Bosses Wife

Over the last five months I've been fucking my bosses wife.
It was actually my boss who suggested and wanted it to happen, once he discovered I have a large cock.
He watched me fuck her twice on separate nights. The second time however he told his wife and I that was it. No more fun for us.
It had been a fantasy of his to watch his much younger wife being fucked by someone her age, who he knew he had a certain amount of control over.
Because that's his thing, control.
The thing is, his wife who's in her early thirties, is extremely fit and good looking, where he's fifty two, fat and has a small cock. She's too sexually energetic for him and loves large cocks.
So we've carried on fucking. I'm not an idiot as I know I'm just a sex toy to her, but whilst she still wants my dick down her throat, in her pussy and up her tight little arsehole, I'm going to keep on fucking her.