Three weeks back my sisters husband called by my apartment, something he usually never does on his own. He's always known I'm a bisexual guy and that was the reason he'd called by. He quite simply asked me if I'd consider having sex with him. More to the point, he wanted to know what it was like to be fucked by another guy.
He went on to tell me he and my sister had had sex which involved her using a dildo up his ass, and now he wanted to know what it felt like for real.
I was extremely reticent at first, but his insistance and my hardening cock, my libido got the better of my head and after showering together, we ended up on my bed naked.
Over the next two hours I had an incredible time wit my brother in law. It was obvious his ass had been fucked by something before, because thrusting my eight and half inches up his rear really wasn't too tight. By the time he left to return home, I'd fucked him three times, the last time as he leant over the balcony of my apartment over looking the night sky and the streets below.
He's been back four times since and each time we've gone further with our sexual expressions together. He's a real out and out bottom and I have to admit, he's probably the most sexually erotic guy I've had sex with.
My dilema now, is how do we carry on knowing he's my sisters husband and should we be fucking one another at all??