Stuck Inside My Sister

Implausible accident puts siblings in a precarious position.

This post will be/is/was to celebrate me reaching over 10,000 followers on Lit! My sincerest and most effusive appreciation to everyone who has been a part of this incredible journey. I'm beyond honored and humbled by your support.

I can think of no better way to celebrate this moment than with another very silly, sibcest story. As most of you are aware, I have a history of writing particularly dumb stuff. This is definitely one of those. Suspend all disbelief, ye who enter here.

I realize that none of what I'm about to tell you makes sense. Every iota of understanding I have about life, the world, and even human biology tells me there's no way this could have happened. But I swear that it did.

I was enjoying a lazy Monday morning. I'd spent the weekend home from the dorms to enjoy the standard 'free meals and laundry weekend.' I'd slept in because I was at an age (twenty-one years old, if you must know) where anything before 10am felt absolutely ungodly. The house was quiet in a sleepy, post-morning-rush kind of way.

It would have been a perfectly boring day, except I made one, seemingly benign, decision that would lead to disaster: I took a shower.

In his book, Outliers, Malcolm Gladwell wrote about how massive accidents happen. Rather than one catastrophic error, these calamities are caused by a confluence of smaller mistakes. What happened to me that day is an excellent example of this theory in action.

Error One: Despite the fact that it was already late morning, bright sun streaming through the windows, I was spacey from sleep and unaware of my surroundings. So, I didn't notice the lack of towels hanging in the bathroom. Instead, I turned on the water, got in, and luxuriated in the wet heat. I had at least an hour before I needed to head back to campus for class, and I took my time.

I'd never been athletic growing up and it had given me a certain amount of softness. Especially around the belly. But in college I'd befriended a couple student-athletes who'd shown me the way of better body care. I wasn't some shredded, swole, dude-bro, but better eating habits and a reasonable gym routine had left me in fairly good shape.

So, it was nice to look down in the shower that day and see defined biceps, strong pecs, and a flat stomach. I'd worked hard to get there, and I was proud of what I'd accomplished. My relatively recently acquired college girlfriend sure seemed appreciative of my efforts, as well.

After I shampooed my short brown hair, I took a razor to my face (never underestimate the benefits of a shower shave) and cleaned that up, as well. Finally satisfied (and a little overheated from the steamy water), I switched off the tap, opened the glass door, and reached for the non-existent towel.

Error Two: I'd actually made this mistake before the first one, but I hadn't realized it at the time. Like I said, the house was quite quiet when I woke up and so I assumed I had the place to myself. Not an unreasonable assumption. Both my parents worked and my younger sister, like me, had college classes that day.

So, rather than try to cover myself in some way, I simply stepped out of the bathroom, naked and dripping, to go and find myself a towel from the linen closet in the hall.

Which is when I realized that actually, no, I wasn't home alone at all.

As soon as I opened the bathroom door, I was made embarrassingly aware of my error. Standing in front of me, staring at my naked body with a look of undisguised surprise, was my younger sister, Madison.

Maddy was a girlish twenty (versus my far more mature twenty-one). Unlike me, she'd been an athlete all her life, a gymnast, and she still had the body for it. My sister was barely five feet tall and petite from her fingers to her toes. With a slightly upturned, freckled nose, sharp chin and huge blue eyes, her face could best be described as elfin. Madison kept her long, golden blonde hair tied back in an epic braid that ran all the way down to the small of her back.

In another flaw that we'd yet to realize the consequences of, Madison was also waking up. She had on a dark red t-shirt (a boyfriend's or maybe one of mine that she'd liberated, I wasn't sure) that hung down to about mid-thigh.

"Aiden!" Maddy shouted. Her hands flew up to her chest like she had to catch her heart before it flew right out of her ribcage.

Error Three: This wasn't so much a mistake as it was an unfortunate circumstance. Our house was built in the 1930s and the only way to get up to the attic was via a ladder that could be pulled down from a pocket door built into the ceiling.

In high school, as a gift to my sister for winning a local gymnastics competition, my parents had finished the attic and made it into a cute, loft bedroom for her. It was actually a pretty neat space and super private. But one of the reasons I'd never been jealous about it (beyond the fact that I got the larger bedroom) was that they'd never bothered replacing the ladder system. So, my sister had a unique experience of climbing into and out of her room every day.

It just so happened that, as I stepped out of the bathroom naked, my poor, shocked, little sister was halfway down the ladder. And when her hands went to her chest, she fell backward.

I reacted on instinct. Things like clothing, or the state of our bodies, or other key details didn't occur. I knew I had to catch my little Madison, or she was going to crack open her skull on the hardwood, hallway floor.

Madison tipped backward. I raced forward.

Much like my sister and I in that moment, our remaining blunders all tumbled on top of one another. Despite the fact that she'd been turned in the other direction on the ladder, Madison fell facing me. My sister was light, but her momentum surprised me and, as I grabbed her, we both tipped backward.

My sister wasn't wearing underwear.

I had an erection.

As we hit the ground, we both had a tremendously unlikely alignment of our complimentary organs. And, as Malcolm Gladwell posited, it all dominoed to create the disaster. We landed with a wet (remember I was still soaked from the shower) thump.

We didn't notice it at first. Well, I didn't anyway. Our bodies bounced onto the ground and both of us gasped as the air was forced out of our lungs. Madison had fallen on top of me, and I wrapped my arms around her to try to stop her fall. I felt her body collapse into mine.

I looked to see if Madison was OK and found my baby sister staring down at me with big, liquid blue eyes.

"I've got you," I said, stating the obvious.

"Aiden," she said my name again. This time the word was shrouded in a deep, throaty groan. "Oh my God."

"What's wrong?" I asked.

My sister was staring at me with such horror that, stupidly, I thought maybe I'd broken a bone in the fall or was bleeding from somewhere. Disaster protocol kicked in, and my body parts all started reporting into my brain that they felt intact.

Madison leaned forward. And that's the moment when that very key part of me finally checked in to let me know about its surprising situation. My penis, my dick -- my epically, inexplicably, erect cock -- finally registered that it was buried to the hilt in something warm, wet, and wonderful.

By some phenomenon of physics. By some beneficence of biology. By some felicitous, fortuitous, and fantastically stupid stroke of serendipity, I'd penetrated my sister in one shot.

Holy fuck!

"I'm inside you?!" I shouted it so loud that it echoed down the hall. "How in the hell am I inside you!?"

"I don't fucking know but you very much fucking are!" Madison yelled back.

She was sitting on top of me, legs straddling my waist. The perfect picture of the cowgirl position, achieved completely by accident.

"Oh Madison! Maddy! My little MadMonkey, I'm so sorry. How did this even happen?!"

"I don't know."

Madison, clearly distraught, lifted up her shirt to reveal her naked, pink pussy now stuffed full of brother-cock. Our intimate connection was undeniable. Her teeny, tight, twat (with just a bit of blonde pubic hair) was being split by my ruddy, thick dick. It would have looked incredible if it wasn't for the horror of the moment.

I tried to piece it all together, as if the puzzle hadn't already, irrevocably, fallen into place. "When you fell -- when I caught you -- we must've, like, lined up."

"Why the fuck did you have a boner?" Madison asked.

"Why the fuck weren't you wearing underwear?" I asked, "And wait, why were you fucking wet?"

Both of us seemed to be saying the eff-word a lot. Probably because we were actually fucking. So, the expression seemed appropriate. Also, I think we were both in a bit of shock. Our situation was so unlikely, it was hard for either of us to rationalize our reality without a whole lot of cursing.

My traitorous dick pulsed.

"Aiden, what the hell are you doing?!" Madison asked, staring incredulously at our incestuous connection.

"You feel really good." It came out as a mumble.

"I what?!"

"It's not my fault!"

"Well, you need to remind that huge, thick dong of yours that it's in your sister," Maddy said.

"And you need to tell your tight, soaking twat that it's clasping your brother's cock!"

We both glowered at each other, rage rising off of us like steam. Then burst into laughter.

Before that morning, Madison and I had a typical sibling relationship. Not crazy close but never distinctly distant, either. There were times where I felt like my sister was a companion and others where I wanted to stab her. Standard sib stuff.

And yet, there we were, brother-p in sister-v. So, we processed that discordance the only way we knew how: by laughing hysterically. I'd argue it was actually the most reasonable reaction. Healthy, honestly.

"Seriously, MadMonkey," I said, using my pet name for my sister as I wiped the mirthful tears from my eyes. "I am so sorry."

"It's OK, GatorAid," Madison said, using her own childhood appellation for me. "I know it's weird. But in some ways, I'm kind of grateful." She raised her palms in a clear double-stop symbol. "Not about this. Definitely not. But you were trying to save me. This is just something stupid that happened. It's fine. We're fine."

An unanticipated relief washed over me. What had happened was so bad, but it should have been way worse, and I'd been worrying about the whole thing more than I was aware. "Thanks. I don't think I could forgive myself if I screwed up our relationship."

"Really? Screwed up? That's how you want to describe this?"

We started cackling all over again. Is it weird that I was proud of us? This moment could have been so miserable. Instead, it was something we might eventually have fond, funny memories of. OK, probably not.

But I want to pause here. Because, to this point, I'm sure you're dubious about all of this, but maybe not in complete disbelief. After all, there are plenty of stories out there where a woman (usually a blood relative) accidentally plants herself on a penis (or plants a penis in herself? I don't know the correct terminology). And I think that while we can all agree it's extremely unlikely, the scenario has achieved a kind of fictional plausibility (like bigfoot or aliens or even sibling incest, itself) where we're all willing to accept that it's a thing that might possibly happen, despite how overtly unlikely it actually is.

So, if you're already raising a doubtful eyebrow, I want to make it clear that we haven't even reached the unbelievable part of my experience yet. For all the fantastic nature of what had occurred so far, compared to what we were about to discover, this was all relatively (pun intended!) reasonable.

Meanwhile, back in the hallway of our parents' home, Madison's pussy was flexing around my dick in a most delicious way as we giggled at our shared predicament. It was a very pressing reminder of the fact that, while we were taking this in stride, I remained buried to the balls inside my little sister's gripping, slippery pussy. Madison seemed to notice it too; that her brother's girthy, iron hard cock continued to poke and stretch at her forbidden depths.

"OK, well this has been fun and all," Madison said, "But I think I'm ready to stop fucking my brother and move on with my day."

"Beyond a good idea," I said.

My baby sister put her hands on either side of my flank and pushed up with her knees. I felt the heat of her slowly retreat from my dick. Then stop. She slid back down, making an odd, pained moan.

"Um, Maddy, dearest," I said, "Moving up and down isn't solving this. It's actually remarkably close to the opposite of what we agreed to stop doing."

"Shut up, Aiden," Madison said. A bit of a growl in her voice. "Just... hang on."

She lifted herself again, reached about the same point, stopped, then slid back down with an anguished groan.

"Mads?"

"Shut up shut up shut up! Let me concentrate for a second."'

My sister bit her lower lip, adorably. She twisted and turned as well as she could while still impaled on my member. Like my dick was a jammed bolt and her pussy was the wrench. Madison lifted up again, then stopped and started undulating. Left and right, up and down. I know this sounds a lot like sex, but it didn't feel pleasant at all -- more like she was trying to twist my dick off.

Finally, Madison jerked herself up sharply. Face strained. Now it felt like she was trying to rip my dick out by the root. Not exactly an improvement in the sensation.

Right when I was going to stop her, Madison screamed, a primal cry of frustrated pain, and fell forward. My dick went *schllluuuuup* all the way back into her sweet, syrupy pussy.

"God-fucking-dammit!"

"What the hell are you doing?" I asked.

"It's stuck," Madison said.

"Bullshit," I said, "That's- There's no fucking way."

"I agree it's complete nonsense, but you'll have to explain that to your stupid penis because it's like, wedged up there or something."

I gave my sister the most doubting look I could muster. "I mean, I guess I could see it if you were like, really dry or whatever. But I can feel you're soaked as all get out."

"Thanks for the reminder," Madison said, "Don't forget you're also as hard as a steel rod, you dirty sisterfucker."

"I didn't mean it that way," I said, "Seriously, no judgment implied. We're both culpable here."

Madison crossed her arms and glared down at me. It was clear who she thought was at fault. And her patience, like her pussy, had reached the limit of its plasticity.

"I'm trying to figure this out," I said, "Because there's no way this is actually happening."

"You try it, then" Madison said, "Oh great master of the vaginal arts."

I pushed at my sister's hips. Again, her pussy began to relinquish my cock. Madison's hands tightened on my sides. I felt a kind of pressure around my dick, like something was cinching around it, so I pushed harder.

"OW OW OW OW! Stop!"

I let my sister drop back of her own accord. *Schllluuuup* went my penis as it slid back into its now-familiar position.

"See, I told you," Madison said, "You're stuck inside me."

The reality of where we were, what we must look like, entered my mind. Both siblings lying in the hallway, soaked in shower water, sweat, plus some other bodily stuff. Connected in a most sexual way and screaming at each other. We must have made quite a sight, which made me oh-so-glad that no one could actually see us.

"I'm so confused," I said, "It's a vagina not, I dunno, complicated duct work. Your body is literally designed to let my penis go in and out."

