This is based on a true story.
---
I had never masturbated in the room before. I had always been so careful; whenever I really HAD to touch myself, I did it in the shower. But this night was different. I kept thinking about him and I got so horny that I couldn't sleep.
I looked to my right, at my dozing roommate, who appeared to be sound asleep. Her slender form was motionless. It was good enough for me. I had his image in my mind, and I slipped my hand slowly down my taut stomach and into my clean shaven pussy. I started slowly at first, savoring the slick, smooth skin beneath my fingertips. I was trying so hard to be quiet, and I was succeeding. My breathing, a little heavier than normal, was the only thing that was different.
And it felt so wrong. Touching myself with someone else in the room. I justified it by telling myself that it didn't matter; we weren't friends, anyway. In fact, we barely talked to each other, save the bare necessities. It was like the other didn't exist.
I made small circles on my clit now, and I gasped softly. I almost brought my other hand up to cover my mouth, but it had made its way to my breast, softly stroking my erect nipple. It had been less than two minutes, but already I was about to cum. I grasped my clit between my two fingers and furiously brought myself over the edge -- my bed started to shake and my breathing was ragged. My body quivered from the aftershocks of my orgasm and I continued to stroke myself, more lightly now, as my breathing died down.
And just then, I heard a curious noise coming from the other side of the room. At first I thought my roommate was having a bad dream, and kicking her sheets. But the rustling of the sheets came at regular intervals, and certainly wasn't a fearful or angry. Fear flooded through my veins as I first heard her, but I didn't stop masturbating. The noise continued; it was like a moving of sheets, every three-quarters of a second, and it took about twenty seconds for me to realize what was going on. She was masturbating to me masturbating.
Intense arousal pulsed through me, and my clit began throbbing like mad. I hadn't been this turned on in a long time. I continued touching myself, slowly, cautiously, unsure of where this was going to end up. I didn't look to my right; I was too afraid that we might make eye contact if she was looking my way. It was hard to not be pushed over the edge as I listened to her, and soon enough I was. I slipped a single finger inside of myself and felt my muscles contract as I came, and my bed shook once more. She stopped making noise soon after. I don't think she orgasmed, and I wondered how she could go to sleep after that. I didn't have much time to think about that, though, because I was exhausted from the exertion and soon drifted off.
I didn't think about it much for the next few days, but there was a definite tension in the room that wasn't there before. We went about our daily business, ignoring each other as usual. It wasn't that we hated each other, we got along fine in terms of being roommates, but we just had our separate lives. We were both very attractive, very fit girls, and I think there was an unspoken competition between us, as there seems to always be between myself and other attractive girls. We were also both competitive by nature, her being on the volleyball team and me being on the school's tennis team. We could have become good friends, I'm sure, but instead we chose to ignore each other.
In the meantime, I was getting farther and farther with the guy I had been lusting after, and I was in a relatively good mood. We hadn't done anything physical, but we both knew it was on the horizon. I thought about him again that night as I lay in bed.
You wouldn't believe it, but the exact same situation happened again. Now I knew for a fact that she was doing what I thought she was doing. To be honest, it was hot as hell.
I finally started dating the guy, and it went well for a few months, but ended up falling apart in the end. While I was dating him, we had regular, amazing sex, and I had no need to masturbate. We would always have sex at his place, and so there were no awkward interactions with my roommate on that front, either. But once we broke up, my hormones began to reel. I thought about what she and I had done in the past, and if I was brave enough to do it again.
I thought it was strange that she had never been the one to initiate it, but she was never the one to initiate anything. Any time we needed to have a conversation, out of necessity, I was always the one who had to start it. The amount of times she talked to me out of her own accord could be counted on one hand. She was very nice, and considerate to me, but that was about it.
That night I decided not to masturbate. I decided to try something different. There were only two weeks until school ended for summer, and it was getting to be stifling hot in our room. My dorm, old as it was, did not have air conditioning, and even though all I wore to bed was a camisole and basketball shorts, I was still burning up. I took off my cami and set it at the foot of the bed, so all I was wearing was my shorts and a lacy black bra. I slept on top of the covers, my long, toned legs spread across the sheets and my arms over my bare stomach. This was the first time I had slept in such an exposed way, because I was normally conservative about showing off my body, even though I was very athletic and had absolutely nothing to be ashamed of. I thought it would be interesting to feign sleep. I waited fifteen, maybe twenty minutes, and began breathing deeply. I wasn't sure exactly how I sounded when I slept, but I thought I was doing a pretty good job.
I was "deep breathing" for about five minutes when I heard my roommate making noise. It was the same noise I had heard twice before, and this time a little faster. It lasted so long, and I could feel myself becoming wet. I wanted nothing more than to touch myself, but I didn't want her to know that I was awake. She took so long to finish, almost twenty minutes, and I wasn't sure if she even did finish in the end because she was so quiet about it. The noises were a little louder, too, and I wondered if it was because she was facing me. I could picture her in my mind, gazing over at me from her bed, staring at my long legs and my soft breasts heave up and down in the moonlight. I was so aroused that night, but I didn't do anything about it.
The next morning I woke up and we again pretended like everything was normal. I went to classes and headed back to the room to pick up some of my books so I could go to the library and do homework. When I walked in the room, the first thing I saw was my roommate's thong-clad ass across the room. She wasn't facing me, and she was slipping on a pair of jeans. It was the first time I had seen her like that; she almost always changed in the bathroom. Did she do that on purpose? I walked to my bookshelf, grabbed my textbooks, and left as if I didn't see anything.
When I came back that night, it was already after 2 AM and my roommate was sleeping. I quietly got ready for bed and slipped under the covers. It had only been 10 minutes when I heard her.