A little while ago, a friend of mine bought a house, and when she moved in she had a bunch of us over and we made it like a sleepover like we had when we were younger with everyone asleep on the couch and on the floor in the living room.
Sometime during the night, I woke up and heard something moving around across the room. After my eyes adjusted, I could tell that one of the girls had her pants around her ankles and was masturbating. I stayed still and watched her for a little while, but I wanted to finger myself too. I didn't want to embarrass her, so I made it seem like I was just waking up to do it. I pulled my pajama pants and underwear off and sat up to pull up my shirt. I could hear that she stopped, but I scooted against the couch naked, spread my legs and started rubbing myself, acting like I thought no one could see me.
I could see out of the corner of my eye that she was watching me and started rubbing again, so I let my hair fall over my face and started fingering hard. We both kept going for a couple minutes when I heard her take a deep breath and then pull her pants back up, but I kept on going. I could feel her watching me, so I started rubbing my hard clit with my other hand, really putting on a show for her. When I finally came, I let out a small gasp and sat there spread out for a few seconds before I got up to wipe off my pussy. When I came back, everyone else was still sound asleep, and she was turned the other way.
When we all woke up the next morning, we both acted like nothing had happened. It was a turn on doing it in front of someone else like that, and it was better making them think I didn't know they saw me. But the best part was knowing she was doing it too.