When I was 19 my girlfriend at the time and I were staying at my friends home. We fell asleep in the spare room and when I woke up during the night she wasn’t in bed with me. I could hear the sound of a rocking bed in his room. I got out of bed and quietly opened his door. The room was dark, but I could see that they were both completely naked he was on top of her in the m******************.

My girlfriend was biting her wrist to stop herself moaning my friend was slamming his body into hers. His parents were in the house so it wasn’t just me they were hiding from. After about 10 seconds I left the room. I didn’t confront her about it until the next day when we left their home. They had been having s** for weeks. They are married now and have two kids.