"Yes, thanks for taking me through all that, professor," Madison said, "It's ever so helpful. By all means, please continue to mansplain my own pussy to me."

"Well, if you're so smart about it, why is my dick still in there?"

"I don't fucking know!"

"Well, has this happened before?" I asked.

"I think I'd remember if it did," Madison said, "I'm not exactly in the habit of sticking things up in there!"

Something about the way she said it made me pause. "Waitaminute, Maddy. Are you a virgin?"

"Not anymore!"

My heart sank into my stomach. I looked up at my little sister's face. Her big blue eyes and cute smile. I'd always thought she was adorable. And now.

I put my hand on her arm, trying to be comforting. This was bad enough already, but realizing it was also my little sister's first time -- that I'd taken something irreplaceable from her -- made it all the more terrible.

"It's OK," Madison said, "It's fine. Honestly, I wasn't even going to count it."

"That makes sense," I said, "But this is seriously weird. You need to see your gynecologist or whatever."

"How do we know it isn't your strange, freakish dick that got itself lodged in me?"

"Because I've been with women before and this has never happened," I said.

"Really, Gator, is now the time to bring up your many conquests?"

"That's not-"

"Geez, who knew you became such a huge manslut in college?" Madison shook her head with disdain, a sparkle of sibling playfulness in her eyes.

"I haven't been with that many women, OK?"

"Whatever," Madison said.

"I'm not some dude-whore or whatever you called me."

This sibling bickering was very much on point, but it wasn't getting us anywhere. I glared up at my sister. Madison glowered back. Then her face quirked, like she was thinking.

"Maybe that's the problem. The fact that we're brother and sister. Like, our bodies are so..."

"Compatible?"

"I was going to say incompatible, you perv!"

That raised another factor, one I wasn't ready to admit to my sister. Or even, truly, to myself.

Madison had let the red shirt hang back down, but I caught little glimpses of her puffy, pink labia split around my aching, swollen shaft. I could also catch the slight swell of my sister's small breasts under her shirt. And even now -- with Madison looking at me for all the world like I was the most objectionable being on the planet -- I had to concede she was so pretty. Her innocent face, freckled nose, and thin coral lips. It was all enough stimulation for me to think that I might succumb and...

"Maddy, I think I've figured it out," I said.

"Oh, thank God," Madison said.

OK, my feelings were a little hurt that my sister sounded so relieved she no longer had to ride my dick. But I decided to let it go. This was a stressful situation for both of us.

"It's easy," I said, "All I have to do is cum. Then my dick will get soft and slip out."

"Aiden no!" My little sister's face filled with horror. "You can't do that!"

"Um, hate to break this to you, Mads, but I very much can."

"Seriously?!" My sister spluttered. "It's so wrong!"

"I won't even acknowledge that it's with you," I said, "I'll think about Kelly the whole time."

Madison cocked her head at me.

"Kelly's my girlfriend," I said.

"Oh right," Madison said, and her face softened to a look of genuine concern. "I didn't think about it till now, but I guess you're kinda cheating on her right now. That sucks."

"It's OK," I said, "Honestly, I wasn't even going to count it."

"That makes sense," Madison said.

"What about you? Are you, um, seeing anyone right now?" I asked.

"Is this really the best time to catch up on my relationship status?"

"I wanted to make sure you weren't also, you know. Cheating."

"Well, if you must know, I'm actually between boyfriends right now," Madison said.

"That's good," I said, "Sorta. Any reason why?"

"I've been so busy with college and classes. Being a freshman in a new place is so overwhelming and I... OK, maybe we save this talk for later?"

"Yes, good idea," I said.

"In any case, you need to come up with another solution because cumming in me isn't an option."

"You'd really rather be stuck like this for hours instead of enduring a few seconds of..."

"A few seconds!?"

"Shut up," I said.

"I feel so bad for Karen."

"Shut up! And her name is Kelly. All I'm saying is, it'll be awkward for like, a little bit. As quick as I can make it. But then my dick will shrink, and we'll be free. I get that it'll be weird, but, honestly, I don't see what the problem is."

"You don't see the problems," Madison said. Her snarl would have been way more intimidating if she wasn't currently impaled on my pole. "That's right, problemS. Plural. First, if you cum in me, that means we really did have sex and I lost my virginity to my brother, and you cheated on your girlfriend with your sister."

"I thought we both agreed that it wouldn't count," I said, feebly.

Madison shook her head, like I was a sad, innocent fool. "Second, nutting inside your baby sis is definitely, completely, one-hundred-percent incest and that is not happening."

"I'm sorry Maddy, but the truth is we've already achieved incesthood," I said, "We're full on incesting right now. A little more isn't going to make it any incestier."

"Please stop saying that word," Madison said, "You're not even conjugating it correctly."

"We have crossed the Incest-issippi. Breached the sacred borders of Incestua. Leapt headfirst into the Incestic Ocean."

"I get it!" Madison said, "Fine. Incest gets the win-cest, lucky us. But that's not even my biggest problem."

"OK," I said, "So what is?"

My sister's face softened. She picked up my hand and held it. Weirdly, it felt more intimate than having my dick so deeply placed inside my sister.

"I'm not trying to be hurtful, I swear," Madison said, sweetly, "But the thought of having your wriggling, wiggling, bro-spermies slithering all around inside me? It really icks me out. And it's not just the thought that they're in there, you know? I'll be walking around for days with your slippery stuff leaking out of me. My sibling's own, sticky semen dripping down my legs."

Madison let out a little involuntary shiver.

I had to concede on that one. I was the lucky one in that way -- making the deposit rather than receiving it. If Maddy found that thought upsetting there wasn't anything I could say to argue her out of it.

"But also?" Madison sucked in a deep breath, like she did when she was about to start a big gymnastics routine. The next words came out like a whisper. "I'm not safe."

"Wait, what!?"

But my sister kept rambling in that soft voice. Like she was talking to herself. "Like, at all. In fact, if my app is right, I'm actually really completely totally fertile right now. Ovulating all the way. Right this second. Which would explain maybe why I was so lubricated, and you slipped right in. Because my body thinks it's baby time."

"Madison, I don't understand," I said, "You're not on the pill or an IUD or whatever?"

"Not that it's any of your business," Madison said, primly, "But I read a bunch of stuff about how the hormones can mess you up. And it's not like I was having sex, anyway. Well, until now."

"But I mean, eventually, you were planning to. Right?"

"I figured I'd use condoms," Madison said, "Or whatever. Look, it hardly matters. The only thing that counts is that this is the absolute worst time for sperm to get anywhere near my body. Let alone my brother's intrepid little incestuous babymakers."

"You know that's not how it works," I trailed off for a moment. "Like, even if I don't, um, ejaculate. There's probably a bunch that's already leaking into..."

"Well aware, Gator," Madison said, "But there's a difference between what might actually happen out of our control and full on surrendering to the insanity of letting my own brother inseminate me. Understood?"

"Madison..."

"Under. Stood?"

"Understood," I said, "You're right, of course. But in the meantime, we need a solution and we're not getting any less stuck."

"Well aware," Madison said, "So we're going to deal with this like any other serious medical issue."

"Google it?"

"Exactly."

*

Madison's phone was up the ladder in the attic and, therefore, unattainable. Mine, however, was down the hall in my bedroom. So that was an easy decision.

Look, I'm not going to lie here. There was a part of me that thought my sister might be pretending. I mean, who gets a penis stuck in their vagina? The idea that Madison was messing with me seemed way more believable. But as we started to reposition ourselves to try to get back to my bedroom, it became quite clear that Madison wasn't faking this literal fuckup.

We started by trying to slide ourselves down the floor, but friction is a bitch. So instead, we agreed that the best way to go forward was to stand and walk. This turned into a complicated and almost dangerous contortion act as we tried to make each other move in very precise, unnatural ways while also not snapping my cock off in my sister's cunt.

First, I did my best to slide into a sitting position. This had the unfortunate consequence of shoving my sister's tiny tits in my face. Fortunately, they were covered by a t-shirt. But I could see her nipples pressing through the cloth. And at this point I couldn't help but be curious about that aspect of her anatomy.

I had always been a boob man. My girlfriend, Kelly, was stacked, and I loved that about her. But the allure of Madison's little titties was starting to change my mind about my particular size preferences.

I forced myself to focus. The next step was to stand. I put my hands under my baby sister's butt. That was another lovely discovery. Like I said, Madison had done gymnastics all the way through high school, competing on the state level and everything. So, objectively, I was aware that she probably had a tight backside. But what my fingers and palms now found was enough to convert me from boobs to butts. Sweet Lord Above, did my sister have a great ass.

Madison must have noticed I'd moved from functional to fondling because she cleared her throat and gestured with her chin.

"Right," I said, "Back to it."

Bending my knees and, using the wall for leverage, I shoved us upwards. It wasn't a clean stand, but it was a start. A couple more stumbling shimmies against the wall got me up on my feet, holding my sister in place at my waist. Madison wrapped her arms around my neck. Closed her legs against my back.

This was difficult for sure, but it wasn't as bad as I'd anticipated. All that exercise I'd been doing was paying off. Plus, like I said, my sister was tiny. And she was both quite flexible and particularly strong. Competed at the state level, remember? Madison was holding herself up as much as I was carrying her.

I took a tentative first step down the hallway towards my bedroom. Actually, this wasn't hard at all. I wasn't going to run a marathon like this, but walking was almost easy.

No, the biggest problem, I realized, was something neither of us had anticipated.

See, up to this point the fact that I was buried in my sister's incredible pussy had been kind of a theoretical fact. Oh, I felt it for sure. But we'd been caught up in the details of what had happened. And it's not like we were moving at all. After the initial insertion it was more of a dull sensation than anything else.

But now that we were walking -- my sister's lithe body clinging to me, her sweet virginal pussy clutching at my cock, the vexed expressions on her pretty face -- I was suddenly very aware that there are a tremendous number of nerve endings on the male genitalia. And they were all firing off like crazy.

Madison's speech about her fertility, ironically, wasn't helping things either. I did not want to get my little sister pregnant. Just thinking about how angry she'd be if I lost my load in her depths should have been enough to slow my roll. But you know what they say about pink elephants.

Adding to it, like a feedback loop, was the fact that my sister seemed to be experiencing the same exquisite sensations. Even though her orgasm didn't come with the same consequences, she'd made her feelings clear on the matter -- cumming on her brother's cock was something that she very much did not want to experience.

But that didn't mean her body was on the same page. With every step, with every subtle slide of my dick in my sister's pussy, she let out a little grunt or groan. A short, oh-so-sexy gasp. She subtly slid herself up and back on my dick as we went. I doubted she was even aware she was doing it.

"Oh. Ah. Hrrrn."

The soundtrack of Madison's pleasure accompanied us down the hallway. Every step acted as encouragement for our bodies to do the very thing they were built for. The one act we didn't want to commit.

The exquisite feelings of my sister's slippery snatch finally overcame me. I stumbled us over to the wall and started humping her into it. All thought slipped away as I drove my cock into Madison's magically tight pussy. My peak so wondrously, disastrously close.

"Don't," Madison whined. "Feels so good but... We can't. You know why. Please."

Her words pulled me back. I regained control of myself, stepping us back from the wall.

"Lost myself for a moment," I said. The closest thing I could give to an apology.

"Me too," Madison said, "It's so hard to hold back. But we have to."

I nodded my agreement and started us back down the hall. Still, I felt my sister's body wrapped around me. Every step was an unintentional thrust. An accidental plunge. Both of us reveling in that inescapable drive to give in and go to town on each other.

Somehow, we made it back to the relative safety of my bedroom. I cautiously lowered us down to my bed. We resumed our former position: me on my back with my sister crouched over me. For a moment, as we got into position, her big red shirt hung down and I got a glimpse of her bare little breasts through the neck hole. OK, so that was way sexier than anticipated. Definitely didn't need to do that again.

Worse (or better, depending on your perspective) was how comfortable it was to lay back on the mattress. Yes, the constant motion, along with the accompanying rubbing and rutting, had ceased. But now our bodies were aligned in a very natural way that made things feel far too good in a very different sense. Both of us sighed as we sank into the softness of the bed.

Madison hung over me, panting. Catching her breath. Her adorable face was a mask of focus; softened on the edges by the pounding sense of impending exultation.

"Fuck," she said. That one word was filled with meaning. Exasperation and exhaustion. Relief and frustration. All at once.

I gave my little sister a warm grin. I could tell she was struggling, and she needed me to be strong.

"We're OK," I told her. "We've got this. We'll look it up and we'll have a solution. It's almost over, I swear."

Madison nodded. Her sapphire eyes distant. I wondered if her sanity was snapping from the stress. The stimulation. She caught me staring and forced herself to regain focus. Then she grabbed my phone off the nightstand, handing it to me like it was the defibrillator paddles.

I opened my browser then faltered. OK, so what had seemed like a perfectly reasonable request now loomed as an impossible act. What exactly should I put into the search window?

'Penis stuck' led to a lot of bizarre stories about emergency room visits due to improper interactions with computer equipment (printers are a common thing, apparently?) but nothing about our particular problem.

'Penis stuck in vagina' however, had some suggestions. I'll concede, I was a little surprised I found anything at all.

