My husband had a stepson named Yuta. At first, he was honest and well-behaved, but after we started living together, he began skipping school, picked up an interest in girls, and gradually started getting into trouble. One day, I caught Yuta masturbating while looking at a photo of me. Just as I started worrying that perhaps his strange behavior was somehow my fault, I was suddenly pinned down by Yuta while my husband was asleep, and before I knew it, we had become physically intimate.