SPRD-1073 A man returns to his wife's parents' house and finds himself drawn to his mother-in-law. Keiko Koizumi.

Before returning to his wife's parents' house, a man tries to have sex with his wife, but is refused. He is frustrated by the lack of sex. At the parents' house, he notices his mother-in-law's big breasts, which are different from his wife's, and becomes aroused. Later, when his father-in-law is drunk and everyone is asleep, he finds his mother-in-law sleeping with skin exposed. He touches her breasts and genitals, gets her wet, and tries to insert, but it is hard. When she talks to him, he leaves the bedroom gently.