My mother-in-law, Rinko, came to Tokyo from the countryside out of concern for my pregnant wife. I thought that my mother-in-law would help ease my wife's stress, but my carefree attitude ended up making her angry. She also told me that she couldn't stand the idea of me being the only one getting pleasure, and banned me from masturbating. A few days later, I was feeling frustrated and sniffing Rinko's underwear when she saw me. Rinko had been listening to our argument, and perhaps feeling guilty, suggested that I take her place...