.

It was really cute.

His mom's face was cute, and very pretty.

Actually, the more he thought about it, the more he had to admit that Mom was just a very pretty woman.

Was 'pretty' even the right word, though?... No, Ethan realized. He only used it to conceal -- from himself no less! -- what he really thought about his mom.

She wasn't just pretty: she was hot! Those enticing curves, seductively accentuated by her body-hugging sweater and tight jeans... She wasn't dressed to impress, as she had just come back from work, but Ethan's subconscious had definitely picked up on her undeniable sex appeal. It was only because he'd been distracted by Katie fucking his brains out that he didn't realize it much sooner.

Ethan's mother was a MILF, and the "I" in there? That was him!

He slowed down the treadmill to a stroll, his cock rock-hard from the obscene fantasies he was now indulging in.

Mom was naked and on all fours, moaning his name as he drove his rigid meat into the steamy hot depths of her mature vagina. The same hole Ethan had come out from, he would now pound as hard as he could, hips bouncing against the soft butt cheeks of his voluptuous mother as he railed her with his massive cock. Her large, pendulous breasts would sway from the force of his long thrusts, and she would cry and groan as she creamed herself repeatedly upon her son's huge shaft. In his fantasy, Ethan would have no problem fucking his mom for hours, giving her more orgasms than she thought any woman could ever experience!

"Fuck, I need to cum," he said out loud, looking at his throbbing erection. It was tempting to just rub one out right there, but he knew a girl who would definitely appreciate if he brought her a big hard-on. His cock-hound of a sister was currently sunning her nude body in the backyard, so that's exactly where Ethan went next, right after a quick shower.

Sure enough, she was lying on a chaise lounge by the pool, eyes closed as she enjoyed the late morning sun. Quietly, her brother crept behind her and waved his swollen cock right above her lightly smiling face. The turgid shaft and the engorged balls cast a long shadow over Katie's neck and chest, and she opened her eyes to check why the sun was suddenly all gone. She saw there were no clouds in sight, but the sky was still darkened -- by her brother's enormous dick.

"Bro, I'm trying to get a tan here!" she scolded him jokingly, the smile now turned into a big grin. "Back from the gym already? I can see there's at least one muscle you have really pumped..."

"Yeah," he said simply. "I got horny."

"Been thinking of me, stud?" she purred sultrily, her hands reaching up to stroke his achingly rigid cock. "Wow, it really got you worked up, huh? Well, tell me what it was, brother! We can make that hot fantasy of yours come true..."

"Uhm... that might be difficult," he said cautiously. "I was actually thinking about Mom."

"Yeah, I still can't believe we are getting away --" she started, then suddenly stopped rubbing his cock when she realized what her brother actually meant. "Whoa! You really have been *thinking* about Mom! And it got you hard!" Katie said, letting out a lighthearted chuckle. "Damn, bro! That's fucked up," she added, then simply resumed stroking his large erection.

Ethan was dumbfounded. "You-you're not mad?"

"At you? When I have my hands on your huge cock, and I'm pretty sure it won't be long before it's going inside my wet pussy? Yeah, I don't think I could get angry with you right now," Katie said with a laugh, then continued in a sultry tone. "But maybe I should?... If you were fucking Mom, would you still have time for your horny big sister?"

"Always," he said, ogling her naked, glistening body. "Forget about Mom! Let's go back to bed, sis."

She giggled. "Do I have to remind you again, brother? Anywhere we want," she said huskily, turning around and getting on her hands and knees. "My pussy is always wet and ready..."

Ethan didn't need to be told twice. He moved behind his sister and lined up his stiff rod against her vaginal opening. Much more confident than he was just the day before, he pushed his rock-hard cock deep into his sister's dripping snatch.

He didn't know it, but Katie had been fingering herself as she lay out there in the sun. staying wet and horny for whenever her brother would come back to ravish her. She didn't really need much in the first place, as Katie was practically always ready for sex now, but she'd tease her clit all the same, driving her insatiable libido to whole new levels.

"Oh fuuuuuck! I missed your cock so much!... Fuck me, Ethan! Fuck your slut of a sister! Make her come on your huge prick!"

Ethan gasped. Until now, he hasn't heard Katie say that she was a slut, not even in the deepest throes of their shared passion. It surprised him just how hot it was, and he started fucking her harder.

"Are you... a slut... sis?" he asked, in between his deep thrusts.

"Oh yeeeees... I'm such a slut... that my own brother... fucks me... whenever he wants!"

"And you like it," he said, finding the confidence he didn't think he had.

"I love it!... Oh god... I never want him... to stop fucking me!"

His pride soaring, he added on a whim, "What about Mom?"

"He... he can fuck her too! Oh yes... That'd be soooooooo hot!"

Katie was almost out of her mind with lust -- almost. What she was moaning out, as her brother pounded her slutty pussy, was exaggerated to be sure, but also more or less true.

When Ethan told her that he was hot for Mom, it wasn't the first time Katie thought about their mother in a sexual context. She definitely wasn't truly bisexual, but Katie found herself attracted to women on a number of occasions, particularly in college, but also back in high school. Her nearly boundless sex drive, and a very casual attitude, led to more than instance where her current boyfriend would sweet-talk her into a threesome. She always enjoyed making out with another girl, even if it was mainly for the guy's benefit, and would typically find herself fooling around with the female extra long after her boyfriend was spent, and snoring.

On her own, however, Katie didn't usually go for women. The thought of her mom getting involved in their incestuous activities hasn't really entered her mind, not until Ethan mentioned it. Sure, Mom had already "involved" herself, when she normalized their son and daughter having sex all over the house, but that only made her a passive bystander. Could they get her to actively participate, too? Katie wasn't sure. It was too complex to ponder right now, with her brother's cunt-splitter making her shudder with every slide into her slick pussy!

"Hah!... You really are... a slut," Ethan groaned, a fresh load of cum boiling in his bloated nuts. "Maybe you would even... fool around with Mom yourself?"

"Fuck yes!... I'd eat my brother's cum.... out of her pussy... in a heartbeat!"

This was getting too much for Ethan, who had been a virgin only a little over 24 hours ago. With a final, strained groan, he spurted what felt like ounces of his hot jizz deep inside his sister's clenching pussy. It set off Katie to her own powerful orgasm, and she cried out in ecstatic pleasure as her brother blasted his seed into her, one wave after another.

She eventually just collapsed on the lounge chair, overwhelmed by the intensity of her climax. The last few shots of Ethan's cum landed on her lower back and ass. She lay like that for a few moments, savoring the afterglow, until she felt something warm and thick rest in the valley between her taut ass cheeks.

"Don't mind me, sis," said Ethan. "I'll just use your ass crack like this... It doesn't count as jacking off, right?"

Katie snorted a laugh. "Be my guest, bro! And it does feel pretty nice, actually," she said, twisting her head to watch her brother slide his big, still hard cock along the cleft of her shapely derriere.

She winked at him, rather impressed by his rapidly growing boldness. Her seduction of Ethan, unplanned as it was, has already paid off massively -- not only in countless orgasms, but also in the pleasant comfort of always having access to her brother's hard cock. It was exactly what Katie's horny pussy needed, and a great start to a summer filled with sex.

Now she just had to figure out how to get Mom to join in.

***

All throughout the day, Linda has been feeling very sexy.

The outfit she had picked has definitely contributed to it, as she was clearly pushing the limits of her company's generally permissive dress code. A white, semi-transparent blouse with a prominent cleavage, and a pair of tight yoga pants that highlighted her large butt -- those were very much on the edge of what could still pass as "professional", even in the laid-back software house where she worked.

