My friend brought his girlfriend over to hang out. The three of us had a great time drinking at home, and before we knew it, we had missed the last train, so we ended up staying the night. Soon, the boyfriend fell asleep, but his girlfriend was in bed because she couldn't sleep because of his loud snoring. I couldn't resist her big boobs, which I'd been interested in for a while, so I started playing around with her. Of course, she found out, but then she said, "Do you want to touch me? Sure," and "But don't make a sound, or I'll wake you up," and things took an unexpected turn! Was this a dream or an illusion? She even rubbed my dick over my clothes, making me completely aroused! "She's already asleep. If we're in bed, no one will notice, so..." and we even had sex! I couldn't help but feel guilty about having sex with my friend's girlfriend!