University [f]un – he thought the roo[m] was empty, but it wasn’t

During one of my early years at university, I (like so many before me) had to share a room with a roommate. Becky was incredibly pretty, a blonde who liked low-cut tops and mid-shelf vodka. I’m Asian, with long dark hair and a preference for short skirts paired with whisky. We took to each other instantly, and were trading clothing and going out to the club within minutes of meeting each other. Unfortunately, we had been assigned one of the smaller rooms on the floor, but we used extra stacking furniture to raise our beds close to the ceiling and create our own working desk areas underneath. We had minor roommate squabbles just like anyone else, but we got on well. Although we had both wanted to stay single to have fun for a while, Becky started dating her boyfriend Mark only two weeks into the start of term. He didn’t live in our building, but ended up a constant fixture at our place.
I came back one afternoon to our empty place after a lecture to take a nap. I had been out late the night before, and after pulling off all of my clothes but my underwear, I climbed up to my bed and fell asleep quickly. I woke up an hour later, groggy and confused to some odd noises coming from Becky’s desk across the room.
Becky was in class, so I knew it must be Mark. It wasn’t strange for him to be in our room without her – he had a key, and often came over to do work or just hang out. “But what the fuck is he doing?” I thought to myself.
And then I recognised the sounds – he was jerking off. The way that the beds lofted, it was possible when sitting at the desks to not realise someone was in the other bed if you weren’t paying attention. I was curled up facing the wall, and he must have thought that the room was empty. And judging by how long it was taking, he seemed to be either be continuously bringing himself to the edge and backing down again, or going for the Olympic gold medal in masturbation time.
I lay there frozen in place, tangled in my blankets listening to his grunts. I had no idea what to do. I wanted to let him finish (clearly he needed it), and didn’t want to embarrass him by interrupting and revealing that I knew what he was doing. But I had to climb down and get dressed for a meeting soon, and I was practically naked. I thought perhaps if I could help him finish quicker, he might leave or at least not be have to be caught in action.
Immediately, I thought of a plan to hurry things along. I quietly inched towards the outside edge of the bed, laying on my side but still facing the wall. Then, pretending to still being asleep, I stretched loudly and manoeuvred in such a way that the blanket pulled forward that exposed my ass and uncovered back. I’ve always had a firm and rounded butt, which isn’t typical for a slender Asian girl, but I did yoga regularly which helped. I’d even seen Mark glance at it several times when he thought Becky wasn’t looking. I knew it looked good, especially with my cheeks half-exposed in a pair of black lace panties. I knew he’d have a great view, since there was only a thin railing on the bed.
I heard Mark stop immediately as it dawned on him that he wasn’t alone. The room went quiet, and I could practically feel the tension. But I kept up the pretense, breathing deeply to show I wasn’t awake. After a few minutes, I heard him start up again, but cautiously. There were slow squelches from whatever lotion he had been using before. As I heard his breath quicken, I could feel myself start moistening knowing he was looking at me. I surreptitiously crept a hand towards my bare nipples, cupping a breast and brushing in slow circles with my thumb. I could tell he was trying to be quieter, but the silence in the room just amplified every noise on his side. Eyes closed, I imagined him holding his cock and found my breaths matching his every stroke. I moved my other hand down past my stomach, resting just outside of my mound. The cool air on my backside contrasted the warmth I found below. Using two fingers, I lightly started rubbing in an up-down motion. I paused for a second to dip a finger into my pussy and had to suppress a gasp at how wet I was. I could feel an empty ache there with a desperate need to fill it with something, but knew I couldn’t risk too much noise or movement. I resumed massaging my increasingly sensitive clit, slightly parting the folds and making small circular motions on the exposed area. I heard Mark’s panting go ragged as he neared climax.
I added more pressure on my own hand between my unseparated thighs, creating waves emanating from below. There was an unbearable urge to clench through the rising throbs, but I couldn’t flex my lower muscles for fear of Mark seeing the tensing in my ass. Instead, I made another sleep-like stretch, bringing my knees up slightly and arching my back even more to emphasise the roundness. I could feel the lacy edges of my panties ride up, exposing the full cheeks. Mark’s breath quickened, and suddenly there was an audible moan as he came. The unexpected groan abruptly pushed me over the edge. It hit in a surge. I had to quickly bite the edge of the blanket near my mouth to stifle a moan, and to prevent myself from visibly shaking as I rode it out. There was silence from below, and I squeezed my legs together, waiting for some indication of movement. Thankfully, Mark left the room almost immediately and I could climb down and get dressed. I did, however, keep the damp panties on for the rest of the day.

Source: reddit.com/r/gonewildstories/comments/5xy0wt/university_fun_he_thought_the_room_was_empty_but