If the guys there weren't so intimidated by some bitter and sad bitches who would report anything off-color to the HR, Linda would likely have enjoyed plenty of suggestive compliments. In this day and age, however, she had to be content with perhaps catching some furtive glances, all promptly averted before she even had a chance to smile.

Not a huge loss, she thought; these weren't the men she wanted to impress with her flattering getup. Rather, it was about one particular man: her son. It was one part of Linda's plan to get the young stud to notice his sexy mother, the other being a much more revealing set of clothes that she would now be wearing at home. What she wanted was to capture Ethan's attention from the moment she walked into the house -- a tall order, really, considering what he'd likely be doing at the time...

"Hnnng!... Hnnng!... Ooooooh!... Yes!... Right... there..."

Yup, she was right: they were, in fact, still going at it like bunnies! This time, they even picked not only a spot outside of their bedrooms, but also a rather lewd position. Linda saw that her son was kneeling on the floor, right here in the living room, in front of a couch that her daughter was "sitting" on. In reality, her perky butt was hanging beyond the edge of the cushion, and she was holding on to the back of the couch for purchase, all while her sleek muscular legs were swung over Ethan's shoulders.

Elaborate though it was, this position opened up Katie's pussy and allowed her brother to fuck it freely, with nothing to stand in the way of his huge cock. Needless to say, Linda's daughter was shrieking like a banshee, cumming repeatedly as her brother pounded her without mercy. They were both dripping with sweat; they must've been fucking like this for quite a while now.

And Linda couldn't help but stare. She leaned across the kitchen counter and just... watched. She didn't even feel like touching herself, though her pussy was obviously dripping. Instead, she simply admired the lurid spectacle -- this beautiful display of pure, carnal passion. For the next ten minutes, Linda was totally mesmerized, until the loud roar of her son's powerful orgasm brought this erotic masterpiece to a close.

"Ahem," she cleared her throat, pretending that she came in just now. "Kids, it's me. Try not to make a mess when you stand up."

Katie looked at her groggily, still experiencing the aftershocks of her nearly continuous climax. "Moooom... Ethan is fucking me sooooo good!" she said rapturously, a smile of pure bliss painted on her tired face.

"Glad to hear it, sweetie," Linda replied, feeling naughty to carry on such a conversation. "Have you been doing this all day?"

"More or less," Katie said dreamily. "Ethan worked out for a bit, then we had some quick lunch, but other than that... Yeah, Mom, all day..."

Life's not fair, Linda thought. While she had to deal with a botched database migration, her children literally fucked the day away! She had to be patient, she told herself. Just a few days, or maybe a week or two, and they'll realize that Mom is just as much a sexual creature as they are. And when that finally happens... oh my!

"You must be starving," she said, out of genuine care. "Get your butts in the shower while Mom makes you something to eat!"

"Thanks, Mom," Ethan said, helping his sister stand up. "You really are the best!"

The siblings waved back to their mother, then quickly made their way to the bathroom. They were in a hurry to take that shower, although washing was of secondary importance. Even though they have been screwing on the couch for the past hour, not to mention other places throughout the day, Ethan was inside his sister as soon as the water was running. Their sexual appetites remained robust, whetted rather than dulled by their constant rutting, and that was all the better for pulling off their new scheme.

"Oh, Ethan... Not that I'm complaining... but shouldn't we wait until Mom's around again?"

"I want you now, sis," said Katie's brother, pushing her against the shower wall while he thrust into her from behind. "Don't worry, we'll do it again in front of her later."

Their plan was precisely that: to flaunt their incessant mating around Mom, as often and as obnoxiously as they thought they could get away with. It was their hope that she would get horny, watching her children fuck, and...

Well, that point of the plan was essentially three question marks, but the intended "profit!" part was to have her strip naked and join the sexy fun times. Katie came up with this, and even she thought that it was rather far-fetched, but hey, why shouldn't they at least try? At "worst", they'd have even more, and even naughtier sex!
***

"Dinner's on the table!"

Still in the living room, the siblings were now fucking *behind* the couch, well within the earshot of Mom as she cooked. They paused momentarily and got up from the floor, then Ethan sat at the table and Katie sat on his cock. They did it as if it was the most normal thing in the world, and quite frankly, for them it probably was.

"You need to eat, kids," their mom reminded them with a smile, "and clearly, you need to fuck too! This is really working out well for you, isn't it?"

"What do you mean, Mom?" Ethan asked, blatantly groping his sister's naked boobs.

"Your sexual experiment, of course," she said, chuckling. "You two are just so hungry for each other... Since you started, it seems like sex is all you ever do anymore!"

Ethan blushed, a little startled by Mom's apparent interest in their incestuous affair. Though his cock stayed hard inside his sister, for it rarely ever softened anymore, he stopped touching her breasts and moved on to some more innocent body parts. Katie moaned, seemingly in complaint, but mainly because her brother's cock hit a more sensitive spot in her pussy as he fidgeted in his chair.

"No, don't be shy about it, son," Mom added, so Ethan reluctantly put one hand back on his sister's breast. "Remember that as your mother, I will always support you and your sister's life choices. You two should feel free to fuck as much as you want!"

"Oooh," moaned his sister, relishing the sensation of her soaking wet pussy impaled upon Ethan's huge cock. "We will, Mom... My brother and I... want to spend the whole summer... just fucking..."

"Sure, why not?" Linda casually agreed, even though her own pussy was practically a swamp at this point. "It's your summer break, right? You are supposed to get a little wild! And you, smart kids, have found a way to both do that, and to stay safe and sound here at home. I don't have to worry what my kids might be doing," she said with a laugh, then added in a low voice. "because I always know what the answer is..."

"Exactly!" Katie said, and the giggle that followed was lustfully drawn out into a moan of pleasure. "I never expected... it would be so good!... Now, Ethan and I... We simply cannot stop fucking!"

"Aww, my beautiful horny kids! I feel like I should be doing more to help you with that," Linda said, letting her words hang in the air for a moment. "How about I make you breakfast in the morning, and leave something for lunch in the fridge? And of course cook dinner, every day from now on... Would you like me to do that?"

Ethan's eyes grew big. "Wow, Mom! That'd be awesome!"

"I bet," she said with a grin. "With all this exercise, you need a lot of food to keep up your strength! Speaking of which..." Linda pointed at their plates.

Taking the hint, the siblings dug into their food. Or more accurately, Ethan dug into both his and his sister's plates, feeding Katie while she was slowly grinding on his lap. She felt deliciously naughty, knowing she'd now be having all her meals with her brother's hard cock stretching her tight pussy.

Meanwhile, on the other side of the table, their mom dropped her gaze to her own plate, and sighed.

***

A pattern has developed over the next several days.

The siblings would wake up, usually in Ethan's bed, and immediately start having sex again. Sometimes, Katie would wake her brother with a morning blowjob, swallowing his huge overnight load before gleefully impaling herself upon his rigid shaft. After a short warm-up, they would move to continue fucking in the shower, then eventually make their way downstairs to eat breakfast that their mom left them. It was then time for Ethan to work out in the basement, so Katie would go outside, to enjoy both the sun and a long session of self-pleasure by the pool.

By the time her brother came back, she would be dying to get fucked again. Ethan always obliged, sticking his hard cock inside her gushing pussy and pounding it with everything he got. He would soon get hungry enough to drag his horny sister inside, ignoring her half-serious protests that she needed his hard cock more than she needed food.

Ethan would then fuck his sister while he warmed up their lunch, fuck her while they ate it, and then fuck her on the counter while they decided where they would fuck next. Katie's room was often the answer, since her bed would still have clean sheets, but any spot in the house worked. They weren't picky at all; they were horny!

