Ryo lives with her daughter after her husband dies. Half a year ago, my daughter's marriage was decided, and I decided to live with my daughter and her husband as it was, and now the three of us are living a happy life. Except for one thing. One day, I got excited about the sex of my daughter and her husband and masturbated alone. - Her son-in-law saw it and had a relationship with her. I feel sorry for my daughter, but I can't stop having sex with my son-in-law. Before I knew it, I was attracted to my heart ...