TOEN-28 Forbidden Incest: Keiko Isoyama, a 50-year-old mother-in-law who couldn't resist and laid hands on her son

One day, when her son-in-law falls ill and takes a day off from work, Keiko, wanting to do something as a mother, works hard to take care of him. Suddenly, something hard and erect hit my right hand. Even though I knew I shouldn't, I found myself clutching my step-son's penis and eagerly moving it up and down. From then on, we started having sex whenever my husband was away...