And so they fucked, again and again: brother and sister consumed by incestuous passion. Entire day would pass with them hardly ever stopping, as their sex drives were now practically without limits. With no clothes, no inhibitions, no worries, and no distractions, their high teenage libidos had further developed to become virtually insatiable. Their young bodies were quickly adjusting to the physical demands of nearly constant sex as they continued to fuck endlessly, never far away from the next mind-blowing orgasm.

Thus, when Linda came home, she would find them just like she has left them: going at it with wild abandon. She only had moderate success at getting herself involved in their mating, despite numerous efforts that included wearing increasingly skimpy clothes while at home. Her choice outfit now consisted of a strappy tank top and some barely-there shorts, exposing her great legs and emphasizing her large bosom. While the rutting siblings would sometimes notice, they were still too engrossed in each other to offer more than a passing glance or compliment.

Indeed, both Katie and her brother were too distracted to notice the changes in Mom's behavior. Since sex was basically their life now, they saw nothing unusual about their mom taking interest in their erotic activities. Their original plan, to turn their lovemaking into a distracting and attractive nuisance for their mother, seemed to have sort of backfired. Yes, Mom was now a background fixture of most of their lurid sessions, but it was like a suburban mother watching her kids' soccer practice. Her attention didn't seem lustful to them, only caring and supportive, as if she was guiding her children to embrace the sexual nirvana they had accidentally thrown themselves into.

They had no idea just how wrong they were.

In reality, Linda was fighting a battle of wills with herself. On one side, there were her motherly instincts, to which the mere thought of committing incest was absolutely vile and repugnant. Curiously, those same instincts had no problem with the incest that was already happening, right in front her eyes, just as long as it stayed strictly between her children.

As their open-minded mother, her duty was to aid and support them in exploring their burgeoning sexuality, in any way she was able to. If it meant serving them home-cooked meals, changing their soiled sheets, and wiping the furniture their bodies had touched -- all the while they did nothing but engage in nonstop marathons of incestuous sex, day in and day out -- then that was exactly what she was going to do!

The other side was more rational, but also more than a little selfish. Ethan and Katie were adults now, it said, and their new relationship was nothing more than that of pure, unbridled lust. They both craved sex, they had no qualms about fucking each other, and they even took it to the next level by making sex their first, nay, their only priority in life. What sense did it make for their mother not to be fucking them, too? She was still hot, and obviously willing; her son Ethan would probably fuck anything with a pussy; and her daughter Katie was a slut through and through.

If Linda managed to just stop being Mom for a minute, the three of them could be having incestuous threesomes every single day...

But as it stood now, it was only the siblings who enjoyed the pleasures of familial bonding through sex. Over dinner, they would now readily volunteer to their (ostensibly just curious) mother any lurid detail of their sex-packed day that hasn't been lost to the blur of countless orgasms. Of course, this only enhanced the sensations of their present coupling -- for they didn't stop fucking even when they talked to Mom! -- which in turn made them forget just how ludicrous their family life looked like. Once they ate their fill, the sex-crazed couple would thank their mom and return to Ethan's bedroom, which they usually wouldn't leave for the remainder of the day.

What they also wouldn't do, to Linda's immense frustration, was to show any signals that they were starting to see Mom as, well, more than just mom.

She was at her wits' end. This clearly wasn't working. Linda could pat herself on the back for being an amazing mother, but she was paying for it with her own sanity.

She needed her son to pound her dripping cunt with his massive cock. She needed her daughter to eat her to a shuddering orgasm. She needed them both!... How did it get to this point, that her totally sex-obsessed children couldn't see that their mom was so desperate to be fucked?! And how was she finally going to change this?...

Then, one day, something finally stirred inside her.

Something primal, and lustful, and utterly disdainful of the so-called "morals".

She knew what she had to do.
Summer Inside His Sister Pt. 03
A new beginning for the whole family.
Friday started for Ethan the same way his past few days did. He woke up with a parched throat, a dull ache in almost every muscle in his body, and of course, a huge hard-on. Lolling his tongue around, in the vain hope to make his mouth feel less like Mojave desert, he made a mental note to haul a few more gallon-jugs of water to his bedroom. Hydration was important, especially during long stretches of physical activity; and lately, Ethan had been getting more exercise than he ever did in the entire eighteen years of his life.

Raising his head slightly, he looked around the bed and smiled. Next to him was his beautiful older sister Katie, happily snoring away as she lay on her stomach with the legs spread out. Ethan could just about spy the puffy purple lips of her labia, along with a thin streak of dried cum connecting it with the crusty puddle beneath.

This has been his final load from yesterday, deposited inside his sister's pussy only moments before they both drifted to blissful sleep. Seeing her like this, naked and leaking his own seed, made Ethan's cock twitch with desire as he recalled their last steamy session of the day before.

He and Katie had been having sex for several days now. It started about a week into the summer break, shortly after Katie came back home following her first year in college. The siblings' incestuous liaison wasn't at all a secret: the very first day it began, they were actually discovered in the act by their mother.

Thankfully, she was open-minded enough to realize there was really nothing wrong with it. It was merely her kids acting on their strong, physical attraction to each other. Being a good mother, she wanted to support their choices, regardless of what the wider society would think about them. She therefore fully approved of their taboo relationship, and even went so far as to accommodate the highly unusual way in which they wanted to conduct it.

The arrangement was originally Katie's suggestion, but it was hardly surprising that Ethan agreed to it in a heartbeat. Though it was ostensibly for his benefit, as a recent virgin who needed to learn more about sex, his sister was equally excited about him keeping his part of the deal.

To put it simply, the horny siblings agreed to remain nude at all times, allowing themselves unrestricted access to each other's bodies. Any time Ethan was around Katie, he was free to grope her, feel her up, squeeze her hard nipples and finger her wet pussy, or to do anything else he felt like doing to his sexy, naked sister. In turn, she was allowed to take the same liberties with her brother, which could go all the way to surprise blowjobs and just regular, full-on sex.

These were the rules by which they wanted to carry out their incestuous affair, and what followed as a result had exceeded their wildest expectations. Although they had been some very horny teenagers already -- Ethan jacked off religiously, while Katie had many sexual partners -- it was nothing compared to the way in which this total sexual freedom had affected their libidos.

On the very first day, the siblings had sex so many times that Ethan decided he must get in a better shape, just to make it less physically taxing on his body. Then the next day, he and Katie fucked through all of morning and most of the afternoon, until Mom came home and treated their children to a delicious dinner. Amazingly, they actually fucked *while* eating it, too: with Katie slowly rocking on Ethan's lap, his hard cock firmly lodged inside her dripping wet pussy.

From there on out, the insatiable lovers had sex pretty much all the time, fucking like rabbits in every spot of the house. Their mom had been extremely accommodating of this "experiment," as she called it, and normalized the fact that her kids were now rutting openly like wild animals, often in full view of their mother!

Totally supportive of their sexual self-discovery, she served them food, made their beds, and cleaned every mess they'd make while fucking each other for an entire day. Moreover, she actually expressed interest in the particulars of their lurid activities, not unlike a mom who would want to know if her kids are doing well in school. She always asked if they felt like they were making the most out of this opportunity, to explore their sexuality by letting their desires run completely free.

To Ethan, the answer was obviously a resounding yes! Every now and again, he would still get this feeling that it was all just a wonderful, erotic dream. Ever since Katie gave him a free pass to fuck her whenever he felt the urge, it seemed like all he'd been doing was thrusting his large cock deep into her heavenly tight pussy. With his teenage hormones in complete overdrive, he was always hard and horny for his hot sister.

Just like now, when he saw her stir and slowly open her eyes; Ethan's cock was already throbbing with anticipation.

