I've been married twice. My first wife left me with our son after three years of marriage. I re-married when I was 28 and got a stepson out of it two years older than my biological son.

Three years ago, my ex-wife decided that I could "give our son a proper role model" and signed over custody out of the blue. My son was terribly depressed for a week afterwards, which we felt was normal when one's mother basically throws him out at age ten.

He always got along with his stepbrother when they would meet at holidays. Now he followed him around like a puppy. Then, a month after he arrived, he asked me, out of the blue, how I felt about homosexuality.

It turns out, after a few questions, that my son had discovered the joys of gay sex thanks to a sleepaway camp and the older brothers of some of his friends. His mother said there was nothing wrong with "other people" being "fags" but "not her son". Finally she couldn't take her son having "special friends" any more and sent him to me so she wouldn't have to deal with it.

I told my son that I didn't care if he was gay or straight, as long as he was careful. I figured that he would grow out of it in a while anyway. Then he admitted that he had a crush on his stepbrother. I went and had a talk with my stepson, and he agreed that he would "let him down easy".

Instead, a day later, my wife catches them in the bathroom, her 12-year-old son fucking my 10-year-old son's mouth.

She said that she was just surprised and she would "keep an open mind". But we could hear them having sex through the walls and would catch them every day. And she was exploding sexually. We were humping like we were honeymooners again. She finally admitted that two guys doing it turned her on. Since the boys were doing it on their own, no one was being forced, and my wife was riding me like a pony, I gave them my open blessing and explained why. This made them begin flirting openly and even kissing.

Then came our first mother's Day since my son came to live with us. The boys gave her a "present" of a show, dancing and stripping and actually having sex in front of her. She was like a wild woman and the boys watched us in fascination.

It's been three years. My stepson is bisexual - he has a girlfriend but still has a physical relationship with his stepbrother. My biological son is gay, full stop. But he's careful about it, he's had only three lovers besides his stepbrother.

And my wife still loves watching them. And I still get ridden by her like a pony.

Damn fine arrangement.