At the request of a man with a cuckold fantasy, his wife is invited to film what she believes will be a private record of the couple having sex. When her husband cannot get hard, another man is introduced as his stand-in. She agrees only on the conditions that there will be no deep kissing, no blowjobs, and they will merely pretend to have sex—but after another man's cock keeps rubbing against her pussy, will she cross the line and cheat?