Moebius (2013)
2013A son bangs his father’s mistress and his mom gives him a hand job and would have had sex with him had his father not stopped it.
Incest
The Dark Side of Love (1984)
1984A bride cheats on her wedding day with her stepbrother.
Murmur of the Heart (1971)
1971This loosely plotted coming-of-age tale follows the life of 15-year-old Laurent Chevalier as he stumbles his way over the burgeoning swell of adolescence in 1950s France. After having his first sexual experience with a prostitute and dodging the lips of a priest, Chevalier contracts a case of scarlet fever. When the fever leaves him with a heart murmur, Chevalier is placed in a sanatorium, along with his over-attentive and adulterous mother.
Silent Incest, Your Father is in the Next Room… Yui Hatano [VENU-224] (2012)
2012A son fucks his mom while she has an ongoing video chat with her husband.
What Every Frenchwoman Wants (1986) aka L’iniziazione
1986A horny teenager fucks their maids, his virgin aunt, and his sister whose fiancé has gone off to war.
Jan Dara (2001)
A stepson rubs some ice on his stepfather’s mistress’ back because of the heat. Well, things get heated up more instead, and it leads to them having sex.
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.