The following submission's is not written as a story but is simply a fantasy that has been fulfilled.
My girl and my roommate
My girl has chatted with my roommate Matt a few times to get him to lighten up some and feel more comfortable around her. He was in the kitchen and they talked for a half hour too. She was on the couch in the living room, I was laying on the couch with her. He couldn't see me. My balls were trapped in a padlock and she had the rope tied to the padlock, pulling on my balls, pressing her feet into my balls squeezing them. She tortured my balls the entire time she was getting to know Matt. He has no idea my girlfriend is a whore or anything.
One afternoon, my girl had a client come over to fuck him in my room. My roommate Matt was in the kitchen cooking. They had to walk through the kitchen to go to my room. I was chilling in the living room watching TV. When they finished, she came out wearing only a towel and walked her client out. She walked through the kitchen to make sure Matt saw her. She went back into my room, I went in with her. She cleaned herself up and then told me to come watch as she walked back out to the kitchen in her towel. She loosened it up before going and I followed her out pretending like I was getting something out of the fridge.