Apartment Wife: Affair In the Afternoon

A working-class housewife is sexually unsatisfied by her husband. When she seeks extramarital relationships, her affairs are discovered by a brothel-owner who then blackmails the woman into working as a prostitute for her.

Drifter's Affair

Roman Porno from 1972.

Affair at Twilight

Reiko is an adulterous housewife whose lover is a foul-tempered yakuza gangster. After one of her husband's friends spies the amorous duo at a no-tell motel, the stage is set for murder.