"Mmm..." Katie purred sleepily, twisting her head as she followed her brother's movements. He was on top her now, his big stick poking at the entrance to her warm tunnel, while he kissed her neck and gently nibbled at her ear. "Ooh, Ethan..."

"And good morning to you, sis," he whispered, rubbing the tip over the moist lips of her pussy.

"You can wake me up like this any time," she said between ragged breaths, her slit quickly lubricating itself in response to Ethan's prodding. "I just love your hard cock, bro!"

"All for you, Katie," he said, bathing his shaft in her leaking juices but carefully avoiding the entrance to her sizzling hot furnace. "Since my slutty sister likes my cock so much, let me just make sure that everything down there is well acquainted with it..."

He continued daubing his rigid meat in his sister's copious moisture, making her give frustrated groans.

"Please," she breathed. "Don't tease me! I'm already so wet... I need you now!"

Taking matters in her own hands (or lips), she lifted her butt and pushed against her brother. Surprising Ethan with her craftiness and agility, she then caught the head of his swollen cock and sheathed it inside the opening to her vagina.

Amused by her eagerness, Ethan let out a breathy chuckle. He braced himself against the bed and pushed the rest of his rock-hard shaft all the way into his wanton sister, making the horny girl squeal in delight as he started rhytmically fucking her again.

***

Linda sat on the couch and felt like she was about to explode.

Normally, she'd be looking forward to the weekend. It was two whole days of respite, away from her stressful, though admittedly rather satisfying job. Especially weekends like this one, when she wasn't on-call, standing by to jump in and douse whatever virtual fire threatened to engulf her company's servers.

Yes, normally a weekend like this would be the perfect time for some cozy rest and relaxation at home. But for the past few days, Linda's home had been anything but normal.

"Yes! Yeees!... Oh my god... Fuck me, Ethan! Fuck your sister with your big cock!... Yes, ooh, yes... oh... Fuuuuuuuuck!..."

She could scarcely believe it. Her teenage kids had been going at it for literal days now, and it was slowly driving Linda insane. No, she didn't have any problem with her children having incestuous sex. What she couldn't stand was the fact that they weren't also fucking *her*!

In a way, she only had herself to blame. She really did everything she could to accommodate their torrid affair. She was acting on a faint hope that by involving herself in their sexual activities, if only from the sidelines, she would make them see her as the hot and horny woman that she was.

Lately, she even stopped being in any way subtle, as her wardrobe at home now consisted of a sports bra and a pair of ass-hugging shorts. Every day over dinner, she would listen to lustful moans that punctuated their eager recollection of the ongoing debauchery they engaged in. And she would drop one suggestion after another: that maybe, just maybe, they could think of even more ways to "explore their sexuality."

And yet, nothing had worked! As far the siblings were concerned, she was simply their very cool mom, strict about grades but super lenient about everything else.

Linda was fed up with it. She decided she was done with being just a mother. By golly, she deserved some of that sweet "sexual exploration" herself!

"Kiiiiiiiids!" she yelled. "Movie night!"

A movie night on Friday was their family tradition, or at least it had been before Katie went off to college. An old-fashioned one, perhaps, but it still worked just fine in the age of internet, flat screen TVs, and streaming apps with huge libraries of content.

Today, however, Linda didn't care much for a movie. What she needed was a pretext, to get her sex-crazed kids to come downstairs and sit with her for a while. Sure, there would be some Netflix involved, but the real point was the chill.

"Uhm... you called us, Mom?"

There they were, still naked as jaybirds. Ethan's cock was sticking out at a right angle, slick with what Linda was sure were the pussy juices of his slutty sister. Katie was with him, of course, holding her brother's hand and eyeing his shaft longingly.

"Yes," Linda replied. "Now that Katie would be home for a while, I figured that we could have our traditional Friday movie nights again. You know, just like the old times." She patted the couch invitingly. "So, why don't you sit down? I've got some snacks ready, and we can pick a film that we'd all like..."

The siblings looked at each other, shrugged, and wordlessly decided this wasn't the worst idea. Ethan went first, sitting maybe two feet away from his mother, followed by Katie who, pretty much reflexively, straddled his brother's lap and began to lower herself onto his pulsing hard-on.

"You may want to face the TV, honey," Linda said with a laugh, causing her daughter to blush and quickly change position. "Alright, I think we are all comfortable enough..."

During the first ten minutes of the movie -- a run-off-the-mill action flick -- Katie and Ethan were actually paying it some attention. Linda seemingly was, too, although she often glanced at the leisurely mating couple.

Over time, however, the pace of action both on and before the screen would rapidly increase. Ethan's sister was now gyrating upon his rigid cock, the sounds of her lusty moans drowning what little dialogue the movie had. The boy was quite worked up as well, cum boiling in his bloated nuts, as he flicked Katie's clit with one hand and groped her ample breasts with the other.

Linda was now openly staring at her kids, who were screwing right next to her, the heat within her pussy growing with each passing second. Previously, she would've simply averted her gaze, trying her best to ignore the primal noises of their incessant fucking. Simply hearing it was hard enough already; watching too closely could make her do things, things she might later regret. But now, having cast her doubts aside, she *wanted* to do those things. Her only regret was having waited so long to do them!

So, she kept staring. And, very slowly, she reached into her shorts and found the hard, throbbing nub of her clit.

"Oooh, brother," Katie started to really vocalize her pleasure now. "You feel so good inside me... I'm getting close... really close..."

Ethan let out a low groan, his hands resting on his sister's hips. He knew he should hold off for a moment now, to allow Katie to reach the bloom of her budding orgasm. With a firm grip he steadied her movements, and his eyes searched for some non-erotic scenery to help him delay his own release. He happened to glance at his mom, a sight that should normally be ideal for this purpose, but his eyeballs almost bulged out when he saw how far from innocent the view was.

"Katie," he whispered, pointing to the side with a flick of his chin. "Look!"

There was no denying it: Mom was masturbating! She had a hand stuffed inside her snug shorts, rapid movement of her fingers easy to see under the tight fabric. Her eyelids were half-shut, breath getting quicker and quicker as she worked herself towards a powerful climax. To reach it, she clearly didn't even need to watch her children anymore, though she was still straining her ears to catch the lewd sounds of their incestuous coupling.

But the noises were gone now. Her kids stopped fucking, and their attention was now all on her.

Linda opened her eyes and immediately met the gaze of her daughter. She was no longer riding Ethan and instead watched her mom with a surprised, curious, and intensely lustful expression. For a moment, they both froze.

But then Katie flashed Mom a huge grin, and soon started grinding against her brother again. Every now and then, she would glance at her mother and smile, locking eyes with her as she groaned at the feeling of Ethan's thick cock stretching her insides delightfully.

Linda's heart was racing: she was finally getting somewhere! Trying not to appear too excited, other than from her arousal, she gingerly went back to stroking her inflamed pussy. Her children were once again mostly focused on themselves and their mutual lust, but both of them would occasionally gaze at their mom and smile.

No words were said. The TV was still on, but no one was paying it any attention. Linda's loud moans, Ethan's grunts, and Katie's cries of pleasure filled the air of the dimly lit living room. The whole family was now building up towards a huge climax, together climbing their way to the peak of their shared ecstasy.

"Sis... I don't think I can hold it much longer..."

"Just... a little... more!... oh... oooh... oooooh!... OOOOOOOOH! OH YES! OH GOD! I'M CUMMING!... I'm cumming, Mom!! I'm cumming so hard on your son's huge cock!"

Katie cried out her release, trembling and squirming as the violent orgasm ripped through her young body. Her arms flailed, looking to grip something that could steady her through the overwhelming experience. Instinctively, Linda reached out with free hand and caught her daughter's arm, holding her firmly as the girl kept spasming and crying out in orgasmic bliss.

