With My Sister in a Tent

I ride these charity bicycle rides that last a week, sleeping in a tent along the way. One year, I dared my sister to join me on the ride and she agreed. I only had one tent which we both would share, and while for both of us at first that was a little bit of an awkward conversation, she agreed that it was okay and we decided to go with that arrangement. She didn't have any camping equipment of her own, so I supplied the tent, my sleeping bag and pad and hers.

My sister is five years younger than me, so she was 26 at the time. She is curvy with large, perfectly-shaped breasts. I've always thought she is hot and I remember when I was a child I tried my best to spy on her whenever I could. I was successful a few times, but those are stories for another time...

At the time, we hadn't ever done anything together other than drinking together and swapping some stories about our personal lives. We've talked about masturbation a few times, jokingly, especially about how often we both masturbate.

Anyway, we rode the first three days (of five) on the charity ride, joking and having a great time riding on our bikes. Both her and I are in pretty good shape and were easily able to keep pace with each other, even on some of the more challenging days.

By the third night, I hadn't been able to rub one out and for me, that's quite a long time. It was late at night and I was lying there, rock hard, just aching. I heard her breathing softly, so--assuming she was asleep--I reached down to my rock hard member as it was painfully straining against my underwear. I pulled down my underwear and started to slowly stroke myself.

I continued as discreetly as I could, but at some point I went crazy. My balls were aching. I started to speed up my stroking and I couldn't help the rhythmic sound that was coming from my sleeping bag. Since it was dark and I was becoming self-conscious of the sounds I was making, I slowly undid the zipper of my sleeping bag and pulled it back so that I was exposed. My eyes were closed and I kept them that way, figuring that if I got caught and she was offended that I could say I was just doing it in my sleep, which is something that has actually happened before.

I started stroking faster and was having amazing thoughts when all the sudden a faint light came on. I could tell that it was her phone, and while I wasn't sure she was pointing it to me to see what was going on, through my closed eyes the intensity of the light led me to believe my movement had probably woken her and she was wondering what was going on.

At this point, I had a decision to make: do I keep going, and play it off like I was just doing it in my sleep, or do I stop and cover up? I decided to keep going and put on a show. I am, after all, an exhibitionist and she was an attractive woman lying beside me and I needed to release.

So, I started putting on a show. Keeping my eyes closed, I slowed down, running my hand up and down my shaft, thrusting my hips a little bit, parting my lips. I tried to look as sensual as I possibly could.

And that's when I heard it.

Her breathing had become a bit more shallow and faster, and I heard a slow rhythmic rustle from her side of my three-person tent--not a foot away from me. That made me even more excited.

I sped up my pace a little. I stroked faster, still keeping my eyes tightly closed, moving my body in a way I hoped was sensual and exciting. The movement from her side of the tent picked up pace, and the light that I could barely see through my closed eyes seemed to jiggle. I heard her gasp.

I couldn't hold out anymore. The excitement of what was happening was far too much for me, so finally--with one last pump all the way down my shaft as I held my hand there--I started releasing. I could feel myself throb as I shot cum all over my stomach. I finally stopped and let my body go limp.

From her side of the tent, the rustling increased to a frantic pace. I heard a grunt that sounded like a stifled cough, then a large inhale and the rustling became even more manic. After only a second or two of that, I felt and heard her body straighten out suddenly, jerk a couple times, and then a large exhale.

The light went off.

I laid there a while before I got the courage to pull my underwear back up and pull my sleeping bag closed.

The rest of the ride went on and we both pretended like nothing ever happened. Until years later when we were drinking, I fessed up about being aware of what was going on. With a blush and a crooked smile, she told me she still thought about it from time to time and that it was one of the hottest things she'd ever seen.