I was disappointed by my husband's decision to live separately while I had to live with my daughter and son-in-law. At that time, I knew that my son-in-law, Taichi, was not sexually active and indulged in masturbation every night. I wondered if he could be tempted by his huge cock, thinking, 'I have to do something with it instead of my daughter.' Taichi, who couldn't resist the bold temptation of his mother-in-law, couldn't stay away from her.