My wife fell into my stepfather

It's been three months since my stepmother passed away. The Makise couple move to their husband's parents' house because their father-in-law lives alone. However, my husband tends to be on business trips and is not at home, so he hasn't had sex for a while. Furthermore, living alone with my father-in-law is unconsciously tense... Misa's stress and frustration combined with her housework have ended, and once she's finished, she has become a habit of masturbating. However, when he accidentally found out about this, his stepfather couldn't hold it in and sneaked into Misa's bed alone...