My mother-in-law, Lily, came to Tokyo from my hometown to support my battered wife before giving birth. I thought my wife would calm down because her mother-in-law was taking care of her, but my mood still did not improve and I was ordered to stop masturbating if I couldn't feel better. I was disturbed by the sexual desire that was building up day by day, and I lied to Lily that it was a Japanese custom and asked her to take my wife's place. Lily was embarrassed and ashamed, but gradually accepted my cock…