I was out in a local bar at a birthday party, I went to the birthday boys house party afterwards and his neighbour was in, he asked if I wanted to go into his house with him so i did, with me being naive and alot younger than him, we went straight up to his room, there was no messing about. We got straight into bed and started playing, he put a condom on and i got on top and started having sex, then i heard the door banging and someone saying his name, he then said he never locks the door I panicked, jumped up, got my clothes and jumped into the built in wardrobe, Someone came on up into the room, I knew who it was now, she was coming for her booty call, I could see through the gap in the door, i could see her got undressed and get into bed, he kept trying to say he didn't wanna have sex and wasn't in the mood obviously because he knew i was in the cupboard but she persisted and sucked his cock, she sat on his face, wanked him, sucked some more and got on top of him cowgirl, she was facing my direction I could see he had no condom on with her, if i closed my eyes I could touch myself and be aroused but I wanted the ground to swallow me up, she was moaning and making all this noise and i knew who it was so i couldn't even cum, he eventually came he literally pushed her forward and came up her back, she never even wiped it off. She got her clothes on and just left again after she got what she wanted. I stood still in the cupboard for another minute or two and he came over opened the door and grabbed me saying sorry and come on back to bed, I put my clothes on and left as I couldn't have had sex with him after, as he didn't use a condom and had her all over his face.