Because of my parents' remarriage, I suddenly got a younger stepsister who is a student and much younger than me. If I treated her like a child… it seemed to provoke her feminine pride, and she angrily shouted, "Don't underestimate me!" then lifted up her own skirt to show me her panties! In an effort to prove herself as a woman, she tried to make me hard, saying, "I can have sex just fine," and started rubbing her ass against me. Before I knew it, we were doing anal! If that happened, I'd insert it! Pressing my dick and her pussy together, in our state of excitement, we ended up having sex…!
