My brother in law Samuel, Sam, is a pure animalistic gay slut. He loves nothing more than having my cock slide over his tongue or up his always eager asshole. He knows his sister who loves him dearly, hardly ever gives up her mouth, pussy and ass these days. And he also knows because he's my wife's much younger half brother (Sam's twenty), he's able to stop over whenever he wants. After the first time I fucked him in our basement, I made sure nothing happened again for some time.
We'd been watching a movie together in the snug I'd built down there and Sam being Sam, he offered me a blow job. Which after a long time without sex, seemed like an awesome prospect. Once my dick was rock hard from his amazing oral knowhow, he said he hadn't been fucked a for a while and would I like to try. Not only did I fuck him over arm of the sofa we were on bareback, and came up his hole, I fucked him again as he rode me, once he'd sucked my dick back to life.
But I bottled it a little when my wife said her brother had really enjoyed the movie and the entertainment on offer. I thought she'd picked up on the fact I'd fucked him, but she said nothing more.
It was nearly two months later when my wife invited him over specifically to keep me company, as she was staying at her moms for a couple of days. Her last words before driving off, and I can still remember her saying them very clearly, were "Make sure you and Sam clean up after yourself. Oh yeh change the sheets". I didn't get chance to answer her as Sam came rushing in, but I did hear her say to him "Enjoy yourself and don't wear him out".
We didn't bother to watch anything when his sister left, going straight upstairs to bed. We spent the whole night having for me, amazing exploratory gay sex. And it was then I first sucked on a mans cock. It was all new to me and I found I was so in tune with his needs and my own, I was always ready to try anything he wanted. By the time his sister arrived back home, I'd fucked Sam any which way you can imagine and I'd also done something I'd never of thought of. In our bathroom as we showered together, Sam had me use some hair conditioner to smooth his asshole and then had me insert all my fingers, then fist up his asshole. It was one of the dirtiest sexual things I've ever done and I instantly adored the sensations it gave to me, and him. When I fucked him standing up in the shower that day, it was an awesome feeling and I stayed hard even after cumming deep inside of him.
My wife's comment when she came home was "Hope you boys enjoyed your fun. Sam will be round more often if you'd like". She's never said anything directly to me, but I now know my wife knows I'm fucking her half brother. After all as the other night proved, it would hard for her not to know. She slept in our bed as I fucked Sam in our guest bedroom. It was my wife who brought us coffee in the front room, and then said to Sam "Don't use up my hair conditioner anymore, use the lube you've ordered".