Zelda (1974)

Henry and Zelda are a couple with peculiar sexual tastes. In order to have more freedom, they send their daughter Ingrid to study in a school away from home. They have a relationship with Ursula whose husband died in a car race but, after some time, when they get tired of her, they involve a black couple, Christian, a race driver and Clarissa in their erotic games. When Ingrid comes to spend some time home, her presence becomes the catalyst of profound transformations.