"It's a vaginal condition," I explained to my sister, "There's a medical term for it and everything. Penis captivus. Basically, it's your pussy getting a massive cramp. Although a lotta people think it's a myth."

"Fan-titty-tastic," Madison said, "What do we do about it?"

"It says we need to relax," I said.

"I am relaxed," Madison said.

"Really? Cause you don't sound all that calm."

"Shut up and keep looking."

But that was all I could find. The more details I added, the less information I received. And once I started searching for 'accidentally stuck in sister' I realized I'd gone down a very wrong path.

"OK, so what do we do?" Madison asked. She sighed, frustrated. "Lying here in bed isn't going to accomplish anything. Anything not genetically cataclysmic, anyway."

"I think Mom has some edibles in her room," I said.

"Pretty sure that would only make this worse," Madison said.

"I guess we've got to see an actual doctor, then," I said, "Like savages."

*

Step one of leaving the house was both completely mundane and a total adventure. I was naked and Madison was wearing a t-shirt and nothing else. Putting on clothes was the bare minimum (again, pun absolutely intended). But it wasn't as impossible as I'd first feared. In fact, functionally, it was fairly easy.

I pulled on a clean shirt with relative ease. Underwear wasn't an option, but I was able to pull on a pair of jeans. So long as I left the zipper open, they fit around our illicit connection easily enough. I could even snap the top button.

Next it was Madison's turn. We agreed that she'd be swimming in my clothes, but it was better than figuring our way up a ladder into her bedroom. And, truthfully, something on the larger side did have some additional benefits in keeping our connection as discreet as possible.

So, Madison lifted off her shirt. And I saw my little sister naked for the first time. I knew I shouldn't react, but I froze anyway.

"Earth to Aiden," Madison said, waving her hand in front of my eyes.

Wow. My little Maddy had an incredible body. I mean, I already knew this. I knew it. But the actual reality of seeing her so completely was beyond what I could have conceived. Madison's taut stomach and defined arms. Her little breasts -- about the size of lemons -- so perfect and perky with tiny, pink, prominent nipples.

And my hands were gripping her amazing butt cheeks. And her sensational pussy was pulsing around my dick. And her pretty, freckled face was smiling my way, in an odd kind of golden perfection. It broke my brain a little, I have to be honest. Holy fuck.

Would an earlier me have conceded that Maddy was attractive, in a cute sort of way? Sure. But it's not like I was perving on my sister like you usually see in a story like this. Her attractiveness was more of an objectively accepted fact. I already had a type: tall, curvy brunettes like my current college girlfriend. Madison was the opposite of that.

And yet. And Yet. AND YET.

"I'm not that special," Madison said. She flushed, making her even more adorable if such a thing were possible.

"Sorry," I said, "Having very un-brotherly thoughts right now."

"Your body is also kind of awesome," Madison said.

I couldn't hold back my surprise. Similar to my own perspective, I never got the sense that Madison had anything but familial feelings for me. The boyfriends she brought home were fellow athletes. Tall, dashing men with taut, muscular bodies and disturbingly arrogant sneers. Nothing that would make you think she harbored a secret sibling crush or whatever.

But there she was, in my bedroom, saying, "I mean, it's hard not to notice how good you look. You being naked and all. When did you start working out?"

"It's not that big a deal," I said, inordinately pleased that my little sister had noticed. "I'm still a tub of cheese whiz compared to you."

"More like a hunk," Madison said, "Of cheese. Like cheddar, I mean. Whatever."

Now it was my turn to blush. Madison's eyes traced my body and she chewed on her bottom lip, hungrily, in a way that made the word sexy superfluous.

"You were always cute," she continued, "But you leveled up to full-on stud. I take it back, Amy is one lucky girl."

"Kelly," I said.

"Whatever," Madison said.

We regained our momentum. I put a gray hoodie over Madison's head, which was easy enough. She raised her arms and slipped into it, then pulled her blonde braid around so that it snaked down her front.

Getting my sister into a pair of my jeans was a bit more complicated. But with some contortions, and a bit of pain (for both of us), Madison was able to straighten her legs for long enough that we could pull the pants onto her. It helped that they were probably twice her size. Again, we left the zipper open to preserve our unfortunate attachment.

All-in-all, we still looked ridiculous. But at least we could pretend at some shred of propriety. A fig leaf in all the meanings of that phrase. We checked in the mirror to be sure -- if you ignored the fact that we were both stuck in a very strange position, you could hardly notice Madison had her brother's cock stuck in her vagina.

Our mission completed, I turned to walk us out of the bedroom, but Madison squeezed my arm.

"Gator, wait," she said.

"What's wrong?" I asked, assuming there was some functional problem with how we'd disposed of ourselves.

"I want to talk for a sec," Madison said, "Like, for real."

"You can't break up with me, we're literally attached. Also, related."

"No! Just shut up for a sec, OK?"

Like I said, holding my sister up wasn't too hard, but it was still a strain. So, I sat down on the edge of the bed, letting Madison perch over me. It put my head at the same level as hers -- her blue eyes aligned with my brown -- and I was amazed at how intimate this felt. I mean, everything about this was intimate but certain positions felt more loving than others. This one in particular.

Madison took a deep breath. Our faces were so close, it was like we were about to kiss.

"Is this weird?" Madison asked.

"Nope, totally normal," I said, "In fact, it's a family tradition to accidentally impale yourself on a sibling and be stuck there forever. Like Thanksgiving, but with more stuffing."

"Ha ha. I guess I'm not doing a very good job of expressing myself. What I mean is, this is a lot. It's a bunch to take in and I'm not doing the best job of processing it on top of everything else going on right now. College is a ton of stress -- not just the classes but the social stuff. I came home this weekend because I needed a break from it all. Then this happened and..."

"I get it," I said.

"I don't suppose you're home for the same reason?"

"No," I said, "Honestly, I'm happy at school. I think that's one of the reasons I started working out. Because I finally saw myself as worthwhile. But, believe me, I understand that feeling of not fitting in," I said.

Instinctively, I looked down at where I was very much fitting in my sister's pussy. She saw where my eyes went, and we both chortled.

"Not like that!" I said, but it was too late.

We devolved into giggling messes. It was a different, warmer moment than the last time we'd cracked up. Before it had been a storm of emotion. But this was more like a soft, warm rain. Refreshing, in a way.

"Look, this is truly, deeply fucked up," I said, "In all the ways. Maybe there is meaning in this, somewhere, and it'll help us appreciate our lives more. Or maybe it's something we'll pretend to forget and move on with the rest of our lives like nothing happened. But either way, we'll get through it together."

I held my sister's chin in my hand, affectionately. Her eyes met mine. She started to tilt her head towards me. Then she gulped. Froze.

"We need to get going," Madison said. She did her best to lift us up. It didn't do much, but I got her hint. "Thanks, Aiden. I do feel better now."

*

I know it sounds stupid, but as we started to walk out of my bedroom, I was feeling fairly self-assured. Sure, my sister was speared on my fuckstick like a consanguineous cunt kabob, but we'd managed to make it work. We probably looked like a strange, stumbling, sex-zombie, but we were able to move with a surprising consistency. Both of us were now dressed. And we'd made this new emotional connection, as well.
Everything ahead of us seemed possible. Maybe even easy. This was a dumb problem, but we were going to solve it. Soon. It had all gone so well, in fact, that I think we got a little overconfident. And that's where things turned wrong. Well, wrong-er, anyway.

I'd forgotten about before, when we'd walked down the hallway the first time. Changing clothes had been too awkward for anything to feel good. Now, though, my dick, and the spectacular sensations of my sister's squeezing pussy quickly reminded me. I could tell Madison was feeling it, too, her breaths coming in quick, sharp gulps with every step.

So, yeah, this felt super good in all the ways we agreed it wasn't supposed to. But we'd endured it before, so I figured we'd be fine, so long as I took it slow. Holding my sister's incredible ass in my hands. Feeling her slide up and back, ever so subtly. Her little moans. The feeling of my epically hard, oh-so-sensitive cock sliding against her, tight, wet warmth.

All good. No problem at all.

It was the stairs that did us in. I took the first step gingerly, so focused on not falling over, I didn't pay attention to the other cliff we were racing towards. But I became unavoidably aware of it as my second foot landed on the step and my sister let out a little "oh."

It was a short thing. A quick, tiny squeak. But Madison may as well have shouted it. Her legs and arms tightened around me. She buried her face in my shoulder.

I took another step.

"Oh."

There it was again.

"Aiden I..."

"It's OK," I said, "We're almost there."

"Uh huh."

Third step. I tried to hold my sister securely in place, squeezing her butt even tighter. But apparently that only made things worse.

"Oh! Ohfuck," Madison said.

I felt a sharp pain on my shoulder and realized my sister was biting me. Her breaths were coming in tight gulps now. I moved to take the next step.

"Please," Madison said, her voice shaky and thin. "Don't."

I paused. "We have to go down the stairs, Monkey."

"I know. Just wait a second. I think I can hold it... ohgod."

My sister tightened around me, like a constrictor on its prey. Arms. Legs. Jaw. Pussy. All cinched in one coordinated movement.

"Oh no," Madison said. "No. Please no."

"You're OK, Maddy, I've got you."

"Uh. Uh huh."

"One more step, OK? I know this is hard for you. But this is taking a lot out of me too. I can't stay here -- if we fall it'll be really bad. We'll take one more step then rest for a while. I promise"

"How... many. More?"

"Only three. This next one plus three."

"ohFUCK."

I moved my right leg down. Madison sucked in her breath like she'd been stabbed. I risked a glance at her face and saw she was bright red. Her eyes squeezed shut like she was trying to grind them into her skull. I moved my left leg to join my right. We jostled slightly as I settled.

Madison stilled. Her breathing stopped. For a moment I thought she'd made it. That her willpower had won over. But then I felt her body ratchet tighter.

"Oh God..."

"I've got you, Maddy," I said.

"Oh please. Oh no."

"It's OK," I said. I reached back to stroke her hair. The gesture seemed to only spark her more.

"Please no. Oh no no no no no."

I held my sister close. Comforting as much as I could. As I felt her body betray her.

"Oh OH OH! ahhHHAA!"

I'd thought Madison was tight before. But now my sister's pussy clamped down. Her hips swiveled to compress herself even further. She shook, a rumbling tremor that ran from her toes through her fingers. Even her teeth seemed to vibrate around my shoulder.

Finally, she went limp. A long, pained breath rushed out of her. Madison trembled and I couldn't tell if it was one last, little cum or a sob. Maybe both.

I would never admit it to her, but seeing my sister cum like that was one of the hottest things I'd ever seen in my life. Sexier than porn or even watching my girlfriend go over the top. Maybe it was the constriction of it, the loss of control. Holding back but also very much letting go. Also, the sibling thing. I wasn't supposed to know what my little sister's orgasm looked like. And that made it all the more alluring.

But I also felt bad for Madison, having to endure it. And, of course, I had to push through a lot of unwanted stimuli as well. The easier we made this on each other, the less we amped ourselves up, the better it was for both of us.

"Sorry," Madison said, as soon as she got her breath back. "Oh God, I'm so, so sorry."

I shifted so I was looking my little sister right in the eyes. The azure of them had redoubled, to the point where they were almost glowing.

"Me too," I said.

"Aiden, you didn't?"

"No," I said. Actually, through it all, my dick had been surprisingly fine. Not that it didn't feel amazing, my sister's body orgasming around me. But the urge to join her -- that ingrained, instinctive reaction -- had never kicked in. Somehow. "We're safe. I promise."

"OK," Madison said. I could tell the thought of me cumming inside her had almost broken her post-orgasm buzz. She settled into me.

"Are you alright?" I asked.

"Yes," Madison said, after taking a beat. "That was intense. I didn't even see it coming and then it was on top of me. I couldn't stop it."

"Those stairs are rough," I said.

"No doubt," Madison said, "But I think I'm OK now."

Sure enough, we were able to get to the bottom of the steps without further incident. I turned the corner through the living room and towards the front door. In relatively short order, we managed to get outside, the door locked behind us, and settled onto the stoop.

The day outside was clear and warm. Bright skies shone down on us, almost mocking. The breeze played and chased around the leaves. The bark of a single dog echoed in the distance. The spring air felt clean and pure in my lungs. Even the street stayed car-free. Our sleepy, suburban neighborhood stared back at us with quiet condemnation.

"God, I'm so embarrassed," Madison said, as we both settled onto the stone steps in front of the house.

My sister was clearly reliving her cum on the staircase. As she spoke, I could tell she was trying to keep me from looking at her. Seeing the state I'd left her in. But in our position that was impossible to accomplish.

"You couldn't help it," I said, "If anything, I feel like a jerk for doing this to you. Making your body react that way. I hope you can forgive me."

"The only thing you'd have to apologize for is if your oversized, insistent friend down there decides to chime in," Madison said, "But he's been well behaved so far. I know it's not fair. A double standard. Me going off like that while you have to hold back."

"No, I get it," I said, "Mine comes with consequences."

"Speaking of which, you're still OK?" Madison asked. I think at this point I think she was almost impressed with my stamina.

"Oh yes," I said, "I could do this for hours."

