This girl and I had only been close friends for a few weeks when this happened. We had been spending a lot of time together. We always flirted with each other, always hugging each other or slapping each other's asses or blowing in the other's ear or on their neck.
It was obvious we were attracted to one another. We had the same off hour in school, so we would always go to this dark room no one ever was in to talk. We talked about sex, and she said that she used to have sex with this girl she used to know. After that, I always thought of her when I masturbated.
One day we had been extra flirty, and when we got to our private room, we started talking about what kinds of things turned us on, and about our experiences. Then we started imitating what we were talking about. First a suck on the neck, or a massage on the lower back. Then we looked at each other for a moment, and a second later she just rolled on top of me and started kissing my neck and licking my chest and sucking my nipples.
I rolled on top of her then and did the same thing, except I put my thigh between her legs and she started humping my leg. I was being a tease and then rolled on my back again. So she lay on top of me with a very daring, 'I want you' look on her face.
She kissed me hard and put her thigh between my legs, and I put my leg between hers, and we humped back and forth like that and I came. Humping gives me the best orgasms I've ever had. She came a few seconds later and made a wonderful coming noise. You know what I mean.
We both lay there for a little bit, and went downstairs with flushed faces and a smirk, knowing that no one knew what we had been up to.