"AAARGH!" Ethan let out a savage growl. "I'm coming... too!..."

His sister's wildly quivering pussy was instantly flooded with Ethan's massive load. Just like Katie, he kept coming and coming, blasting her love canal with a great torrent of white hot cum. The rich seed soon leaked from her overflowing vagina, ejected by the forceful convulsions of her ongoing orgasm. It dribbled down Ethan's rampant cock and trailed further, forming a small but growing puddle underneath the shaking couple.

"Oh my, Ethan..." his mom spoke in a quivering voice, "this is so much cum!... You'll stain the couch... Oh god, it's so hot..."

Horny like she hadn't felt in years, Linda fingered herself furiously, her own release so close at hand... Her children were still cumming when their mom finally added her voice to the lewd chorus, moaning throatily at the apex of her long-deserved orgasm. Clad in a skimpy sports bra, her plump breasts shuddered on the waves of carnal joy, and she slid limply, momentarily paralyzed by the sheer intensity of her spine-tingling climax.

Linda's shorts were a complete mess, drenched in copious juices from her gushing pussy. To the side, her insatiable children were sitting in a puddle of her son's cum, panting heavily after cumming right along with their mother. The movie, long forgotten, was still playing on the big screen, the main protagonist now involved in some kind of a car chase.

But it all didn't matter.

What mattered was that Linda and Katie were still holding hands. Mother and daughter have at last come together, revealing to each other the incestuous desires that they both shared. Their son and brother was right there, too, ready to begin with them a new chapter in their voyage of sexual exploration.

"Well!" Mom finally said, relieving the lingering tension with a good laugh. "I'd say this was the best movie night in ages!"

***

Linda opened the door to her bedroom and flicked the light switch on. She turned back and cheerfully invited her slightly nervous children to come in. While they had obvious reasons to hesitate -- Mom's bedroom had always been uncharted territory -- it was clear that what happened between them was about to change things.

A lot.

"You can sit there," Linda pointed to a cushy armchair in the corner. "Ethan should be quite accustomed to having his sister on his lap by now," she added with a smirk.

Emboldened, the still-naked duo took the proffered seat, but Katie didn't impale herself on her brother's cock right away. Instead, she let the erect shaft jut from between her legs, resting against her pussy and lubricating itself with her juices. A cute yelp escaped Katie's lips at the contact with Ethan's hard-on, but the horny siblings were otherwise quiet and still.

"I've been awfully patient with you kids," their mom began, facing them as she sat on the bed. "I accepted that my son and daughter were having a sexual relationship. I've tolerated you having sex not only when I'm at work, but also in the evenings. I agreed to the idea of the two of you going nude, of you fucking all over the house, and even of you doing it right in front of me if you wanted to," she paused for a breath, looking at the increasingly disquieted faces of her children.

"I've been very accommodating, feeding you and cleaning after you, so that you could stop worrying about everything else and focus exclusively on your, ahem, sexual growth and discovery... And you've been doing just that, haven't you? For the past week, you've been going at it practically nonstop! I doubt you've ever gone more than an hour between your, uh, sessions, and it's an hour only because that's how long Ethan usually works out. You really want to spend the entire summer on nothing but sex, huh?"

Though the answer was obvious to them, the siblings weren't so sure, not anymore, that their mother would like to hear it again.

"We... kind of do, Mom," Katie tried it anyway. "When I saw Ethan's cock and realized what a stud he was"--her brother's face lit up with a cheeky grin--"I simply wanted him to be my fuck-buddy. But once we actually started having sex, and we stopped wearing clothes and all that... Well, it just got crazy! It's so naughty and exhilarating, to know that we can just fuck each other at any time. It's like we both know that even if we're done for the moment, it won't be long before one of us wants to go again. So, why even stop?" Katie asked with a disarming smile. "Well, okay, I'm sure we'll eventually calm down somehow, because nothing this good can last forever. But I don't want to think about it... Right now, Ethan and I are simply loving this, and we absolutely want to continue."

Ethan was nodding along vigorously. He wasn't completely sure he agreed with everything his sister told Mom, particularly the part that predicted the eventual end to their activities, but he sure as hell wasn't about to contradict her. For now, Katie was taking his throbbing dick inside her pussy at all hours of the day so, in his view, this made her correct about pretty much everything.

"Huh, okay," Linda said hesitantly, trying to not to show how jealous she was of this passion between her children. "Well, if nothing else, I suppose it's a fun way to spend your summer break. Just make sure you *do* calm down at some point, alright?"

"We'll try," Katie said, looking at her brother who understandably didn't want to commit to anything. "But right now, we are just super horny. Leave us to our own devices, and we will be fucking all day, every day! I guess you know that already..."

"Yes, I've noticed," she said, a soft sigh escaping her lips. "It has been rather difficult to ignore. Sometimes, I would get frustrated enough to think you are doing this on purpose. I'm sorry, I know it's obviously not the case, but I was just --"
"Mom," Ethan spoke up, and swallowed, "we were actually, kind of, trying to fuck in front of you. But it was"--he wanted to say 'Katie's idea', but he caught himself in time--"uh, it was because we thought... uhm... that you would... enjoy it."

"Pretty much," Katie jumped in. "You just never told us to go away, or to be quiet, or anything like that. Now I feel bad since it was obviously, uh, affecting you... But we had no idea! Why didn't you tell us, Mom? Ethan has been dying to fuck you!"

"I didn't tell you..." Linda muttered reflexively, then froze as her daughter's words sank in. "WHAT?! Since when? Ethan?"

He stammered, biting his tongue not to say 'always', "Since, uh, you caught us fucking, Mom..."

Linda blinked, several times, then out of nowhere bellowed a fierce, almost savage cry.

"OH MY GOD!"

Her kids jumped, looking in shock at their mother whose fists were slamming the mattress in frustration. "M-mom?" Katie asked with obvious concern.

But Linda didn't hear it. Not when she was letting out all the anger and frustration that had built up in her all throughout the week. All the simmering horniness, all the unrequited desires, all the dissatisfaction and continued disappointment, and the ever-growing, wistful longing for good, hard, wild fucking!

It felt incredibly liberating to finally release all these pent up emotions. She knew that she could at last rectify this awful, horrendous, terrible misunderstanding that plagued the incipient sexual relationship with her children.

Eventually, getting a little winded from her outburst, Linda threw herself on the bed. She lay on her back, motionless, her substantial chest heaving as she stared at the ceiling.

"Mom?... Speak to us, please!"

Linda took a deep breath, feeling the warmth spread from her lungs and course through her body, settling in the area between her legs. The (fresh and clean) booty shorts she was wearing suddenly felt unnecessarily constricting. Having unleashed her bottled-up exasperation, she was now yearning for a different kind of release.

"Tell me, kids," she finally spoke. "When Katie said that you want to just keep fucking, was it exclusively about doing it with each other?"

The siblings exchanged surprised looks, then a wide smile, and finally a hearty chuckle.

"Not necessarily, Mom." she said, feeling a rush of heat that further warmed her already balmy pussy. "I love fucking Ethan, and I've been worried he would eventually find someone else and lose interest --"

"Sis! I would never --"

"-- but," she continued, hushing him with shoulder rub, "as long as he sticks his cock inside me whenever I need it, I'd be thrilled to expand our horizons... Why, Mom?" Katie asked with a mischievous grin. "Do you have someone specific in mind?"

Not taking her eyes off the ceiling, Linda smiled the most wicked, satisfied smile that could fit on her pretty face.

"Yes."

***

It was just like in Ethan's fantasy. Except better.

