I was long distance with my girlfriend at the time, and going through a weird time.

I was staying over with some friends during that summer, and because of space I ended up sharing a bed with a guy friend [19m] and this gorgeous girl [19f] who was new to the group. Dirty blonde hair, incredible pale cleavage that she loved to put on display... she had been casually flirting with me for a day or two, standing very close, making prolonged eye contact, making dirty jokes, pressing up against me in the backseat of my friend's car.

We had a few drinks and all were crashing very late at night, so the group had to find places to sleep.

The bed wasn't too big, so we were practically spooning MFM, and while at first I was carefully keeping my arms to my sides or behind me, this girl would shift every so often to tuck her ass up against me, and it became clear she meant it, and my hands went to rest gently on her hips. The thought of touching her body got me hard right away and she felt it immediately and started grinding slowly and softly. We didn't want to wake up our male friend! I was at this point going down the road of this one night affair, and a young stupid mind and body want a lot without thinking.

She kept grinding against me and I slid my hand around to caress her stomach, then down into her waistband and felt soft little stubble from where she had clearly shaved recently. I was practically shaking with anticipation and forgetting to breathe as she guided my hand to her pussy lips, and I slipped a finger in, and then two. I started rubbing and circling in rhythm with her soft gyrating, both of us holding our breath and keeping an eye on our friend, if he made a sound or a movement we froze. I kept fingering her wet wonderful pussy until I felt her body quiver as she came. As casually as possible she turned over to face me without disturbing our sleeping friend, and started quietly but passionately kissing me with lots of tongue.

My hands went up under her shirt and found her perfect tits, beautifully round and soft, and she pulled up her shirt and guided my head down as she slid her hand over my cock and started to squeeze and stroke. I buried my face in the tits I had been sneaking glances at for days, taking her small nipples into my mouth and licking and sucking as she touched me until I came.

Our friend miraculously stayed asleep. Or so we think. The whole thing has remained secret for years, so either he really didn't know, or maybe felt/heard the whole thing and is keeping the secret. Maybe he enjoyed it ;)