The father-in-law living with his son and daughter-in-law. The kind, beautiful, and hardworking 'daughter-in-law,' Yuri-san, had been taking care of him by driving him to the hospital and other things. Since he found out that she secretly masturbates during her chores, the father-in-law felt pained but also aroused. His son, who was so devoted to his wife, seemed unable to satisfy her in their nightly life. The father-in-law, feeling pity for his daughter-in-law, one day committed... a forbidden act!