Mom was on all fours, her lush naked body glistening with a thin sheen of sweat; it coated her pale skin and condensed into droplets as she jerked, shuddered, and writhed in pleasure. Her swaying breasts, large and squeezable pillows of luscious flesh, were grazing the mattress with their pencil-hard nipples, sending electric pleasure right up her arching spine.

Behind the wanton mother was her own son, plunging ten inches of rigid cock-meat into the sizzling hot depths of her mature, yet divinely tight pussy. The eager boy was groaning, as the clenching vagina gripped his retreating ramrod, pulling him back into the very womb that birthed him.

"Wow, Mom," said Linda's excited son. "Your pussy is squeezing my cock so fucking good!"

At the same time, his mom's curvy butt cheeks rebounded from his savage thrusts, jiggling as he slapped into her meaty thighs. His virile gonads, both the size of golf balls and filled to the brim with his thick seed, swung wildly as he plowed her dripping snatch, now and again hitting her sensitive clit for another, sudden jolt of pleasure.

"Oh fuck, this is great," the boy moaned throatily. "You are so wet, it's practically dripping over my balls!"

Linda couldn't audibly moan how incredible it felt, to have her son's enormous dick slide in and out of her sopping wet cunt. She couldn't cry out the ecstasy that was building inside her, and the ecstasy she was already feeling as Ethan fucked her to oblivion. All she could do was savor it, just like she savored the creamy, sweet and salty ambrosia that filled her mouth with every lap of her tongue.

Linda's head was being held in place by her daughter's hands. It was the girl who was crying out in pleasure, throaty moans mixed with shrieks and whimpers; the ebbs and flows of her ongoing climax. Recently flooded by her brother's deluge of semen, Katie's pussy was now being thoroughly cleaned by her Mom's eager mouth.

"Ooooh, right there, Mom... YES! OH FUCK! OH GOOOOOD... Keep... doing that..."

The horny mother couldn't be happier to oblige. Finally, she was exactly where she wanted to be: with her amazing, beautiful, sexually insatiable children, all three of them sharing her large bed and engaging in mind-blowing, incestuous debauchery.

No longer would she have to only watch and listen, while the unstoppable siblings shook the house to its foundations with their endless, vigorous rutting. Linda was about to become a regular feature of the brother-sister couplings, to an immense delight of both her big-dicked son and her feisty, nubile daughter.

"FUUUCK!" Ethan roared, his climax striking him almost without warning. "I can't... hold... Oh fuck! I'M COMING, MOM! YOUR SON IS CUMMING INSIDE YOUR TIGHT PUSSY!"

She let out a muffled squeal, as Ethan's large spurts whitewashed the sperm-deprived insides of her steamy vagina. The numerous blasts coming from her son's prolific cum-cannon sent her spiraling into an orgasm of her own. She practically gurgled on her daughter's gushing juices, gasping for breath as the momentous release took over every nerve in her wildly quaking body.

"Ooooh yes...." Katie moaned. "Cum inside Mom, Ethan! Fill her pussy with everything you got!"

The trio groaned, relishing their generously shared orgasms. The peak of their pleasure was marking a new beginning for the whole family. From now on, all three of them could enjoy the carnal delights together, no longer feeling frustrated or left out.

"I... I can't believe... you kids are doing it... all the time..." Linda said, gasping, as she lay exhausted next to her smiling daughter. "I'm gonna need to... get used to this..."

Katie just giggled. "Don't worry, Mom," she said, beckoning her brother and spreading her legs invitingly. "As Ethan here can attest, it's all just a matter of training and practice!"

The boy just grinned, grasping his barely softened dick and lining it with the entrance to his sister's spotlessly clean pussy. Intimately familiar with her sexy body, he knew just the right speed and angle to make even the first stroke an exquisite pleasure for his horny sister. Katie moaned, yelped, then cried out in carnal joy, a mini-orgasm lighting up every nerve in her body for a brief, ecstatic moment. Locking eyes with her and smiling, Ethan began thrusting into her juicy warmth, slowly and more gently than the royal pounding he had just served their mother.

"Ooh... I'm feeling so nice and full again," she cooed, returning the cheeky smile. "Thanks, bro!"

"Everything for my hot sister," he said, giving her pussy a decisive stab that wrung a lustful moan from her lungs. "Told you I would never lose interest in fucking you!"

"Aww, you say the sweetest things," she said with a breathy laugh, then turned her head to Linda as her brother started to thrust into her again. "Mom? You are still full of Ethan's cum... and I know it's so yummy!... Would you mind... giving me a taste?"

Catching her breath, the mature woman stuck several fingers into the frothy mix of cunt juice and her son's sperm that was slowly leaking out of her gaping snatch. It coated her hand copiously, and Linda couldn't resist to sample it herself; the flavor was tangy but sweet, and she immediately acquired a strong liking to it. Eventually she scooped up more, putting her cum-dipped fingers in her daughter's hungry mouth and having her lick them clean of her son's delicious spunk.

"God, when did I turn into such a slut?" The mother laughed.. "I'm feeding my son's cum to his sister, straight out of my own cunt, while he is fucking her right next to me!"

The horny siblings chuckled. "Mmm... Pretty damn hot, isn't it?" Katie purred, patting Ethan's shoulders to ask him to slow down for a moment. "And tasty, too! I think I'm gonna need all of it, Mom..."

Linda didn't get it at first. "Huh? All of it?"

"Just sit on her face, Mom," Ethan nudged his mother, propping herself up and swinging his sister's legs over his shoulders. "Let Katie eat your pussy like she did yours."

Linda was being blown away by the sheer debauchery her children were asking her to engage in. The renewed ache in her cum-filled pussy, however, had already made the decision for her. Listening to her horny cunt, she easily found the energy to scramble back to her knees. She then swung one leg over Katie's head and, with only a slight hesitation, lowered her dripping snatch onto her daughter's lapping tongue.

"Oooh! Sweetie... This feels... Aaah!"

Within moments she was already shuddering in delight, falling forward on the bed and groaning from the fireworks of pleasure brought about by Katie's oral ministrations. She spread her legs and straightened her arms, her back arching at a concave angle, her sodden pussy forcing itself between the girl's smacking lips and even deeper into her mouth.

Watching it from a feet away, Ethan had to really slow down his deep strokes into Katie's sex. He was afraid that the unbelievably lewd scene -- that was playing out right there, at the other end of his sister's body -- would make him blow his load pretty much instantly if he dared to go any faster. This was beyond even the hottest erotic dreams that the teenager ever had. For a boy who had been a virgin less than a week ago, this straight-up pornographic, incestuous threesome felt like once-in-a-lifetime experience.

He refused to believe this just the first one of many, many more!

"Ooooooh! Yes!... Yes, yes, yes, yeeeeees!" his mother chanted, grinding her engorged clit against Katie's face that was buried between her thick thighs. "Aaaah! Don't stop! Oh god! Right... right there... EEEEEIIIIH!"

The sexually awakened MILF was emitting a whole spectrum of lurid noises, from quiet whimpers to loud, almost savage groans. Her daughter was playing her quivering pussy like an intricate wind instrument, each flap of the tongue producing a different yelp or moan from the straining throat of the wanton mother. Ethan's fierce grunts, though loud and raw, were merely a background track to Linda's aria of carnal pleasure.

"Fuck, this is so hot," he managed, as he bottomed-out inside Katie's pussy yet again. His bloated balls were close to fully loaded with another potent payload, and he was about to spray it wherever his women wanted him to. "I'm gonna blow soon! Sis...? Mom!... Where... where do you want it?"

"On meeee!" his mom wailed, barely holding on as a wave of sensual bliss washed over her almost exhausted body. "Cum all over me, Ethan! And on your sister, too! Just... cover us in your cum!"