Madison laughed. Her pussy rippled around me. And for the first time, I felt that little tingle at the base of my dick that told me that, no, actually, my own finish wasn't that far away at all.

*

We'd agreed about getting to a doctor. As stupid as it must seem in retrospect, it really felt like our only rational option in the moment. According to my phone, there was an Urgent Care clinic roughly ten miles away and that was by far the best option.

We were less aligned, however, on how to get there.

Driving, obviously, was out. Madison suggested an ambulance but blaring sirens down our silent street seemed like the opposite of discreet. Plus, I showed her how much one would cost and that quickly shut down her suggestion.

I wanted to take an Uber, but Madison thought it'd be mortifying to be in someone's backseat so exposed and insisted we take the local bus. This made no sense to me, and I let her know it. At least in an Uber it'd be only one person who'd see us versus an entire crowd of commuters. And a car would be cleaner, besides. Not to mention the fact that the bus stop was a good eight blocks away from us. I was comfortable carrying Madison for short distances, but that was way too far.

We were arguing back and forth with no end in sight when Madison suddenly went silent. Her eyes crossed and another, small orgasm rippled through her. I guess I'd been gesturing a little too much -- moving around as we argued. One slight shift and BOOM she was hitting the high note.

I could tell it wasn't massive; a tiny climax. But still. After that -- panting, covered in sweat, blonde hair starting to splinter out of her braid -- Madison seemed way less eager to argue. For once, she backed down and allowed me to summon an Uber.

We waited, quietly, on the stoop. Again, I hoped none of the neighbors were watching. Just sitting that way had to look pretty inappropriate. And we'd already done way more than sit. My sister snuggled closer, enveloping me in her arms. A reminder that our connection was more than cock-to-pussy. Our whole bodies, our entire existence, was wrapped around each other there on the front yard.

"This is so weird," Madison said. A bit of a giggle. "But also kind of nice."

All I could do was agree, holding my sister tight. Her warm breath tickled on my neck. This was nice. Dammit.

Finally, about ten minutes later, a small, black Prius showed up. We stood up and staggered over to the car. The window lowered.

"Aiden?" the driver asked. Remarkably casual considering the disposition of the double-backed-beast she was talking to.

Just looking in the open window, I could see the driver was older than us, but not by much. Maybe early thirties. Curvy with brown hair and huge, green eyes. My damned dick pulsed as I realized this woman was my exact type -- right out of the catalog. Madison let out a little squeak, then punched my back.

"We're having a bit of a medical emergency," I said. As if that made any of this explicable.

"I can see that," the driver, whose name was Kat according to the app, said. There was a practiced nonchalance to her words. Like two siblings so intimately attached was something she encountered all the time. "Well, you and your girlfriend can settle in. This won't take long at all."

Girlfriend. Right. Because that's exactly what we were. So much more appropriate.

"Let's get in, um, honey," I said, opening the back door.

"Sure thing, uh, babe," Madison said.

We climbed in, awkwardly, and settled down on the backseat. All things considered, it was pretty comfortable. I'm not saying I wanted to go on a road trip this way, but I'd been anticipating much worse.

"All good?" I asked my sister in a whisper. My words dripped with meaning.

"Ready to roll," Madison said.

We shared a grin. We had this under control. Then the car lurched forward, and I felt the rumble of rubber on pavement. Oh no.

"Oh God," Madison said. It came out more like a groan than a prayer.

"You two ok back there?" Kat asked. She glanced in the rearview mirror. I thought I saw a bit of a grin on her lips, but then it was gone. "I've been meaning to check the suspension."

"It's... fine..." Madison said through gritted teeth.

Both of us were feeling it: a low vibration that reverberated through us. A constant, insistent stimulation that seemed, inconceivably, centered at the crux of our connection. Oh God, indeed.

The rumbling was perfectly attuned. Just enough to stimulate us both in the best/worst of ways. But also not nearly enough to put either of us over the top. Fantastically disastrous. Like one long edging session. I tried to look out the window. To stare at the stitching on the seats. Focus on anything but my sister's gorgeous body as it writhed on my cock.

"So, how long have you two been together?" Kat asked.

"Since... this morning." Madison grunted it out.

"That fast, huh?" Kat asked.

"She means how long have we been dating. Sweetie," I said. Words were no easier for me.

"Oh. Long time," Madison said, "Feels like. Forever. Really."

"Really? That's so sweet," Kat said.

The vibrations were getting worse. Intensifying. Maybe my nerve endings were getting overstimulated. Worse, my sister was now subtly moving her butt back and forth, as if I wouldn't be able to feel it. Even the fact that we had an audience -- that our driver was clearly checking the rearview mirror way more than was necessary for safety's sake -- seemed to intensify the entire experience.

I clutched Madison's ass. "Stop moving. Monkey. Dear," I said, through gritted teeth.

"Stop feeling. So fucking. Good. Guh-Gator," Madison replied, voice equally restrained.

BANG

We hit a pothole. Madison legit slid right up my cock and straight back down. One fantastic, full stroke. Her pussy rippling around my shaft the entire way. My sister let out a little shriek and fell forward, but I could tell she hadn't cum.

Fuck though, that had been close. Remember that little tingle at the base of my dick? It was quickly spreading. Like a fuse burning its way to the bomb. And we all know what the explosion would be like.

"Hang on kids," Kat said, "I swear we're almost there."

"Almost... there..." Madison repeated.

She started sliding more sharply on my cock. Again, I squeezed her ass, trying to hold her in place. It stopped her movements, but it didn't solve anything for me. Just changed the nature of the sensations.

The rumbling of the car wasn't going anywhere. My sister's sweet pussy was squeezing around my dick. I caught Kat's green eyes in the mirror, staring back at me. A wicked little smirk on her lips. The world -- heck, the entire universe -- conspired to make us both cum.

I did my best to disassociate. Our destination was only a few minutes away. All I had to do was survive the car ride. We'd get out of the car; the vibrations would stop. Madison would calm and our bodies would settle. We'd go inside the clinic, and everything would be fine. Easily solved. My orgasm would never arrive. That profound, illicit pleasure couldn't take hold. I wasn't going to cum in my sister. I wouldn't fill her fecund womb with my feisty, flowing fertility. Oh fuck.

"We're here!" Kat announced. The little Prius screeched to a stop.

I returned to the real world and found Madison staring down at me with an intensity that seemed to reach right through my soul. The look in her bright, blue eyes was a mixture of desire and fear. Desperate want and frenzied worry. The rumbling of the car had taken us both well beyond rationality.

I started to move, but Madison shook her head, violently. My sister gripped my biceps like we were both about to jump out of a plane rather than climb out of a car. She was like a cat that won't leave the carrier. I saw her eyes start to roll back.

"No," I said, firm as I could. "You're in control. Don't do this."

"I can't stop," Madison said. Her voice tremulous.

"Yes, you can," I said. Then I repeated, more firmly, while pinching her arm. "Yes. You can."

Madison's eyebrows knitted. Her arms shook. Her lids snapped closed, and her mouth slimmed down to a line. For a moment I thought I'd lost her. But then she softened, blinking her eyes back open.

"Yeah. Yes. I can," she said, "I can hold it back."

We reached for the car door in concert, pushing it open. Both of us inched and shuffled our way out of the backseat. Every movement brought a new breathy exclamation from my sister. But we managed to get out unscathed. Kat's Prius slowly pulled away, I leaned back against the nearest building and let out a long sigh.

We'd done it. Despite everything, we'd made it to the clinic. We were safe. All I needed to do was take a few steps and go inside. We could sit in the waiting room -- it'd be weird but fine. We'd overcome the last obstacle. Relief washed over me. OK, maybe a little regret. But almost all relief. I swear.

Only a few more steps to safety.

"You alright?" I asked my sister.

"Nuh-not really," Madison said, "That ride was a lot."

"For me too," I said.

"Yeah, I can kinda feel it?" Madison said, "You feel, um, stiffer. Thicker."

"I swear, I'm trying. Truly"

"You've been amazing," Madison said, "I'm the horny slut who cuh... who can't-"

"No," I cut her off, "You're doing your best and that's all that matters."

Madison hugged me tight. OK, she'd been clasping me for quite a while now. But this was a real hug. An expression of warmth and affection. Damned if my dick didn't respond in the most inappropriate way.

"A few more steps," I said, "We'll go inside. We'll get this solved."

We shared a little smile. I turned around, ready to step into the clinic. But I found myself staring at a blank, brick wall. Confusion filled me. Where was the glowing 'Urgent Care' sign? The little band aid-cross-symbol-logo thing? Heck, there wasn't even a door. Just a blank stack of orange-y rectangles. Had we been dropped off at the wrong spot?

"Oh fuck," Madison said, putting the same puzzle together. "We're at the mall. Fuck. The clinic is inside the fucking mall."

Desperately, I reached for my phone and looked. Sure enough, I must have missed it before, the clinic was in the shopping center. Second floor, all the way over by the Nordstrom on the far side of the building. It might as well have been in South Sudan.

I know it doesn't sound like that big a deal, walking through the mall. Sure, my back ached, and my arms were sore, but I still had the stamina. It was all the other stuff we'd endured. The way my sister was gasping as she gripped me tight; her warm, dripping wetness slipping and gripping around my dick. The way my cock seemed to throb, simpatico, with her grasping pussy.

In that context, four steps seemed like fifty miles. Let alone working our whole way through the mall. With probably hundreds of people watching us the whole way.

"OK. Alright. It's fine," Madison said. Her tone trembled in a way that undid the assuredness of her words. "A little further. We can do that. Right? Of course we can."

"I don't know, Mads" I said, "I'm feeling really, um. You know. Close. I'm- I'm trying to hold back, but."

"Me too," Madison said, "All that shaking in the car. Your thick, hard dick thrusting into me... Anyway. We'll take our time. Go slow. If I don't cum then you won't, right?"

"Definitely not," I said, far too confident in my control.

"OK," Madison said, "Alright. We can do this. I believe in us."

*

"I can't do this," Madison said, staring at the swath of suburban shopping Shangri-La that now surrounded us.

The mall, a true bastion of post-capitalist consumerism, gleamed clean and bright. Rows of stores lined either side of the broad, white-tiled concourse. A spouting water fountain, nestled in plastic plants, burbled enthusiastically. Something soft and tuneless played in the background. Terrifying in its tranquil, antiseptic welcome.

It was a Monday, so the mall was not busy. But it wasn't as empty as I would've hoped, either. Everywhere I looked there were clumps of humanity -- businesspeople, families with small children, elderly couples -- all striding around with a serene air.

My sister and I stood off to the side, planted in front of the entrance to the Macy's. Still wrapped inextricably and inexplicably around each other. The enormity of what we were about to undertake held us frozen. Never had a Foot Locker felt so imposing

A few people stared as they walked past. But most didn't seem to notice and even fewer gave us more than a glance. The world flowed around us, a constant circulation that was both reassuring and disturbing. I thought of the meme of the dog drinking coffee in a fire. This is fine.

"Maybe we don't need to go to the clinic," Madison said, "Maybe this will go away on its own."

"What? No," I said, thinking of all we'd already gone through to reach this point. "We're almost there."
"I know but-" Madison swiveled her head around taking everything in. Blue eyes wide. "Seriously, Aiden. I can't do this. There's, like, a lot of people here. I don't think I realized what being exposed like this would mean."

Now that she said it, I could feel Madison's entire body tensing around me. Like a rubber band wrapping over and over around a set of spokes.

"I'm sorry, I'm not as strong as you," Madison said.

In that place, with that tone, in that moment, it was such a strange, unexpected thing for my sister to say and it took me aback. Our whole lives, Madison had been the athletic one.

Despite the disadvantages of her size (and generalizations about her gender) my sister was the physically gifted sibling, capable of any feat. I was the soft nerd, hiding behind my computer screen. Just because I'd gotten in shape that year, sorta, didn't change any of our inherent differences.

"No, dummy," Madison said. She tapped me on the forehead. "In here."

"Maddy, that's so not true," I said.

"Yeah? Well then explain why I keep coming apart. Literally. While you've kept total control."

I sighed. In truth, I didn't have an explanation. There had been so many times that day where I could have, arguably should have, let go. But my little sister had told me no. So, I didn't.

"Maybe it's you," I said. The revelation dawning on me. "Maybe it's because I can be strong for you."

My little sister gave me a look of incredulity and adoration. "I wish I could do the same."

"You are," I said, "Just differently. Your body is betraying you and I feel so badly for it. You have every excuse to give up. But you haven't."

"I guess that means we have to go forward, huh?" Madison said. She chewed at her lip. Her pussy clamped down similarly on my cock, as if in sympathy. "I can be strong. But maybe stay here. For a second."

I became very aware, again, of where we were. Standing in front of a department store, surrounded by shops and people, having a very private, intimate, emotionally-explicit conversation together. The discordance of it all made my stomach twist.

"Everyone's watching us," I said.

"Please don't make this worse," Madison said.

"Really?"

"C'mon, Aiden. Seriously? You're going to start kink-shaming me right now of all times?"

I hung my head, legitimately chastised. Madison's eyes unfocused. I could tell she was trying to separate her physical sensations from what was building in her body. But then her face stiffened again.

