My friend brought his girlfriend to stay at my house. They were both drunk and started making out in front of me. I could even see her unprotected panties. I was peeking at the two of them making out in the bath and she started giving me a blowjob and she noticed me peeking. When my friend got drunk and fell asleep, she said, "I was excited when you looked at me earlier," and showed me her breasts and panties and invited me. She's a bad girl who wants to enjoy the thrill of cheating with me while her boyfriend is sleeping. My overly erect dick was at its limit. She got on top of me and started fucking in front of my friend, so I couldn't stop it anymore.