SPRD-1129 Stepson Strong Sex Drive Son Makes Stepmother Head Over Heels Shoda Chihiro

My husband is a divorcee, and I am his second wife. He has a child from his previous marriage who is already an adult. From my perspective, this child will be my stepson. However, since he is coming here on business, we decided it would be fine for him to stay at our house. On the night of his arrival, we excitedly had dinner with him and went to bed early. In the middle of the night, I woke up and heard some noise from his bedroom. When I peeked in quietly, he was masturbating. Since he is a young man, I thought it was understandable, but seeing his penis made my heart race. His member was incredibly large, and because he is young, it was impressively erect and curved... Embarrassingly, my husband and I haven't had sex in a while, and his member is on the smaller side, though it has always satisfied me. However, after seeing his, I couldn't take my eyes off it for a long time. The next morning, both my husband and he went to work, leaving me alone to do housework. But I couldn't stop thinking about what I had seen the night before, and I started having inappropriate fantasies. When I gently touched my private area, I was surprised to find it incredibly wet, as if he were penetrating me, and I ended up masturbating...