"If I go again -- not that I'm planning to -- but if it happens. Are you going to be OK?"

I truly wasn't sure. My sister's budding, building orgasm was feeding my own. And I'd endured the same torture in the car. Plus, she'd already been able to release twice. I was dealing with a whole day's worth of rising pressure. My balls ached like I'd been punching them all morning. And, in a sense, I had been. But I wasn't going to say that to my sister. I knew it would only make all of this worse.

"I'm fine." I grunted out the lie.

Madison's adorable face split into a wild grin. Her voice lilted with pride. "See? Strong."

With her mind quieted, Madison went back to trying to force her body to do the same. She flexed her fingers, kicked out her legs. I heard her whispering under her breath and realized she was counting. I recognized it as a calming mechanism, trying to drag out each stage of her breaths to slow-counts of four.

"You've got this," I told her.

I stroked her back with one hand. Moved the other to behind her head, cradling it.

"Don't!" Madison squeaked out. "Stop. Making it. Worse."

"Another kink thing?" I asked.

"Uh huh." Madison mumbled back.

I made a conscious effort to keep my hands away from any potential triggers. We stood like statues, a strange monument to illicit sibling incest set up in front of the Macy's menswear section. People sauntered past like schools of fish -- tons of side-eye, but otherwise silent. I did my best to shrug back, like this was something anyone could be empathetic about.

Finally, Madison's muscles unclenched. It was a weird sensation, feeling her pussy unwind around my cock. But I was very much unavoidably aware of it. Finally, after what felt like twenty minutes (but was probably closer to three), Madison let out a deep breath.

"OK," she said, "We can go."

"You sure?"

"Yes, dammit, get moving before it starts all over again."

We started walking down the mall hallway. I took my time. A strange, awkward stagger. Madison's eyes clenched. She let out a little squeak. Then softened again. Both of us breathed heavily. Sweat ran cold down my near-feverish back. I felt the dampness of my sister, too. Especially in one particular spot.

Past the Spencer's and the Build-A-Bear. Around a planter. Then Victoria's Secret (I should have expected such cruelty from the universe by that point), Abercrombie & Fitch, some weird candy store that seemed dedicated to all five people on this planet who like Smarties. And so forth.

All the way my sister's body was growing tighter around me. My dick flexed deliciously in her damp, cinching snatch. Both of us dizzy with it as we climbed the now-familiar heights to that terrible, wonderful precipice.

Up to this point, it had mostly been Madison. The way her body was responding. I'd had moments where I felt the start of the beginning of something. But it was distant. Like the trailer for a movie coming out three years from now. I felt the excitement, sure, but it remained very theoretical. Something to worry about way in the future.

Now, though, the thrill was on top of me. Inescapable. The tingles raced up and down my cock. My balls drew tight to my body. I could feel my dick swelling. Straining. I tried to fight the pleasure off, but it seemed inescapable.

Finally, in front of the food court, I had to stop. It wasn't a conscious decision. My legs simply quit pumping.

Madison kicked my flanks like I was a stubborn plow mule.

"Keep going," she said, through a growl. Her face now planted firmly between my neck and shoulder.

"I need a break," I said. Speaking was almost as hard as walking now. "Settle down."

"Doesn't matter," Madison said, "Have to. Push through."

I was about to protest when I realized what she was saying. We were past the point of holding back. It was a race against the cock. Er, clock. Sorry about that.

"I get it," I said, "Give me one minute. To calm."

"I don't know if I have a minute in me," Madison said. I felt her teeth close on my trapezius. At this rate, those tooth marks were going to be permanent. "Ohfuckme."

"I know," I said, "But we're almost there. I can see the escalator. That's the easy part. We just stand there. Then, like, ten more steps. Twenty tops. And we're there. We can sit, see the doctor. Everything will be fine."

"Yeah," Madison said, like she was seeing it all in her head. "But Gator? Aiden? I know you need a break but I'm..."

I took in a huge gulp of air, steeling myself. I took another step. Paused again.

"Fuck, that Mrs. Fields smells amazing," I said.

"Maybe now isn't the time?" Madison said.

"Right right right."

Another step forward. Another. Madison's breath was hot in my ear. Her body incredible in my arms. Yet, despite the feeling of inevitable release, I wasn't worried.

See, I was convinced that once we got to the escalator, we'd be OK. A short ride where we wouldn't be moving (at least, not under our own power) seemed like it would be safe. Without the jostle, the bump and grind, I thought our bodies would calm.

I was wrong.

In the end, I don't know what caused it. Maybe the vibration of the steps as they rumbled upwards gave my sister the right stimulation. Or perhaps it was all the faces of the people headed downwards with nothing to do but stare our way. It could be that as I got on the steps, I shifted in some way that set my little sister off. Or it was all of those things combined. It doesn't matter, really.

I got on the escalator. We started to slide upwards. Madison's whole body tremored. Like she'd been struck by lightning. Except for one key part that snapped closed like a crocodile's mouth.

"Ohfuck," Madison said into my shoulder. "Oh no. Not here. Not yet. Oh please please please please no."

I looked around, desperately. We were already too far up the steps, people behind us, to step back. We were nowhere near the top. You could not have devised a better trap to keep us in place while my sister leapt into a massive climax right in the middle of the public mall.

"NonononooooOH! AH! Hmmmmmmmph!"

Madison bit down on me something awful. Her nails dug into my sides. Her hips pumped up and back, lewdly. No longer able to do anything but encourage her own orgasm further. The world around my beautiful sister and me shrank down to the illicit pleasure she was enduring.

Meanwhile, everything around us kept going. That's the reliable savagery of existence -- even when it really ought to stop, it doesn't. The stairs kept sliding us upwards. Crowds of people turned, looking our way with wide, bewildered eyes. The music of the mall tinkled in the background. The incessant banality only amplified how unique -- how intense -- this moment was.

I felt Madison's pleasure unclench. She gasped for air. But there was no sanctuary. Not for my poor little sister.

"AhhhhHHHAAAA!"

As soon as it seemed she'd escaped that first explosion, she squeaked as another round ran right into her. If her first orgasm on the escalator had been like a rocket launch -- sudden and upwardly violent -- this next resembled a barreling freight train. Fast, violent, rumbling endless.

We were near enough to the top now. I could see a small corridor between two stores just a few steps away from where we stood. It was tiny, thin, poorly lit. Probably a maintenance hall, or an employee entrance. The perfect place for us to find some small amount of privacy so we could ride this out.

"Harrrrrrrugh!"

The sound coming out of Madison was so primal. Animal. I could only imagine how loud it would have been if she wasn't trying so desperately to hold it in. Her cries of pleasure, her pleas for blissful mercy, spurred me forwards.

I leapt the last two steps of the escalator, then hit the ground running. No longer caring about anything except getting to that hallway. I pushed people out of the way, uncaring. Like a brutish bulldozer, shoving any obstacle aside to clear the way forward. My little Madison swung in my arms like a bizarre, medieval weapon as I raced us through the crowds. The whole time my sister was still going off.

"Oh! Oh fuck! Ohhhhh... fucking yes."

I could no longer track whether she was in the throes of the previous peak or had rolled into the next.

I don't know why I felt like getting to that hallway was so important. My cute, blonde sister had already orgasmed. Was still. It's not like reaching the corridor would stop her. Or go back and erase what everyone had already witnessed. But some protective part of me demanded that I get us there. Give my sister one last sliver of dignity as she wrung out the dregs of what sounded, felt, like a monumental cum.

Racing, hopping. Sprinting like a madman. Elbows out, knees pumping. Aggressive and desperate all at once. I careened around the crowds, past the Electronics Boutique, and finally -- finally -- skidded into the safety of that private passage.

The space was as empty as I'd anticipated. As dark and removed as I'd prayed for. If we'd found this spot sooner, there would have been nothing to be embarrassed about (or, at least way less). As it was, it was mostly too late. For all I knew, we were already trending on TikTok. But some part of me felt the satisfaction, still, of having sacrificed for my little sister. Kept her safe.

Well, I would have.

Let's go back. Before my sister went off, when we were about to get on the escalator, I'd have sworn I was as close to cumming as she was. Maybe even closer. I knew I wasn't supposed to, but I was beyond the point where stopping myself was truly possible. Like a cascade, my sister's explosion should have triggered my own.

Except, inexplicably, it didn't. Getting to that corridor, finding a safe spot where Madison could ride out her storm, had become my sole focus. And somehow, that drive -- the adrenaline of her very public orgasm -- put a stop to my own impending ecstasy.

As I got to the corridor, my conscious brain finally kicked back in. I became very aware of the fact that, not only had I not cum, but I wasn't on the edge of it either. I took the last few steps, exultant. Madison's body was tight around me. Her voice in my ear was a combination of exultant groans and desperate sobs. But I'd done it. I'd escaped the danger and protected my sister from that most calamitous of consequences: conception.

Then, for some reason I can never explain, Madison said the words.

"Stupid, naughty pussy..." she panted.

One step into the corridor. Two. We were fine. We were safe.

"...cumming on my brother's cock."

And there it was. I can't pretend it was anything else that set me off. No other sensation or sudden movement. Nothing different about how my sister's body rubbed or squeezed around my oh-so-sensitive member. Just. Those. Words.

Madison said, my brother's cock. And I vaulted from total control to complete surrender.

All those tingling sparks that had been running up and down my shaft, the urgent yearning that gripped my cock head (all of which had been almost silent for the last five minutes) suddenly, insistently, and irrepressibly went from mostly muted to full ON. From kindling to conflagration. Splash to tsu...

Oh FUCK! I think I shouted it aloud.

"Aiden?" The worry in Madison's voice was unmistakable.

It didn't matter. I was too far gone. The entire world at once completely destroyed and yet also totally focused on that one key point where my brotherly penis was firmly ensconced in my sister's fertile vagina. The oh-so-dangerous tip of my barrel shoved hard against the opening to her very vulnerable cervix.

"Oh God. Oh Maddy. Madison... I-I can't... Oh fuck, I'm sorry. Oh my adorable baby sis, I'm so sorry."

We caught each other's eyes, our pupils widening in the exact same primordial anticipation and fear. I didn't need to say the words. Madison was well aware without them. My body had gone completely still except for that one, very important part. My dick swelled up; heat radiating from it like a furnace turned on full. Fingers taut on my sister's perfect butt.

Already lost in the swirling of my inevitable peak, I distantly anticipated the ire of my sister. Certain Madison was about to scream bloody murder. To beat my back bloody with rage and frustration. Not that any of it would have stopped my body one bit.

But instead, my gorgeous blonde sister only held me closer. Cradled me like a wailing babe. Ran her fingers up through my hair so affectionately it felt like love.

"Aiden, it's OK," Madison said.

We stood together in that little hallway. My sister's back pressed against the wall. People filing past.

"Maddy, I can't. Oh fuck. I have to. Have to cum. Please, sissy let me cum." I was practically bawling out the words. "I tried so hard for you."

"I know sweetie," Madison said, "I've got you."

"Oh God, Mads. Little Monkey, it's not stopping. Oh guh -- God. I gotta. Gotta cum. In you."

"Shhh, It's OK," Madison said, "Let it all go. Cum, baby. Deep as you can. Be a good boy and give it all to me. I promise it's OK."

"Ugh. Ah. Oh Maddy. Little sis. Oh fuh- OHffffffFUCK!"

I went beyond verbal. I thrust myself forward as far as I could go. Distant, I heard my sister grunt in pain as I crushed her against the wall. I was too far gone to respond.

A pause.

A second that felt like an eternity. The edge of the edge of ecstasy.

Then, finally, I released inside my sister's sweet, fertile pussy.

"Ohhhhhhhhhuuuuuurrrrrrrgh!"

The taunt and tease of the entire day. Madison's climaxes. The fact that I was buried in my sister. Unprotected and all. The public nature of our coupling.

All of it built to create an orgasm beyond any I'd experienced before. The extremity of my ecstasy seemed to blow the back of my head clean off. But, also, the volume -- the ardor -- of what I produced as part of it. I could have put out a fire with the strength and magnitude of what I put in my sister.

Thick and insistent. Urgent and unending. A cannon's power with a firehose's capacity. The intensity of my spend only amplified my bliss as it blasted through every fiber of my being. Like it wasn't just my body peaking, but my very being.

Up to the point of my release, I'd thought Madison was at the end of her ecstasy, squeezing out the final bits. But as my instrument joined the angelic chorus of her rapture, I heard my sister's voice hit another octave. A high pitched note that probably set off dogs several miles away.

"aahhhhhAAHHHHHH!" my sister screamed. "Oh fuh... Fuck that feels so GOOD! So hot... Oh! It's- Oh yes, sweetie. Put it all inside. Deep. Feels so fucking gooooooooood."

I dug my fingers deep into my sister's amazing ass while my dick did everything it could to root itself in her grasping pussy as my insistent spend jetted into the depths of her fertile womb. Washing away all thought along with it. The only thing I can be certain of is the indescribable pleasure that exploded through my body as I unloaded an ocean's worth of my rich, copious sperm -- burst after burst -- into my sister.

One tiny fragment of consciousness managed to form. What little cognitive cohesion I had was able to cobble together a last, hopeful thought.

