Nubes de verano (2004) aka Summer Clouds
A married couple spend their summer holidays in a beach town. Little do they realize that a local Lothario hatches a plan to seduce the wife away from her husband.
Did She Cheat or Not?
Deepwater (2005)
A drifter has an affair with a hotel owner’s wife, but things might not be what they seem.
Marhulový ostrov (2011) aka Apricot Island
Did a guy bang his older brother’s bride on the morning after her wedding?
The Informers (2008)
A rich k..d shares his girlfriend with his other rich friends but gets jealous when he sees her enjoying one of their orgies without him and thinks that she is screwing one guy exclusively.
House of Glass (2021)
Convinced that her husband is having an affair with the neighbor’s wife, a woman’s obsessive search for the truth turns deadly.
The Kind Wife (2016)
A wife tries to have revenge sex with her woodworking teacher when she finds out that her husband is screwing their house tenant.
Happening (1981) aka Les Soumises
The description says that all the wife’s sex with different people (and groups) are just her fantasies, but they seem very real.. and very hot.. to me.
Terapia (Short) (2016)
A guy with a medical condition sometimes can’t discern whether a certain memory is real or is just a fantasy, like his memory of having an affair with his female therapist and the two of them getting caught in the act by her husband.
Hitozuma OL: Sekuhara ura genba (2011) aka Married Working Mom (2015)
A wife’s world becomes fuzzy as she confuses the world in her husband’s novel with the real world. In both the novel and in the real world, she has sex and/or gets graped by other people, including her co-workers, some theater guys, etc.
The Bye Bye Man (2017)
A guy, his girlfriend, and his black best friend decide to rent a house that seems to be haunted. He comes home one day and finds the two doing it doggy style. Is it real or is the haunted house playing tricks on him?