This happened a few years ago when I was 15 years old. We were on a charter bus on the way to Oklahoma from North Carolina. We took a charter bus because it was cheaper than flying apparently. We were in a chorus group going to preform in Tulsa. It was like a twenty hour trip, so we were going overnight non stop and we had to sleep on the bus.
I always stared at Julie's body, she was slightly tan with nice boobs and the nice hour glass figure. Other people still considered me hot, but I still thought Julie had a better body than me. She was also 15 at the time.
It was really late and I could not sleep because there was no room to get comfortable. I had two seats to myself and she was sitting across the way with seats to herself. It was about one in the morning when I looked over and noticed that she was doing something naughty.
I looked over and saw her blanket on her lap and and her hand slightly moving underneath it in her crotch area, so I immediately knew what she was doing. There was enough lights from gas stations and street light that I could tell what she was doing. I sat myself in a position that made me look like I was asleep.
I was watching her for about five minutes and then she changed positions so that her legs were more spread but still under the cover.
I kept watching her and seeing her hand move and her chest go up and down faster and faster was causing me to get very wet. Finally, I saw her lift up her chest high and she was rubbing furiously. She was having an orgasm and was very quiet about it.
Once she finished, she turned the other way and presumably fell asleep. And by this point I was extremely horny. I stuck my fingers down my pyjama pants and went at it. I came once and then again. Those were some of the best orgasms I have ever had in my life.
And still today I can remember that night, and she has no clue about it.