Help Me Find A Story Please

I am looking for a story read several years ago. It is about a couple (not married) and another guy. The other guy uses a hidden video camera to take pictures of him having sex with the guy and the girl. The other guy gets the boy friend to beg to suck his cock and he gets the girl to perform acts she does not do with her boy friend. Later he shows the videos to both of them at the same time. Its a long multi part story. I'd like to find it if possible. thanks