At least it's over.

*

The next thing that I can say happened for sure, both of us were back in that little hallway, pooled on the floor. I was on my back and Madison was sitting over me. I felt something cold under my bottom and realized it was the remains of our proprietary mixture. Madison's slippery juices and my own slimy spend.

My little sister was kissing my forehead and cheeks. Lovely little smooches of affection. She was still cradling my head in her hands. The look on her face -- I assumed she'd be angry -- was nothing but adoration.

"Mads?"

"I'm here, Aiden," Madison said.

"What happened?" I looked at the two of us and answered my own question. "Oh God, Monkey. This is all my fault."

"Oh no," Madison said, getting mock-stern. "You don't get to apologize. Not after you put enough special spermies in your sister's body to repopulate the species."

"Madison."

"It's OK," Madison said, "I was joking. It's fine. It's probably fine. Plus, after everything that happened to me? Honestly, I was starting to take it personally that you didn't cum yet."

"I am sorry though," I said, "Beyond the whole, um, unprotected thing. I know you didn't want me doing that. In you."

"It wasn't as bad as I thought," Madison said, "I mean, it was weird and icky and all that other stuff we talked about. But also... Anyway, it was unique. I'll leave it at that."

"Fair enough."

"At least we both got something out of it: amazingly memorable over-the-top awesomeness."

"For you, too?" I asked.

"Are you kidding?" Madison asked. "I didn't think it was possible to feel that good. Fuck me, Aiden. I mean if I thought sex was like that? Well, yeah. Anyway."

"Same," I said.

"Really? Better than... Beth? Sandy? WhateverHerNameIs?"

"Kelly," I said, "But let's just say it was unique and leave it at that."

"Fair enough," Madison said, giving me a mock salute. Then a huge grin formed on her face. "And now it's over. We're free. Finally all done."

Lifting at her knees, my cute blonde sister began to rise up. I felt her pussy slide up my dick. The realization hit us both at the same time. Madison froze. She stared down at me. Her eyes filled with shock and sadness. She dropped back down. A low, miserable groan of despair escaped her lips.
After all that -- an epic explosion unlike any I'd ever experienced that had drained me of every last endorphin, leaving me limp and shattered on the grungy floor of the mall -- I'd somehow managed to stay hard. My sister's pussy continued to clasp around my cock.

We were both still stuck.

"Oh, you've got to be fucking kidding me."

"I don't understand," I said, equally confused.

"Seriously, Aiden?!" Madison shrieked.

She pounded her fists on my chest. Did her best to jump up and down like an enraged chimpanzee. My sweet, loving sister was gone; replaced by an insane, raging creature. And yet, was it wrong that I still found her hot as fuck?

"Why is your giant cock still hard as a rock?" Madison asked.

"I don't know!"

"You did cum, right?"

"Duh," I said, gesturing at our bodies. As if in response, a glob of semen dripped out of my sister's pussy and splattered on the floor beneath us.

"Has that ever happened before?" Madison asked, "Where you, like, kept going?" The look on her face was pure panic.

Sure, I'd had days where my stamina had been better than others. Times I'd recovered more quickly. But nothing like this. I couldn't imagine why I'd magically gone tantric inside my sister. But there was no debating that it had happened. I'd just had the longest, most epic orgasm of my life. Yet as far as my dick was concerned, that was only the prologue.

"Well, you sure picked a stupid time to show off, you stupid fucking sex god!" Madison said it with such rage, I almost didn't catch the compliment. "Jeez, like you didn't already fuck me up for life with that monster orgasm you gave me."

"Calm down," I said, "People can hear us."

Yes, we had our little hallway. But we were both very much in the public confines of the mall. People stared as they walked past.

"I don't fucking care anymore!" Madison shouted back at me. "You stuffed me full of your dirty, disgusting brother-splooge, almost certainly knocked me up with my own nephew, and your depraved, giant dick can't wait to do it again!"

"You said it was going to be fine," I said.

"I lied to make you feel better," Madison snapped, "Seriously, did you feel how much gooey, gluey jizz you just pumped into me? I'm probably going to have octuplets."

"I don't think it works that way," I said.

"Are cocks supposed to get stuck in pussies?" Madison was nearly hysterical now. "Are you always ready for another round right after you nut?"

I shook my head.

"So maybe we don't focus too much on how things are supposed to work, huh?"

"OK. I get it," I said. I put my hand on my sister's shoulder. Started lightly stroking her back. Gave her the warmest expression I could. "You're upset right now and you have every reason to be. I'm not happy about this either, I promise you. But we're here. The Urgent Care is right around the corner. And after all that, I promise you I'm not going to cum again anytime soon. No matter what we do. So, the solution's gonna take a little longer than we hoped. But it really is almost over. A few more steps and we're done."

*

"Oh FUCK!"

No, my sister wasn't screaming out another orgasm. As predicted, the two of us had no problems getting off the floor and shambling our way across the hallway to the Urgent Care clinic.

Sure, a bunch more people stared at us as we went. Not that I could blame them. We probably looked like we'd just recorded a porno in that corridor. Our already makeshift clothing situation was now far sloppier. My sister's hair stuck out at all angles. And both of us leaked thick fluid with every step. So, yeah, I'd imagine we were quite the sight. But both of us were too cum-hungover to care.

Then, as we walked up to the clinic -- finally feeling the relief of having reached a medical professional capable of ending this unbelievable situation for good -- the universe dealt us one last kick in the crotch.

"You've got to be fucking kidding me," Madison said.

The interior of the Urgent Care was pitch dark. The glass, front door was completely covered by a metal fence. The sign in the window said CLOSED.

Frantically, I loaded and reloaded my phone. As if that would change what I was seeing in front of me. The Internet, in its unshakable wisdom, declared that the Urgent Care was very much open with a reasonable set of hours for a Monday. But the office in front of us remained shut.

I leaned back against the glass guardrail behind us. Madison slumped against me. Everything we'd endured to get here had been for nothing.

"What do we do?" Madison's eyes searched mine. In a few hours, I'd seen so many versions of my little sister. From buoyant and confident to caring and loving to pissed off beyond all belief. Now she'd settled into this: scared, devastated, resigned. It was, by far, the most haunting sight of all.

I scrolled through my phone. "There's another Urgent Care about twenty minutes from here. We get up, get another Uber, and get over there as quickly as we can."

"No, Gator."

"It won't be too bad. Like we said, we probably lived through the worst part."

"Aiden, listen to me."

"The Internet says it's open, but I'll call in advance. Heck, for that matter I can get an ambulance and they'll take us to the hospital. Enough of this clinic bullshit. Plus, we can get you a prescription for Plan B at the same time. Two birds, one stone -- we can make it happen."

"Aiden please. Stop."

The look on my sister's face screamed of exhaustion. Surrender. Her big blue eyes were wet. Like she was about to cry.

"Let's just go home," she said.

"No," I said, "NO! I can fix this. Please let me fix it."

"I'm done," Madison said, "After everything that happened today. I need to be done."

"And what about...?" I gestured at how our bodies were still, impossibly, locked together.

"I don't know," Madison said, "We'll figure it out. But not right now. OK?"

I realized my sister needed me to stand by her. Even if it wasn't the best decision, it was hers. And I had to respect that. It was my one chance that day to do something to show my sister how much I cared about her. So, I swallowed the rest of my arguments.

Carefully, gripping each other tight, we got ourselves off the ground.

*

In cruel contrast to how things had gone to that point, the trip home was completely uneventful. In deference to my sister's wishes, we waited at the nearby bus stop and got on board. People stared at us as we sat near the back, but no one said a word. Then we dragged our beaten bodies the eight blocks back home.

All of it, the whole adventure, happened without incident. The calm, easy nature of it all was almost worse; like our bodies were taunting us. See how easy this all could be, they seemed to say.

I thought I'd done my sister a favor by taking her home. I figured she'd be exhausted, sure, but relieved. Maybe even happy. But the closer we got, the gloomier she became. Madison was monosyllabic when we got off the bus. Down to grunts and sighs as we lumbered back to the house. Then, as the grand finale to it all, as I flopped us down on our living room couch, she burst into tears.

This wasn't a few small dribbles, either. My little sister was full-on, ugly sobbing as we sat, inextricably connected, in the same place our parents liked to serve post-dinner cappuccinos to their friends before breaking out the Scattergories.

"Everything I do is wrong," Madison said, "Every decision I've ever made. Every choice. It all comes back to blow me up. God hates me."

"I don't think God's even aware you exist," I said.

"Gee thanks," Madison said, "That's so much better."

"Maybe now isn't the best time for us to be espousing our religious philosophies," I said.

"I'm such a fuck up," Madison said. My shoulder was getting soaked. "Everyone says college is the best, but all I do is miss home all the time. I suck at classes; I'm failing everything. I have, like, one lousy friend and she's my roommate so I'm pretty sure it's a pity thing. And I'm painfully, desperately, hornily, single."

"Hornily?"

"Shut up." Madison gave me a shove, and for a moment I thought I'd gotten to her. Then she started wailing all over again. "I suck. My life sucks. And today is just another drop in the toilet."

"This sucks," I said, "I know it does. But we'll get through this. Life will get better, I promise."

"Of course you'd say that. Your life is fucking perfect. Good grades, hot body, great girlfriend. What did you do to have everything work out so great?"

To answer, I gestured at our current predicament.

"Fine," Madison said with a huff. "But this is, like, temporary. I'm cursed forever while you're living a charmed life."

"Maddy, I don't think my life is as flawless as you...

But before I could finish, my phone shook in my pocket.

BUZZ-BUZZ-BUZZ

I didn't need to look to know. Once again, the reality of where I was, of what was happening, sank down on my shoulders.

My girlfriend was calling me while I was buried deep in my own sister. I had so many better options in that moment -- all some variation of ignoring the call. But for reasons I'll never understand, I slid my thumb across the screen and answered.

"Hi Aidy!" Kelly's voice came through the speaker. Far too loud for my liking.

"Aidy?" Madison asked, her face twisting in disgust.

I shushed my sister. "Hi Kelly," I said, "I'm a little in the middle of..."

"Come on, Aidy! Be nice," Kelly said.

"Hi, um, Kell-Bell," I said, starting again. "Listen, you caught me-"

"Oh, I've missed my little Aidy so much," Kelly said, "You would not believe what happened without you on Sunday. So, Jenny and Carrie both wanted to..."

My sister caught my eye. She gave me a look that, even in that position, made my cock want to shrink down to nothing. Meanwhile, my girlfriend continued on.

"...but I saw the cutest dress and you wouldn't believe it. It was, like, so expensive. But..."

Madison rolled her eyes so hard, I worried they might spill onto the floor. "Hi Kelly-Belly!" my sister shouted it at the top of her lungs.

"Who's that?" Kelly finally paused. I could hear the worry in her tone.

"Oh Kelly-Belly, Aidy and I were just talking about you," Madison said. The look she was giving me, I swear it was downright evil.

"Kelly, I have to go."

"Aiden who are you with right now?" Kelly's voice was jumping octaves like the salmon ladder in Ninja Warrior.

"She'd nobody," I said, "My sister. I have to drop now. No, I'll call you later. Tonight. When I'm back on campus. Bye."

As soon as I clicked off the call, Madison fell forward, laughing hysterically. "Oh my God. I can't believe I was sweating that bitch."

"What?"

"You hate her!" Madison said between peals.

"I do not," I said.

"Puh-lease. I heard one side of one little conversation, and I can tell you can't stand her."

"She's my girlfriend," I said, "She's amazing."

"She's got big tits, you mean," Madison said. She d gave me the most contemptuous sibling look she could muster.

"She's smart and funny," I said, "And yeah, she's really super-hot."

Madison raised her eyebrow so high, it almost popped off the top of her head. Then her face brightened up, like when she'd had her other revelation before. "That's why you're home this weekend isn't it?"

"I needed to do laundry," I said, "And Mom said she'd make chicken pot pie."

"You were hiding from Amy, Vanessa, What'sHerName," Madison said.

"I'm not afraid of Kelly," I said. There that eyebrow went again. We were going to have to peel it off the ceiling. "OK, so maybe things aren't exactly perfect between the two of us right now."

"Jesus, Aiden. Do the girl a favor and dump her," Madison said.

OK, so maybe I started this whole thing off with a bit of a half-truth. I'd gone home that weekend to do laundry, yes. And have a home-cooked meal, for sure. But maybe also to get a break from Kelly?

Don't get me wrong -- my girlfriend was hot as hell. Long brown hair, massive tits, thick blowjob lips. Total package and very much my type. And sure, she could be a bit vapid (and controlling, and mean). But, man, in bed she was...

Actually, no. She was serviceable in bed, at best. But she was my girlfriend, the kind of girl who wouldn't even have blinked my way back in high school. So, like a dude who'd spent a ton of money on a sports car that was too uncomfortable to drive for more than five minutes, I couldn't let go of the dream of what Kelly should be.

I guess I'd hoped that a weekend at home might help me find a way to fix things. But, as you now know, that didn't happen. And now I was stuck. Literally. In my sister.

