Gibojiri: Musuko ga shitai yoru

義母尻 息子がしたい夜

Also known as 息子と寝る義母　初夜の寝床

Yoshino and Takashi have both remarried and have children. Since Yoshino came to live with them, Takashi's son, Shunichi, has neglected school and has been peeking into Yoshino's bedroom and bathroom. Even when he embraces his girlfriend, Hiyori, all he can think about is Yoshino. Filled with desire, he embraces Yoshino. Surprised, Yoshino runs out of the house. Then, by chance, she meets Furuta, with whom she had an affair in the past. He is transferred to Beijing. Furuta asks her to come with him and attacks her...