"Stop it, you've gone mad to get turned on by a middle-aged woman like your mother! If we do something perverted like this as mother and son, it'll be incest!" When the father leaves, the mother and son are alone in the house. The son, who has a fascination with older women, becomes aroused by his mother's body and attacks her. The mother, though she knows it's wrong, becomes wet and finds pleasure in the transgression.