"I get it," Madison said, "You look in the mirror and still see awkward, geeky high school Aiden. You don't realize. She's not out of your league. You're out of hers. You're sweet and funny and fucking hot as hell and any girl that gets you is the luckiest woman on Earth."

"I am?"

Madison nodded, smiling. "You could pull someone twice as gorgeous in a second. Someone you actually enjoy being with. Don't put yourself through this. You'll have another girlfriend in a week. You know, if you want one."

"Thanks Madison," I said, "That means a lot. Coming from you, I mean."

"You mean your fuck-up little sister?"

"Hey, I'm as much of a mess as you are," I said, "I mean, look at the situation we're in right now."

"You've been perfect," Madison said. She looked down at me on the living room couch with those bright, blue eyes. Bright and smiling, like she was seeing something wonderful.

"I did kinda maybe inseminate you," I said, "A little."

"That wasn't your fault," Madison said.

"I mean, I'm pretty sure it was," I said, "I'm the one who lost control."

But Madison was staring past me. Lost to the world. She repeated what she'd just said. It wasn't your fault. Like she was examining each word. Interrogating them individually. Watching their behavior and scrutinizing the shape of them.

"You did lose control, didn't you," Madison said. She grabbed my shoulders. Eyes, suddenly sharp, pinned me down like icy daggers. "Why?"

I gestured at our connection. I thought the answer was pretty obvious. With all that stimulation, it was a miracle I hadn't blown up well before then.

"You did last a really long time," Madison said, "I'm impressed. Even when I was cumming in the mall, it seemed like you were going to hold on."

"Yeah, I thought so too," I said.

Madison tilted her head at me. "And then I said those words."

"What words?"

Madison beamed like I'd never seen before. Hungry and raw. Almost frightening. Her smile overran her face. Her eyes were a flash of wicked blue. Her expression an insane, ravenous glee.

"We didn't talk," Madison said, "About before."

"I don't-"

She put her finger on my mouth to shush me.

"I told you, I've never had sex before," Madison said, "I mean, I've cum. Lots of times. From my fingers. With toys. Because of clumsy little boys. But not like that."

"I know," I said, "I messed it all up."

Madison shook her head at me. Long blonde braid swishing oh so alluringly.

"Did you know?" she said. Her voice had gone soft. Smoky. "I didn't tell you. I figured you figured it out. But did you know how hard I came? It was like getting hit by a wall of ecstasy. The pleasure of it. The things you did to my body. I completely lost control. Blew my top off. Obliterated my being."

"Um. Wow."

My little sister leaned forward. She teased my ear with her lips. "I can't believe I came so hard. On my brother's cock."

Up to this point, I hadn't been soft, exactly (obviously, or we wouldn't be in this mess), but I wasn't exactly fully engaged either. After the massive blow-out, then the long ride home, and finally the less-than-pleasant conversation with my girlfriend, my dick had gone kind of numb. Achy and distant. I was aware of it, of where it was nestled, but in truth I'd been able to sort of lose track of things.

But as Madison breathed those two words, my cock shot straight out as full and stiff as I'd ever felt it. As engaged and urgent as I'd ever known. Like every signal my brain could receive was coming from one very specific location.

Uh oh.

"That's what did it. Isn't it?" Madison said.

Oh no.

"You like fucking your SIS-ter," Madison said.

Oh God.

"Am I a good little sis?" Madison asked. She wriggled her ass alluringly. "Cumming on my brother's huge awesome cock?"

"Madison," I said, "What are you doing?"

"We need to get you off again," Madison said, "So I can get your thick, hard dong out of my dripping, tight, little pussy."

"We already tried that," I said, "I already... It didn't fix it. We're still stuck. Doing it again would only make things worse."

"You're right big brother, we can't do that," Madison said, talking in her best teasing sibling voice. "It's so wrong. So nasty. You can't put your massive penis in there. Even though, oh, it feels so gooooood."

I wanted to argue. To deny. To say that none of this was doing it for me. That it turned me off, in fact. But my body (much like my sister's before me) was betraying me. My hands squeezed at her sides, her butt. My eyes went down to slits. And my cock -- that greedy, selfish (literal) dick -- did all the talking for me.

"Do you like your little sister's spectacular, slippery pussy? I can tell you do. Even though it's incest. It's OK. I love it too. I love fucking my big brother's amazing cock. Because it's gross and dirty and broken. Makes me cum so hard. Feeling those nasty, naughty spermies fill my unprotected little cunt- OH!"

My dick twitched, almost violently, as she said those words. My hands clamped down on her biceps. I let out a little growl.

"I know, sweetie. You want to get your little sister pregnant. Knock me up. Put that brother-baby deep inside. Make my tummy swell up with your seed."

I shook my head. Violently. Ground my teeth. As much as my body demanded it, I couldn't bear to give in. I know it seems like such a small thing. Barely an admission after everything that had already happened. But my rational brain wouldn't let me confess. Couldn't handle the consequences of admitting the truth.

"Just say it," Madison chanted, "Tell me. Say you like fucking your little sister. Shoving that big brother dick deep inside my tight, grasping twat. Need it so bad. I'll beg. Be your super-sexy-sister-fantasy. Do anything you want. Just tell me and I'm yours."

"Madison, I don't know why I'm responding this way," I said. One last desperate grab for the edge of sanity. "I swear, I'm not that person. Please believe me."

My sister shifted back to normal. Like the werewolf post-full moon. Her face went blank. "We need to end this, Aiden," she said, "And, whether you want to admit it or not, this is working. Unless you have another option?"

I started to speak, then shook my head. I didn't want her to be right, but that didn't make Madison any less correct.

"So, take you sister upstairs and fuck her brains out. Now."

There was nothing left to do but surrender. I reached under my sister's awesome bottom and lifted us both off the couch. Madison wrapped her arms around my shoulders. She rested her head on my shoulder.

She didn't say a word the whole way. Not even a grunt as we went up the stairs. We turned into my bedroom and flopped down, backward, onto my bed. Fuck, it felt nice to be on that soft mattress.

Madison gave me no reprieve. She pulled me up so I was sitting. Our eyes were now at the same level. She lifted up her arms. She didn't need to say anything, but she made it clear in case.

"Shirt."

Again, I felt the argument swell in my stomach, but I stopped it. I reached for the hem of her gray hoodie and pulled it over her head. Madison's little tits bounced free. They were small; perfectly shaped. Flawless teardrops with hard, pink nipples standing out proudly. My sister gave her chest a playful little jiggle, just to watch me goggle.
"Pants," she said.

This was less easy, but I unsnapped her bottoms and shuffled them down her thin legs till they were gone. Her little patch of blonde pubic hair was matted with our shared spends, making it look even sexier.

"You too," Madison said.

Awkwardly, I stripped down. My sister gave my body an appreciative once-over.

We had one final step. All that pulling and tugging had Madison's braid more out than in. She reached back for the tie. Her honey blonde hair tumbled loose, spilling over her like an aureate waterfall. Long enough that it covered her awesome little boobs and ran down to the small of her back. Is it weird that I still think of that as the sexiest part of the whole reveal?

Now both of us were completely in the buff. After everything we'd been through, it was strange to suddenly feel so exposed in that moment. But there we were.

"Now," Madison said. I could tell she was trying to keep the smirk from her face. "Say it."

I nodded. What else was there to do? "You are the hottest, sexiest, most gorgeous woman I have ever been lucky enough to..."

"Nooooo," Madison said. She waggled her finger at me like the world's sultriest Dikembe Mutumbo. "Say. It."

"I like having sex with my sister."

Madison finally let her grin win. A cackle broke out from her lips. "Again."

"I love fucking with my hot little sis."

"Don't hold back."

"I need to fuck my baby sister till she screams!"

"No, I mean don't hold back! Fuck ME!"

"Oh right. Sorry."

"Could you please shut up and plow me now," Madison said, "I swear you're the world's worst sex fiend."

I pulled my sister down and flipped us over. She fell back, me looming over her. Our situation meant that we couldn't have much movement, but none of that mattered. I drove into my little Maddy with an abandon I didn't realize I had in me. It was animal. Raw. Needful and rough. I'd have been afraid of hurting her, except for the fact that she was clearly loving it.

"Yes. Fuck me. Feel that tight, dripping sister-pussy wrap around your dick. Oh don't... Don't stop. Don't stop fucking me."

For the first time, I closed my lips around Madison's tits. I nipped at her neck, nibbled at her ears. Wrapped her hair around my fist like a bridle and pulled.

"OH! Fuck yes! Keep fucking... Oh it feels so good. So wrong and twisted and awesome. You... Me. We're sick. Broken. Oh so fucking dirty and wrong."

"Fuck Madison. You feel so good."

"OH! You're not supposed to see my little pussy. Feel my grasping, gaping cunt. See my face when I- oh Oh OH! Hear me grunt and cry. Bad big brother. Naughty bro. Making your baby sister feel so GOOD."

"I -- uhn -- I know. So good. So hot. You like that? Cumming on your big brother's cock?"

"Fuck your little Monkey. Be a good brother and take care of my aching, needy pussy."

Fuck she wasn't kidding. Her sex was squirming around me sensationally. Her body wrapped so tight. I did everything I could to hump at her. To bury and thrust and drive. Like trying to shove my whole self inside her.

We became a mass of sensations and sounds. This was not good sex. We were neither coordinated nor agile. We were a mess of thrusting, rutting in my boyhood bed and none of it mattered because the hotness that was my sister was screaming out orgasm after orgasm as I pounded her with my aching, unyielding cock.

When we'd started, I'd imagined I'd last a lifetime. It felt like I could fuck forever. Yet far too soon, I felt the inevitable end reach around my dick and squeeze.

"So BIG. So THICK. Oh FUCK," Madison shouted. "God I... I love that dick. Love my brother's awesome amazing cock. I love you, Aiden. I love YOU!"

There it was. Madison's back arched, her beautiful face cinched in illicit bliss. Her body shook, spattering under me. That incredible, tight pussy pulsating out its pleasure. I felt my own rapture start to rise up.

"Your cock," Madison said, groaning. "It's getting thicker. Oooo. You gonna cum for me? Huh big bro? You gonna cum in your sister?"

"Getting... close..."

"Oh, but big brother. You can't cum in my unprotected little pussy. You can't put all those naughty, nasty little sibling spermies in me. It's so wrong."

"Sick. Little sister. Begging me. To cum. In her fertile cunt."

"Yuh- Yes. Do it. Cum in me. Put it all inside. Put your baby in me. Do it. Make my little body swell with your fertile seed."

I roared. Madison screamed. I plunged my dick as deep as I could go.

And erupted.

"Madison... Oh Maddy. Hrrrrrrrrrrrn... Take it! Take my cum. Feels so fucking good to cum in my sister."

Madison's eyes went wide as she felt me fill her. "Oh yes. Oh God. So good. Feel it spurting inside. Muh-making our baby. Oh yes. Make your baby in me. I'm such a good little sister. Making my brother feel good."

"Oh yes," I said, the words shooting out of me in concert with my cum. "Sweet baby sis. So good. Oh fuck you feel so good."

Through the pleasure arcing over me, I felt warm little kisses on my cheeks. My sister, rewarding me for seeding her once again. As if the wash of endorphins wasn't reward enough.

Madison wrapped her legs and arms around me tight, like I might try to escape. Making sure she got every drop of my sinful, incestuous spend. My dick bucked inside her, fountaining out every last bit of fertility it could find.

I swear at the end, I was pumping out blood. Essence. I had nothing left, yet my body kept spewing forth. Emptying itself deep into Madison's womb. My whole world collapsing down to where brother's cock met sister's cunt. Fraternal sperm and sororal egg.

One.

*

When I blinked back to consciousness we were still in bed. What had felt like a perfect fit now seemed awkward and odd. Our legs were sticky. My arms ached. My left hand was numb.

Madison blew a blonde hair out of her eyes, but it settled right back.

"Fuck me," she said, "That was intense."

"Totally," I agreed.

Madison froze. Her contented face shifted to something strange. A kind of curious elation.

"Oh fuck," she said. Whispered. Almost like an invocation. "Oh yes. Oh fucking please yes."

Gingerly, my sister put her hands on my chest and pushed. A smile quirked on her lips. Then, without ceremony or pause, Madison shoved my weight off her like freeing herself from a fallen tree trunk. She kicked her legs out. Threw up her hands in victory.

"YES!"

My dick, finally soft, slipped out of her steaming pussy, looking almost abashed. A massive glob of white cream belched out in its wake. I fell back into the mattress.

"Thank fucking GOD!" Madison cried. She leapt out of the bed. "Freedom!"

Before I could say anything, my sister careened out of my bedroom. I heard the crash and thump of her racing up the ladder to her room. Screaming and singing like a mad woman.

I relaxed into the pillows, feeling oddly empty. I was happy we'd finally separated. Of course I was. But at the same time, I had this sense of loss. The sheets itchy and cold. Also sticky with our shared sibling spend. So that sucked.

I don't know why it bothered me so much, my sister's joy. The way she'd run out of the room like it was the best moment of her life. But it did.

I lay there for a while, staring up at the ceiling. I was a bit high on oxytocin, sure. And my body ached like crazy. I glanced at my phone and saw five voicemails from Kelly, plus a ton of texts. I didn't bother to look any further. My world had been so perfect that morning and now here it was, shattered. But all I could do was feel depressed that it wasn't more thoroughly cracked.

