With my Girlfriend and Her Roommate

My girlfriend at the time--call her Suzie--and I had been together for about three years, and we were both about to go to college--in different places. We arranged to spend the summer together by going to the same summer mathematics workshop (we were nerds). All participants at the workshop were assigned a same-sex roommate in a hotel. Different-gendered visitors were allowed, as long as the roommate didn't object. Suzy got to the institute a day before I did, and immediately became good friends with her roommate, Eva, who was going to the same school as her that fall. They agreed that I could sleep in their room. Now, Suzy was pretty good looking--about 5'3, 125 lbs, 34C, long straight brown hair. But when I arrived and knocked on the door, Eva answered. I was instantly blown away. She was on her way to the gym, wearing just a sports bra and tight shorts that revealed every crevice on her perfect body. She was about my height--5'11--with a toned athletic body, blond hair, big boobs (I later found out they were 36D), and a VERY curvy bottom. She introduced herself, and then left for the gym, saying "I'll be back in a couple of hours." I got a little bit aroused just looking at her, which made me feel bad, since I was there to see Suzy. "This summer is really going to test me," I thought. I started unpacking my things, and Suzy came out of the bathroom. Suzy and I hadn't seen each other in a while, so we kissed for a long time, and things quickly started escalating. I kissed her neck, cupping her boob in one hand while sliding down to her clothed crotch with the other hand. She let out a moan, and started rocking her pelvis slightly. I could feel the wetness and warmth emanating from her crotch. I peeled off her shirt and unhitched her bra, letting it slide off her shoulder. While I sucked her nipples, she unbuttoned her pants and slid them over her bottom, leaving her only in panties. She grabbed the hem of my shirt, ripped it off of me, and started feeling my hard-on through my pants. I helped her get my pants and undies off. I slowly rolled her panties down her legs and over her toes, and slid my finger into her pussy, rubbing away at her clit. Her scent was quite strong, and filled the room quickly. This had only been going on for about 20 minutes, when we heard the sound of the key card swiping our door and the latch draw back. I half-way removed my finger from Suzy by the time Eva entered the room, but we were both naked. I was very hard, and Suzy's scent was overwhelming. There was absolutely no question as to what was going on. "I forgot my ipod," Eva said sheepishly. Suzy responded "well, close the door and get it." Eva walked in, closing the door. She started searching through her suitcase, and said "you know, you guys don't have to stop--seems like you were having a good time, and I'm not uncomfortable with sex at all." I couldn't believe she said that--it would never occur to me to do anything sexual in front of another person, but the idea of it really turned me on. I put my hand back on Suzy's clit, and started circling again. Suzy yelped out in pleasure but then said "maybe we should wait till she leaves." I said "you know you're almost there" and I kept rubbing. Suddenly, her back arched up, her vaginal walls tightened, and she screamed to high heavens "YES." Suzy collapsed on the bed, panting. "That. Was. Amazing!" she managed to breathe out. Eva was just watching with a big grin on her face. Her nipples were visibly erect through her sports bra. Suzy turned to her and said "well, are you just going to stand there?" Eva's response was even more surprising: "you got me all worked up--would you mind if I, um, relieved myself?" Suzy said sure. Eva just slipped off her shorts and fingered herself intensely. Suzy and I just watched in awe. I started jacking off, but Suzy took over for me, with her mouth. I came just about instantaneously, and Eva came a few minutes later. After that, we all had many special moments together.