Yuko's daughter Natsumi has gotten married, and the burden of being a mother has been lifted from her. However, Yuko is worried about Natsumi's lack of sex with her husband Eiji, and out of concern for her, she asks him about the situation. Eiji tells her how he feels, saying, "I can't get my mind off of you, mother-in-law." In order to mediate between the two, Yuko takes Eiji's stiff, erect cock into her mouth, and the situation is resolved. Since then, the relationship between the daughter and her husband has become peaceful, but Yuko can't get her son-in-law's erect cock out of her head...