There's a whole thread with lots of his stuff from Amazon and a bit from his Patreon at:
Tinto Selvaggio writes quite hard hotwife and cuckold stories featuring Richmond, a rich older man dominating couples. "Breaking Us Both" is the first series.

But yeah, hard cuck including bi-stuff isn't everybody's cup of tea though its very popular. From the feelings expressed by some on this thread it might not be popular here.
This story is one of the worst I've ever read. I had to force myself to finish both books. Saying that Tinto is a master at writing characters is a complete jokeāthe clichĆ©s are on a level I've never seen before, and the character development is utterly unrealistic.
You can't even call this hard cuckold anymore; it's
inhuman cuckoldry because the level of disrespect, cruelty, and humiliation is pushed to the absolute extreme.
Let's compare it to TA: Vaughn, the MC, makes Dan look like a newborn when it comes to being a wimpy cuckold. If you're looking for every humiliating kink imaginable to inflict on your main character, look no furtherāVaughn experiences all of them. By the end of the two books, he's barely even human anymore. What's even worse is that the author constantly shows us Vaughn's rebellious inner thoughts, only to have him contradict himself a second later.
Over the course of nearly 1,800 pages across both stories, he's betrayed, humiliated, and emotionally destroyed over and over again. Some scenes genuinely made me want to throw up (spoiler: he has
"SISSY CUCK" written on his body while his wife, wearing their wedding dress, has
"CUCK WHORE" written on hers, with the two of them being used side by side...).
Both wives start out as loving, very vanilla women, only to become cruel sluts who have absolutely no love or respect left for the MC. Of course, they both fall in love with the bull. One becomes completely submissive, while the other switches, but by the end neither of them has any real feelings left for the MC. The worst moments are when he tells them "I love you" and they either don't answer or respond with another humiliating remark.
And then there's the bull, Mr. Richmond. You thought Lester was a ridiculous character because of his almost omnipotent abilities, monstrous cock, and status as a sex god? Richmond makes Lester look ordinary. Lester doesn't have even 10% of Richmond's abilities or wealth. Richmond has every conceivable advantage: he's handsome, unbelievably rich, charismatic, much better endowed than the MC, possesses superhuman sexual prowess, and above all is a cruel sadist who enjoys destroying people purely for his own pleasure.
Finally, bisexuality is used solely as another tool to humiliate and break the MC, just like feminization and every other kink in the story. They're presented in the worst possible light, in an extremely negative way. At first glance, it might seem progressive or inclusive, but it's the exact opposite. The way these themes are introduced and used serves only to disgust the reader.
I had knots in my stomach and felt sick several times because of how inhumanly the MC is treated. The worst part is that he's been conditioned so thoroughly that, by the end, he's almost happy. There's still a tiny voice inside him questioning everything, but it's nearly been extinguished.
Yes, Tinto is a competent writer on a technical level, but his characters are so unrealistic and cartoonish that their development has neither logic nor depth. Simply humiliating and destroying the MC more and more isn't character development.