Mother-in-law, much better than my wife ... Good Miki - Yoshii Miki (Ryoko Izawa, Miki Yoshii)

Miki Yoshii, the mother-in-law, is visiting her son Masao and his wife Sanae. She's a great cook and takes care of them, but Masao can't help but feel attracted to her. As they spend more time together, Masao's desire for his mother-in-law grows, leading to a taboo and forbidden relationship. The central kink is the incestuous affair between Masao and his mother-in-law, Miki Yoshii, while his wife Sanae is unaware of their actions.