I was home alone with my cousin who came to visit me. When I was peeking at her getting changed as she was about to take a bath, she invited me to take a bath with her, saying "Everyone is out, let's take a bath together." We're both adults now, so it's crazy. She pretends to wash my dick and gently handles it, which makes it hard. In return, I pretended to wash her grown-up breasts and her wet slit, and ended up touching them a lot. Touching wasn't enough for either of us, so we licked each other. We're adults, after all. Our sexual desires were unstoppable and we even had sex in the bathroom. We're adults, after all.