I went to my friends house for a sleepover and found out it would be co-ed when I arrived. My friend's cousin was in town and she would be with us. We are all fifteen and I have known her for many years. We have both seen each other naked. Our plan was to watch some XXX vidoes and then go and jerk off in the bathroom.
When his cousin saw the video she asked what we did with it. When we told her she wanted to watch. After a few scenes I was covering up my hard-on as was my friend. I noticed his cousin was moving around a lot. When the movie was over she told us she was very wet and horny. She looked at us and asked if we were hard. She told us if we got naked she would too. I had seen my friend naked in the shower at school but didn't want to see him naked now.
She then told us she would be naked first but we had to jerk off in front of her. Before we could answer she took off her shirt, jeans, bra and panties. I almost cummed right then and there. My friend then stripped and so did I. When we were naked we looked at each other's body. The cousin had nice boobs and was starting to get pubic hair.
My friend was probably six and a half inches long and thin. I was five and a half inches long and thick. The cousin felt both our balls and started to stroke us. We were feeling her boobs, ass and vagina. The cousin told us to jerk off and cum on her. She sat in a chair and pulled us by our dicks to her. We both started to masturbate and she did too.
I could tell she was wet because she made squishy sounds. In a few minutes I told her I was going to cum and she grabbed my dick and pointed it at her boobs. I cummed on her left boob and my friend cummed on her other boob about ten seconds later. We watched as she masturbated herself to an orgasm. Watching gave both my friend and me hard-ons again. She told us maybe w could do it again later, but my friends mother came home early and we couldn't do anything.