That JAV

My husband had a stepson. His name was Yuta, and at first he was an honest and good boy. But after we came to live together, he started to miss school more and more, started to play with girls, and gradually his behavior became worse.... Then I saw Yuta-kun masturbating with a picture of me. Could it be that Yuta had changed because of me? Just as I was thinking that, while my husband was sleeping, Yuta-kun pushed me down... and we had a physical relationship.