With my wife, Takako, pregnant, my mother-in-law, Mihana, came to stay with us from her hometown. While she helps out with chores like cooking and laundry, our relationship as a couple has been deteriorating day by day. One day, she even forbade me from masturbating. Day after day, week after week, I endured and suffered, but Mihana, seeing my struggle, gently touched my crotch, saying, "You're not forbidden from having me do it for you, are you?" Since that day, my mind has been consumed by Mihana, and one day, when I saw her cleaning and became aroused by her ass...