Stepmother’s Sin (2001)
A son caught his mother screwing a guy in their home when he was young. He develops a hatred for women, so he seduces his new stepmother to prove that she is also a slut like his real mother.
incest
Tinto Brass Presents Erotic Short Stories: Part 4 – Improper Liaisons (1999)
A niece bangs her uncle, her uncle’s new wife, her male cousin, her female cousin’s boyfriend, and the dog. Just kidding about the dog, but if her uncle has one, she probably would have.
NATR-139 Incest: Stepmom’s Temptation Yui Hatano (2012)
Yui Hatano plays as a horny stepmom in three different stories to three different stepsons. In the third story, she has threesome with her husband and her stepson.
Taboo Charming Mother (2003)
A wife has an affair with her stepson.
The Ages of Lulu (1990)
A husband blindfolds his wife before they engage in a threesome. She agrees to the threesome, but she doesn’t know that the third person is her brother.
Forbidden Homework (1992)
A film student invites a widow who is a former actress to do a film with him. He practices the film’s sex scenes with her. She gets seduced and they have sex for real. But is she just a family friend or is she related in any way to the student?
Spanking the Monkey (1994)
A wife broke her leg and has her son help her do things for a while, including assisting her in the shower. One thing leads to another and they have sex.
Tobacco Roody (1970) – USA
A wife is screwing the sheriff while her hillbilly husband is busy screwing their stepdaughter.