To support my pregnant wife, my mother-in-law, Sayuri, came to Tokyo from her parents' home. I'm in a cold war with my wife, and I'm not allowed to drink alcohol or masturbate, so I'm tempted by Sayuri's charms, but I've managed to keep my sanity. Then, one night, I confided in Sayuri about my troubles at work and in my personal life, and she gently stroked my head and let me indulge. But she didn't stop there, and she reached out her hands obscenely to my crotch, which was about to burst, saying she was sorry for causing me trouble because of her daughter...