Amazed at his mother's transformation into a shameless cumslut, Ethan was more than happy to listen to Mom. Feeling the surge of spunk rushing through his engorged cock, he pulled out of his sister's wet hole and aimed the spout of his firehose at her chest.

He roared when the first volley shot out of his pulsing shaft, splashing against Katie's smooth neck and her firm, heaving boobs. The next salvo went higher, hitting his mom's large and shaky butt. For the rest of his massive discharge, he went back and forth between both women, spraying many volleys of teenage jizz all over his mother and sister. The orgasm was so intense that it totally sapped his strength; he fell forward, bouncing off of Katie's thighs that he had slung over his shoulders. He finally rolled to the side, panting heavily as he lay on his back and allowed his racing heart to gradually calm down.

Linda had collapsed, too. She'd been overwhelmed by the final climax that her daughter gave her, amid the veritable rain of cum that her son precipitated upon their writhing bodies. Only Katie still had most of her wits about her, laying limp on her back and staring at the ceiling, gobs of Linda's pussy juice still smeared all over her face.

"Holy shit..." she whispered, and a huge smile appeared on her lips.

***

By the time the weekend was done, the entire incestuous family had gone through a veritable whirlwind of sex.

After the incredibly hot three-way romp on Friday -- a followup to the immensely successful revival of their movie nights -- Linda let the horny teenagers sleep with her in her own bedroom. In the morning, the siblings took advantage of this and were very quick to instigate another wild threesome with their mom.

This time, it was Ethan who got some much needed practice in eating out his voluptuous mother. She was sitting on his face and moaning in joy, while Katie rode his stiff wood and goaded Mom to make out with her daughter. Linda didn't have to be told twice, and she very much enjoyed the young girl's lithe body as it pressed against her own, more curvaceous one. Their delightful purrs and moans were making it a real challenge for the lucky boy underneath them to focus on the task of orally pleasuring his mom's pussy.

Still, he had done a very respectable job. It wasn't long before Linda cried out in a powerful orgasm, just as Ethan sprayed her daughter's pussy with his thick semen.

They later went for a quick shower and eventually returned to Linda's spacious bedroom, the siblings being quite eager to take their sexual exploration even further. The thoroughly satisfied mother wasn't as keen, though she was still amazed not only at the intensity of her children's lurid activities but also the ease with which they had drawn her into their erotic wonderland.

"You kids go off!" she playfully shooed them out of her bedroom. "I'll make myself decent, and make us a really large breakfast..."

"Uhm, Mom," said Katie, "now that we're all having sex, why don't you join us in this, too?"--she waved her hand about the nude forms of herself and her brother--"If you stay naked like us, then we can enjoy each other any time we want to."

Mom chuckled. "Honey, after today and especially yesterday, I couldn't possibly want to fuck you again so soon!"

"Oh, but you only think so now!" Katie said with a chuckle. "I'm pretty sure that once you do this, you're gonna find yourself just naturally more horny, like us!"

"Really? Is that how it works?"

Katie shrugged. "I mean, it does make sense that your body would open itself to the possibility of sex at any time," she reasoned. "Like, if Ethan can just take me any time he feels like it, then my pussy *needs* to stay wet for him, and it does! I can't see why the same thing wouldn't happen to you, Mom."

Linda shook her head in amusement, and laughed. "Okay, I suppose there is some logic in there. Guess I'll try it then, at least for today, and we'll see what happens," she said, dropping the towel that covered her and exposing her gloriously nude, voluptuous body. "There!... Now, since I'm skipping the 'getting decent' part, I'll just go make some food, alright?"

And with that, she sashayed out of the bedroom, her wide hips swaying enticingly. Ethan obviously found the sight enthralling, and it distracted him long enough for Katie to sneak up on him, push him onto their mom's bed, and mount his rock-hard cock again.

Wisely, the siblings gave Mom some space after their (nude) breakfast, though of course their incessant fucking continued unabated. Listening to her kids copulate upstairs like a pair of animals in heat, it didn't take long for Linda to feel an itch between her legs once more. She had an unpleasant flashback to her recent experiences of sexual frustration, so she decided to act on her urges right away.

And so, after lunch, they had another threesome.

And then one more after dinner.

On Sunday, following yet another menage-a-trios in her bed, every muscle in Linda's body was screaming from the physical effort. But rather than take it as a sign that she should perhaps slow down, Linda figured she could "rest" by spending most of the day on her back. She let her son and daughter use her body but only in gentle ways, with Ethan having a cozy, languid session with his mom in the missionary position.

Linda had to admit: her daughter was absolutely right. Going nude, and making her body sexually available to her kids at all times, had supercharged her libido to straight-up dangerous levels. On Monday, she dreaded going back to work like this, but she feared that excusing herself into her home office would only make it harder to go through the necessary adjustment period. Linda had quickly realized that she now had to balance her professional life against the urgent demands of her skyrocketing sex drive.

That first day was incredibly challenging, as she had to visit the bathroom about once every hour to relieve the ache in her overheated pussy. It wasn't until she came back home that Linda finally felt comfortable again, with every piece of her clothing promptly discarded, as she practically ran upstairs to impale herself upon her son's huge, unyielding hard-on.

It took her about a week before he learned to cope with her nigh-uncontrollable horniness at work.

In the morning, she would have Ethan and Katie focus mainly on her, kickstarting her day with multiple earth-shaking orgasms. Along with a vibrator always buzzing in her dripping snatch plus a strategic choice of wardrobe, this allowed Linda to concentrate on writing code while in the office, at least to a passable degree. All day long, however, she would look forward to the incestuous romps they'd have once she returned home.

In light of these development, Linda thought, she would probably need to reevaluate her career choices...

***

With a fierce grunt, Ethan let loose inside his mom's piping hot snatch. He erupted with several volleys of his dense cum and coated her womb thoroughly, then yanked his spurting cock and scooted up the squirming mother's body. He aimed the final salvos at her bountiful breasts, covering them in a thick layer of spunk, as she moaned in delight at her virile son glazing her with hot semen. Moving further up, he presented his dripping cum-cannon to Mom for cleaning, which she did immediately, inhaling it with great gusto.

"Mmm, delicious as always," she purred and giggled. "I just can't get enough of my son's tasty treats!"

"I should have more for you very soon, Mom," he said with a grin. "All you have to do is keep licking it like this..."

Ethan loved to have Mom in the house on a permanent basis. Several days ago, she switched from her old job to a different, fully remote position, that enabled her to stay home and take much better care of her kids.

Since then, the horny boy had been a constant, albeit very welcome nuisance to his mother. She was tempting her with his huge boner, just as she was trying to familiarize herself with the complicated production setup at her new company. Most of the time she would relent, letting him spear her wet slit with his dick while she struggled to maintain focus on the task at hand.

Yet, ironically, Ethan's rock-hard cock could be said to make Linda *more* effective at her job, not less. She could now solve many problems using maybe the fifth of her usual brainpower, with the rest devoted to enjoying the carnal sensations of her son slamming relentlessly into her juicy cunt!
She remembered that one time her phone buzzed at 3 am, rousing her from a tangle of limbs that she and her kids had collapsed into after their final romp in her bed. Ethan had woken up, too, and he quietly followed Mom to the living room, where she opened her laptop and started investigating the root cause of the alert.

As she lay on the couch on her stomach, with the curve of her scrumptious ass softly illuminated by the computer screen set to low brightness, it was really only a matter of time before her son would take advantage. He did just that, of course, by pushing his large, freshly hardened dick into her instantly lubricated pussy; it elicited only a weak protest from his surprised mom.

Unable, and in all honesty unwilling to repel her son's invasion, Linda spent the next half an hour diagnosing and then fixing the misconfiguration that caused the outage. Meanwhile Ethan was right behind her, enthusiastically plowing through his mom's hot, tight, dripping wet hole.

