I had a stepson named Yuta. At first, he was a kind and obedient boy. But after we started living together, he started skipping school, picked up girls, and his behavior gradually deteriorated... At that time, I caught him masturbating to my photo. Could it be that Yuta's change was my fault...? Just as I was thinking that, my husband was asleep, and Yuta pinned me down... and we ended up having a physical relationship.