KAORI's married husband already has an adult son, who initially lived apart, but recently began to live with him. The family was good and we had a good relationship with each other. My husband was older and didn't have a lot of night life, but the number of times he started living together had decreased dramatically. I didn't mean to care about KAORI, but it was becoming more and more common for me to suddenly become horny. One day, KAORI, whose son-in-law came during training. What I saw there was a horse-like dick that insisted through tight pants. No way, KAORI, who doubted his eyes, sneaked into him while taking a bath and confirmed that it was not a mistake. At midnight when people fell asleep, KAORI headed to his bedroom. He takes off his sleeping pants and is fascinated by the sighingly nice male genitalia. I intended to secretly return to my room so as not to wake it up, but KAORI, who couldn't stand it, contained a groin that was getting bigger little by little. The boy, who woke up to the discomfort of his lower body, was surprised that his mother-in-law was sticking to his crotch. However, KAORI who is excited pushes her crotch against the already wet horny part and sucks it all the way to the back. KAORI has reached the top at a stretch to the glans that pierces the back and scrapes the vaginal wall.