My mother-in-law, Shoko, will be staying for a few months to support my pregnant wife. Just when I thought that my girlfriend Shoko's frustration with my wife had been resolved, my girlfriend's wife caught me masturbating in her bedroom and ordered me to abstain. One day, Shoko-san gently hugged me, who was lacking energy due to her abstinence. She couldn't stand the sight of her defenseless chest and got an erection.