Eventually, I looked at the time. It was 4pm, far too late for classes that day. In fact, it was so late, I had to worry about getting out of the house before my parents got home from work. I started to get dressed, but I still felt pretty gross after everything I'd been through. So, I got up to take another shower.

As I went into the hallway, I realized I hadn't heard anything from Madison in a while. I didn't hear her leave, but I thought maybe she was napping up in her bedroom. I hoped she wasn't sobbing somewhere. I thought about knocking on her door, but I didn't want to make it all worse.

So, I went into the bathroom -- making sure I had a towel this time -- and stepped into the shower. A moment after I'd submerged myself, I heard a knock on the door.

"I'm in here," I said, mind clearly on automatic.

"No duh!" Madison replied.

She threw open the door. My gorgeous, blonde sister was still completely naked. Her little tits and full pussy lips perfectly on display. The curve of her epic ass teasing at the edge of my vision.

I know you won't believe this, I can hardly accept it myself, but my dick started to respond. Achieving erection after everything that had already happened was pretty impressive. Major religions have been built around smaller miracles. But apparently my cock just couldn't quit my little sister.

Not that I could blame him. Madison's flaxen hair was a disaster of tangles. Despite the fact that I'd definitely put all my sperm inside her unprotected pussy, her body was streaked with dried cum. She was dotted with little purple bruises on her arms, her ass, her tits (my fault, I know). Her face screamed of exhaustion. Yet she was still the hottest woman I'd ever seen; could even imagine.

Fuck, I was going to die alone, in love with the one woman on Earth I could never have. Everything we'd been through, what we'd done, it was going to haunt me for the rest of my life. I felt truly damned. Like Madison said before, maybe God really did hate me.

My little sister glanced at me in the shower like it was nothing at all. She sat down on the toilet, and I heard the thin trickle of her taking a pee.

"Sooo," she said, standing after she'd wiped herself. "I realized I kinda need something."

"Plan B," I said. Despite the glass of the shower door and the running water, we could hear each other quite clearly. "No doubt. Let me finish in here and I'll drive you over."

My sister put her hands on her hips. Adorable and oh-so-sexy. "That's not exactly what I had in mind," she said. She reached for the shower door and pulled it open.

"Um, Madison?"

"Please, I've already seen it all," Madison said. She ran her eyes up and down my body with an expression that belied her words. "Except for the most funnest part of course."

Without a pause, my sister confidently strode into the stream of steaming water, reached down and, with equal nonchalance, grabbed my dick. Madison knelt down, putting the purple head right at eye level.

"There's the big, naughty penis that took my virginity," she said, almost cooing at it. For a moment, I thought she was about to blow it a kiss. "Aren't you the sweetest, thickest cock I ever saw. Yes, you are!"

"This is a little weird, Maddy," I said.

My sister gave me a dirty look. "After everything today, you think this is weird?"

"It's not normal," I said.

Madison shook her head at me and sighed. She stood up straight. "Maybe not," she said, "But I realized that after everything that happened today, I'm pretty gross and need to clean off. Also, and I can't emphasize this point enough, I really. Truly. Need. To fuck my brother again."

I was so startled, I nearly fell backward.

"But Mads..."

"I know. It's so wrong," Madison said, "So dirty and broken. And I already came so much. But I can't stop thinking about how good it felt to have my big brother inside me. So, I want it. Again. Now."

Madison turned around and bent over at the waist. The act was so perfect and dexterous, almost like doing one of her gymnastics moves. Elegant and perverse all at once. That fantastic butt now stared back at me. And below that, the puffy pink of her engorged pussy lips.

"What if it... I mean, we just got it out," I said. It was such an oddly normal thing to be worried about, that it almost made my question feel all the more twisted. "What if my dick, you know, gets stuck in you. Again."

"I don't care," Madison said. She started wiggling her amazing ass back and forth. "I know it's bad, but I can't stop. I need you, brother, to fuck me. Hard."

Well, who was I to argue with that level of dialectic?

"You love fucking your sister, you love fucking your sister," Madison sang as I slid into her.

"Shut up, brotherfucker," I replied.

"Oh OH! First of all, that's no way to talk to your baby sis," Madison said, "Also, I prefer the term sib-slut."

"Whatever, now take my cock like a good little sis or I'll shove it in your ass next."

"Promises promises," Madison said.

We put the playful banter aside and I battered my sister's pussy. The full freedom of movement, finally, should have allowed us to at least be affectionate in a way we hadn't been before. Instead, we rutted -- needful and crazed -- in the shower. Both of us gasping and grunting under the spraying water.

Madison's little breasts shook as I took her from behind. I grasped a hank of her long blonde hair, and she went off like I'd pulled the fire alarm. I slapped that phenomenal ass and watched in amazement as the flesh barely rippled.

For her own part, my little sister's dirty mouth gave me all the encouragement I needed.

"Fuck your little sister. Be a good brother and make me cum. Doesn't it feel so right to be bad? Isn't it perfect to be so broken? Stuff me full of that big, thick sibling dick. Make me your little sister slut. Oh, fuck your sister you perverted, perfect boy."

And when I reached my final moment, I didn't stop. Didn't pause or even ask the question. Just thrust forward as far as I could and unleashed another torrent of potent sibling-semen deep into my sister's perfect, unprotected pussy. Unleashed an ocean of sperm into her waiting womb.

"Oh fuck, yes!" Madison screamed as she felt me let go. "I fucking love it when you cum in MEEEeeeheeeheee!"

Despite the abandon we expressed before (and during) the act, I couldn't help but feel some trepidation when we'd finished. Not about cumming in my sister -- I'd already accepted those consequences. Craved them, if I'm being totally honest.

But when it was time for us to separate -- as Madison slid herself, slowly, off my dick -- that's when the worry really flowed out. If we'd managed to put ourselves right back in the same position? If we were, once again, stuck? I mean, that would have been a colossal catastrophe.

So, I felt a profound sense of relief when my cock finally plopped right out of my sister with no problem. Another batch of brotherly baby makers spilled out of her sex along with my dick.

Madison didn't say a word. Instead, she turned around and stood up straight. Then she did the most surprising thing of all that day. She kissed me. Hard. On the lips. Tongue and all.

"Mmmmmm, that was awesome," Madison said. I was so taken aback, I didn't know how to respond. "I don't suppose you have another one in you?"

That question, I had an easier answer for. "I don't think I'm going to be able to walk for a week," I said, "Let alone do that."

"Ohhhhh. No more penis for poor Katie."

"Kelly."

"Who gives a fuck, honestly?"

"Fair point," I said.

"In any case, I guess if there's no more playtime, you can take me to the pharmacy," Madison said, "After I'm done cleaning up, of course."

"Plan B," I said, "Right."

"Actually, I was hoping to pick up some mints," Madison said. Her face split into a broad, lewd smile.

*

I walked out of the shower feeling fantastic. Like I'd stepped into a fresh body. But by the time I got dressed, grabbed my things, and got into the car, my stomach was sour. I tried to rationalize it away.

When Madison and I had been stuck together, well, it had been this weird (also kind of wonderful) once-in-a-lifetime thing. But the result had been unavoidable.

The shower, though, was something else entirely. That was a choice, all of it. A conscious decision to keep doing the very, very, very, very, very bad thing. It had been awesome, amazing, incredible. And that kiss...

But why? What did Madison want from all this? Hell, what did I want? It was all so dizzying, and I didn't know what to do.

My sister came downstairs soon after, dressed in a cute t-shirt and jeans, and we headed off to the Walgreens. The whole way, Madison stayed focused on her phone. Finally, though, my dumb brain got the best of me, and I had to speak.

"Shouldn't we at least talk about what happened?" I asked. It came out even more aggressive than I'd intended. "Where we go from here?"

"What do you want me to say?" Madison asked with a shrug. "I liked fucking Dad way more."

"Madison..."

"Fine, you're right. You're way better than Dad was."

"Madison!"

I found an empty spot on the side of the street and swerved over. I threw on the emergency brake and glared at my sister.

"What. The. Fuck."

My sister beamed back at me. That perfect little sister smirk that said how much fun she was having making me angry.

"You're way too easy to tease," Madison said.

"Fine," I said, sulky.

"You want me to confess?" Madison asked. She grabbed my hand in hers, holding it tightly. "That I'm a huge incest slut who's completely in love with my brother and I want to have his babies?"

"No, of course not."

"Cause I do."

Wait, what?!

"Come on, Aiden, it was pretty obvious," Madison said, "Plus I screamed it out during sex. So that's kind of a dead giveaway."

"I thought you were just, you know, saying stuff," I said, "In the moment."

"And you're supposed to be the smart sibling," Madison said, shaking her head. "Seriously."

"But all your high school boyfriends were jocks. Dude-bros with great bodies and, um, questionable critical thinking skills."

"And your type is tall, curvy brunettes. Right?"

"Well, yes, but..."

I thought back to all the time I'd spent with my sister growing up. Those happy memories. And then today. Yes, it had been an ordeal -- messy and public and awful. But also, fun? Sort of? I mean, sharing all that with my sister. It had been kind of a revelation, actually.

Maybe we were connected, stuck, in a way that went beyond the physical. Was all of that chaos and craziness about me, us, falling in love?

"You're so smart and funny," Madison said, "You make me laugh all the time. Guys underestimate that -- how awesome it is when you can make a girl laugh. Almost as good as an orgasm. And unlike every other man I've ever met, you were always so kind and supportive."

"I was lonely, awkward. A computer geek."

"You were smart," Madison said, "Thoughtful. And coming into yourself. In a way that most people don't bother to even try."

"Plus, I have a good body now, right?"

"That's not material," Madison said, "I mean, it's nice. I'm not going to say it isn't super-hot how you're like, cut and all that now. But the real turn-on isn't your body at all. It's the fact that you finally see yourself as someone worthwhile."

"And that whole thing about my yucky, slimy, disgusting brother-spermies?"

"Well, in the moment, it felt like the sort of thing I was supposed to say," Madison said, "And, to be fair, the whole thing was super scary. But then I thought about it and realized, actually, it was exactly what I wanted."

"So, falling on my dick is the best thing that's ever happened to you," I said.

"Not exactly," Madison said, "Like I said, in the moment, it was uncomfortable and frightening and all that stuff. Especially when I couldn't stop, you know, Cumming."

"It was also really fucking hot," I said.

"Yeah, well, I won't deny it's all turned out pretty OK for me," Madison said.

"For us," I said.

Madison flushed with happiness. But then she forced herself to be serious again. "Well, almost. The whole pregnancy thing is probably less than ideal. I wasn't kidding when I said I want to have your babies. But maybe not right this minute. So, if you could stop metaphorically dicking around and drive us to the pharmacy? Because I'd like some literal dicking around before I have to go to class tomorrow."
We got the prescription and drove home. It didn't make sense to go back to the dorms. Our parents were both home by then and we all sat down for a nice family meal. At first, I was nervous, like they'd be able to tell what Madison and I had been up to. But, no, everything was just like normal. It was fun, actually, being all together like that.

Then, after we helped clean up and my parents settled in for bed, Madison and I went upstairs. I was about to turn towards my bedroom, but my little sister grabbed my hand, pulled me up the ladder, and dragged me up to her bed.

There, once again, Madison proved me wrong: my dick was more than ready to return to active duty. But, being us, you know we had to try doing something different.

And so, for the first time that day, my sister and I made love.

*

There's not much more to tell, but I know you'll complain if I don't give you all the details so here you go. I promise, there's nothing that happened next that you wouldn't have predicted on your own.

I went back to college and broke up with Kimmy. I mean Kelly. Sheesh. Madison headed back to school, as well. We talked on the phone every day. There may or may not have been some sexy sibling play over FaceTime. Unfortunately, the Apple Terms of Service prohibit me from relating the specifics of such encounters. Also, the pregnancy test came back negative, so clearly God doesn't completely despise us.

Despite what you might think, however, screwing my sister didn't solve everything. She still hates college and feels lost in the world. I'm continuing to work on myself to try and be a better person. We're both searching for solutions, but not everything is easily done. And, often, old problems don't so much resolve as they are replaced by new, more difficult challenges. Life continues on, for all the kindness and cruelty that concept contains.

The next step for us, however, is that Madison's going to switch universities and give living with me a try. We're selling it to my parents as a way for me to support her through school. But the truth is, we're both just horny as fuck.

"You sure you want to do this?" my mom asked as we loaded Madison's stuff into my car. "I know you want to be a responsible big brother, but I'm pretty sure this qualifies you for sainthood."

"I don't think I'm that good," I said. I looked back at Madison, who gave me a knowing wink. "Just doing my best to take care of my MadMonkey."

"Well, if she starts to make you crazy, you have me permission to send her packing," my dad said.

Madison gasped in overdramatized shock, horrified at such a suggestion. "As if! Maybe he doesn't know it yet, but Aiden's stuck with me forever."

We finished packing the car and got inside. My parents waved goodbye as we drove off to the horizon. Somehow, our future felt assured.

Wait a minute -- brother and sister living happily ever after as a loving couple? See, I told you that this story was completely unbelievable!