Kanako has always wanted to have a child, and was looking forward to having raw, creampie sex with her husband on her ovulation day. However, when Kanako invites her into bed, her husband, tired from work, gives her a cold response. Unable to release her pent-up sexual desire, Kanako indulges in masturbation in the kitchen late at night. Her stepson happens to witness the scene and can't hide his erection at the sight of his beautiful stepmother. Suddenly, she looks up and notices her son's erect penis lifting up his trousers...