Worried about her pregnant daughter, my mother-in-law Ririko came from the countryside to stay with us in Tokyo. Instead of easing my wife’s stress, my carefree behavior made her angry, and she banned me from masturbating because she refused to let me enjoy myself alone. Days later, Ririko caught me sniffing her underwear in pent-up frustration. Having overheard our argument and feeling partly responsible, she offered to take her daughter’s place.