Unable to get a hotel room during a business trip, he decided to stay at his son's house... His son's wife, Reiko, has a lovely smile and big breasts that are very erotic. Even though he knows it's wrong, he can't help but fantasize about his son's wife's lewd appearance. His wife masturbates in a showy manner, and she gives him a gentle blowjob in the bath, and the father-in-law's fantasies grow and grow...