I had gone with a few friends of mine to a lake house for a little vacation, and after being there for three days with no privacy, I was getting really horny.
The last night we were there, I woke up in the middle of the night wet. I knew I didn't pee all over myself, my pussy was practically screaming at me for attention. I couldn't take it anymore, so I stripped naked and got out of the house as quietly as I could and walked out to the lake. I sat down in one of the chairs we had set up, spread my legs apart and started pounding my pussy with my fingers. I came in no time, but I hadn't had enough. I caught my breath and started rubbing my clit, making myself cum again in minutes.
I got up and started walking back to the house, but I still wanted more. I leaned up against a tree and started fingering myself again, making my juices run down my leg. I wiped myself up and licked it off my hand and went back inside. I couldn't believe it, but I was still feeling horny, so I slid back into bed and started rubbing myself off again. This time my legs were sticking up and I didn't stop until my mouth went dry and my toes were grabbing at the air. Finally spent, I slipped back into my bedclothes and went back to sleep.
The next morning when we got up, no one had any clue that I masturbated four times while they were sleeping.