An open doorway led into a back room. There were two couples slow-grinding under the glitter ball, a couple of guys with a curvy brunette playing pool... and three women on one of the couches chatting.I went over to the couch and my eyes lit on a redhead in a well-filled tube top and short skirt. I introduced myself as a first-timer there, and she agreed to help me feel like one of the family. I held out my hand and she pulled herself up out of the couch, tube top jiggling pleasantly, her head. I would wait to ask.I always hung out downstairs in the den, so I wouldn't hear my sister's and Andy's sounds. I watched TV and ate a snack.The doorbell rang.For a fleeting moment I thought it might be Brianna, but as I walked to the door I became realistic. It was likely just a salesman. I disinterestedly opened the door.I was greeted with a "Hi!"It was Alyssa, Alex's younger sister. She was a freshman so she was a grade below me."Hi," I replied automatically."Can I come in?" Uh ... sure." I. "We found out the reason he didn't leave was because he felt bad for sex chatting online. She told him she would let it slide, if he let her fufill a fantasy. She told him she wanted a three way. We were going to humiliate him. We told him to start, he was pathetic. She smoked and her and i made small talk as he tried his hardest. He kept on as she ignored him and his tiny cock. I pulled my hard shaft out. "You done ? " she asked him as she rolled her eyes and glanced at her watch.Pushing him. Slowly he lowered her onto his shaft, and I watched as the thick crown of his massive cock spread her open... He held her there, with just the head pressed against the lips of her pussy, and she writhed in pleasure and desire. She begged for his "big, fat cock" - wriggling to try to get it inside her... and every word pierced my heart. Eventually, he got tired of teasing her and just dropped her down - she screamed out as the cock pressed deep inside her... and as he held her tight with it.