It was the last few weeks of classes before summer break and my roommate's cousin had come to stay with us until the end of the term. There were lots of parties those weeks and one night we went to one in our apartment complex when my roommate was staying over at her boyfriend's apartment. We got home late and pretty buzzed from drinking and then went to bed.
Later that night, I got up to use the bathroom. When I opened my door I could see a blue-tint light filling the hallway from the kitchen. Our computer is in the kitchen and I immediately recognized that someone had left it on. Not thinking things through (I was still buzzed), I went toward the kitchen to turn it off. Oops. There was Devon, my roommate's cousin, at the computer looking at porn. I immediately took a couple steps back and backed around the corner of the hallway. I then peeked my head out to get a better look.
Sure enough, she was watching some video and had her left hand down between her legs. I couldn't see much, but it was obvious she was having some fun. I watched for a minute and started to feel pretty horny myself. The video was of two girls masturbating together on a couch. I couldn't hear any audio, but I could just make out the scene on the computer screen. It was pretty hot and I could feel myself begin to get tingly and wet. Devon moved around a bit on her chair and then looked like she slid her left hand up under her nightshirt and dropped her right hand down to between her legs. She was squirming in the chair and I couldn't take any more. I slid my own right hand down inside the elastic band of my panties and could feel the warm stickiness that had already leaked out of me. I thought Devon would cum any minute, so I wasted no time trying to catch up. I slipped two fingers inside me and they came out drenched. I smeared it all around my lips and clit and got busy. It didn't take any time at all and I was ready to cum. I tried to wait for Devon to cum too, but it was getting hard. I could feel my breaths coming in shallow bursts and knew I was getting close.
Just then, Devon lifted both of her bare feet up onto the computer desk and began to whimper. I could hear the sloshing sounds she was making and it put me over the edge. I gave my clit the never-fail motions and I entered into what was probably a two-minute orgasm. While I was doing everything I could to keep my legs from buckling, I saw Devon start to shake and make some muffled moans.
I quickly and quietly stepped back into my room and got underneath the covers, scared that she heard me and might come back to check on me. I was still quivering down there and knew I would remember that orgasm for many years to come. So far, I have relived that moment many, many times when I'm trying to 'put myself to sleep.' I hope by sharing it, you can help put yourself to sleep as well.