In order to take care of my pregnant wife, my mother-in-law Mariko came to Tokyo from my wife's parents' house. His relationship with his wife is supposed to be good, but when he asks for a pregnant wife, it becomes dangerous, and even an abstinence order is told. One day, Mariko gave me a massage because I was abstinent and I was not feeling well, but I couldn't stand my unprotected chest and got an erection. Mariko who noticed it should also massage here with a bewitching expression? And I made an immoral proposal ….