"Brotheeeer," Katie drawled, back in the present, as she slowly pushed the (formerly Mom's) dildo into her snatch and fucked herself with it in the absence of her brother's cock. "What about meeeee? Why don't you fuck *my* pussy now, and have Mom just swallow your next load?"

Ethan chuckled, loving how his sister's horny mind worked. His dick was clean now, so he crawled to where she had been sitting on his bed, kissing her deeply as he pulled the fake penis from her stretched orifice. Moments later, the void he created was already filled with his big, still-rigid cock.

This was how every day looked for Ethan now. For the past month or so, the bulk of his time was divided between fucking his insatiable sister Katie, fucking his nympho mother Linda, and also fucking them both together. In this short time, the boy's life had made a complete U-turn, as he went from being a sexless virgin to having multiple wild threesomes with his insatiable family every single day.

Thanks to his out-of-control teenage hormones, as well as the intensely erotic atmosphere that permeated their family home, he had no real issues keeping up with the demand. In the presence of two gorgeous women in his family, who remained naked and available to him at all times, Ethan found himself sporting nearly permanent boner, his 10" cock always ready to satisfy their boundless cravings. His workout regimen proved to be very helpful here, as he was now fit enough to fuck his horny sluts for hours.

"Ah, so good..." his mom moaned, scooping up the plentiful seed that he had deposited over her round breasts and putting it all in her hungry mouth. Her gaze then wandered to the incestuous couple, mating less than two feet away from their mother, and she chuckled. "You two can't be serious! Again?!"

Katie only moaned in response, and Linda couldn't help but laugh.

***

The sun was setting on their secluded backyard, earlier and earlier with each passing day. Long rays were bringing forth, and enhancing, all the natural shades of orange and bronze. Included in this was the beautifully bronzed skin of Ethan's sister Katie, not a single tan line on her sleek, nubile body.

"I can't believe how much you have grown and changed," her mom said wistfully, looking at her naked kids who lay on the lounge chair next to hers. "This has been a very memorable summer indeed..."

More precisely, it was Ethan who lay directly on the chair, with Katie lying on top of him and being spooned by her notably more muscular brother. His hands were wandering between her ample breasts, flat and toned tummy, and her glistening, engorged labia. The siblings were joined by Ethan's wide cock, throbbing steadily as it sat inside the silky depths of his sister's wet pussy.

"You're right, Mom" Katie said with a sigh, wordlessly asking her brother to contain his urges for a moment. "I had no idea that time could go by so quickly, but it's true: the summer is almost over..."

Linda gave an amused chuckle. "Yeah, it sure does fly when you're fucking your brother for god knows how many hours a day!"

"Sheesh! Pot and kettle, Mom," her daughter retorted, rolling her eyes and laughing.

"Right, right, guilty as charged," Linda said with smirk. "What can I say? A man like Ethan is pretty hard to find."

"But at least he's hard when you *do* find him," Katie quipped with a laugh, making her brother groan as she visibly tensed to squeeze his shaft with her pussy muscles. "Yup, still up and ready! What are you feeding him, Mom?"

Linda snorted a laugh, too. "I think it's mostly your fault, Katie. You turned us all into some kind of incestuous sex maniacs! I'm not really complaining, of course, but we have to get a hold of ourselves soon, or decide how are we going to deal with this long term," she said, looking meaningfully at her daughter. "Especially you, darling..."

She blinked. "Why? What about me, Mom?"

"Well, you still need to decide whether or not you are going back on campus."

The girl's eyes went wide like saucers. "What? Are you saying that there is a choice to be made here?"

"Sweetie, I know I've been whacking you over the head with how important I think education is, but maybe you shouldn't take it as gospel," Linda said, her face lighting up in a warm smile and fully capturing her daughter's full attention. "Life always happens; and when it does, we all have to adapt. It's obvious to me, for example, that you'd rather stay close to your brother than live a thousand miles away, so perhaps you can figure out how to make it all work..."

"Yes please, Mom," Ethan chimed in, feeling his hard cock perk up and twitch. "I would love to have Katie around!"

"Oh, I'm sure you would, honey," his mother teased him. "Why settle for just one horny woman, who's ready to take your cock insider her at a moment's notice, when you could have two of them instead?"

A shocked gasp escaped Ethan's throat, but the expression on his face was hopeful. Could he really keep Katie around, too? He already got Mom... In fact, it was precisely because of his mother that he had slightly changed his post-graduation plans.

The change wasn't significant, because Ethan was under no delusions that his grades would grant him access to a prestigious university. He had already been admitted to the local community college, and he had no compelling reasons to reconsider this decision now. What he did change, however, was the exact curriculum of his courses. He switched some of them around, dropping some unimportant ones and leaving only those that he would be able to attend fully remotely.

It was really a no-brainer, considering that his mom had already switched to working from home weeks ago. Ethan wanted to be a good mamma's boy, and to keep her company in the best way possible: by sticking his hard dick inside her needy pussy whenever she'd tell him to!

"I... I do want to stay close to Ethan," Katie admitted, glancing up her brother's chin, "and to you, Mom. Because I love you both, and I'm still horny enough to want to fuck you silly!"

"Oh, do tell me about it, sweetie," Linda said, a little ruefully but with a clear note of mischievous satisfaction in her voice. "This summer had us spiral totally out of control, and it seems like a lot of this craziness will remain with us for good. And you know what? Maybe that's not really a bad thing..."

"As far as I'm concerned," Ethan said, groping his sister's body shamelessly, "that is not a bad thing at all!"

The two women burst into gleeful laughter, their exposed breasts jiggling enticingly. The vibrations from Katie's giggles were sending delightful shivers down the boy's swollen cock.

"Okay, but seriously," Katie began, once they both calmed down a little, "if I could do it like Ethan and take all my classes online... I mean, it should be possible these days, right? Then I could just stay home with both of you."

"Sure, that would work," Linda said, then added teasingly, "but wouldn't you be missing all these cute boys that you could meet on the campus?"

"No way," Katie immediately disagreed. "None of the guys there could ever compare to Ethan!"

Her brother beamed a cheeky smile, and his cock twitched within Katie's hot canal.

"Well, well, who would've thought?" her mom mused. "My cock-crazy daughter speaks like she has found someone truly special..."

Katie rolled her eyes again, giggling. "Mom! I told you that Ethan is just my, you know -- brother with benefits."

"Alright, whatever you say, sweetie," her mom conceded with a chuckle, languidly stretching in the lounge chair and sighing in contentment. "In any case, it looks to me like you know exactly what you want. And honestly? I'm glad. I think your brother would've been too much for me, even with my current, ahem, appetite..."

"Oh, don't worry, Mom," Katie reassured her, smirking as she sat up on her brother's hard dick. "Between you and me, Ethan should have enough on his plate to occupy most of his free time. I know that I'm definitely going to jump on his cock every chance I get!"

"Yes, kids, but remember," Linda switched to a motherly tone, raising her finger for attention. Even totally nude, she still managed to command respect among her children, irrespective of all the sexy things they wanted to do to her voluptuous body. "Study first, then fuck! As long as you stay in my house, these are the rules."

The siblings burst out laughing, as they showed her thumbs-up and nodded. Satisfied and rather amused, Linda put her sunglasses back on and picked up the iPad to continue reading some steamy romance novella she had found on the internet. It wasn't long before her hand traveled to her nether regions, a finger or two working itself inside her moist pussy.

Ethan watched her for a moment, until his sister once again started riding and bouncing on his massive hard-on. As he got more and more into it, fucking her right next to their mother, he couldn't help but wonder how correct Katie had been.

Their mom was just *really* cool!