I fucked my wife's sister. I've known her nearly 30 years and though she's approaching 50 she still has the most amazing body. I had to drop something over to her house the other night when her husband was out and she came on to me, saying that she knew I always eyed up her sexy arse (she wasn't wrong!) and before I knew it we were having the most amazing sex. I've written a long account detailing exactly what happened - maybe I'll post that here sometimes. Anyway turned out she recorded the whole thing and has told me that I will have to satisfy her whenever she instructs me too, otherwise she'll start showing the video to whoever she wants. So now I am my sister-in-law's sex slave. I'm now permanently horny thinking about it.