Sex education for stepmothers who gently and vigorously manage their husband's stepchild as they become sexually awakened

Momoko married a man with a stepchild. Although he wanted to become friends with his son-in-law Yuta, he still had a distance from him. However, when I ask Yuta, who has been suffering from a decline in school grades recently... He couldn't help but endure his sexual desire and was obsessed with masturbation. In response, Momoko, although she is step-student, puts her body in the way of giving her son sex education. Yuta repeatedly ascends as she is through her stepmother's ejaculation control education. Thanks to Momoko's efforts, the distance between the two gradually narrows...