Last summer my parents forced me and my 12 year old sister to go with them for two weeks to a lake in the Adirondacks, and it was the last place on earth I wanted to be. They disapproved of my new boyfriend, probably because they knew we were fucking our brains out at every opportunity, and thought we could 'bond'. It was awful. There was a family at a house near ours with three boys, but the older two 19 and 21, were total assholes, and the youngest was only 15. I actually liked Billy, the youngest, who was a cute, sweet, chatty, Zach Efron clone. The second week, I was sitting by the lake with the three boys, and the older two were teasing Billy about being a virgin for the rest of his life, and the poor kid was so mortified, I thought he would cry. I picked up my stuff, looked at the oldest brother, and said 'Trust me, Billy is no virgin', and walked away. The silence was priceless. I looked over my shoulder, and Billy was beaming, and his brothers speechless.
I was incredibly horny at that point. Nine days sharing a room with my little sister, I needed to get off in the worst way. I decided to get some privacy by hiking into the woods, find some privacy, and then getting off.
Unfortunately on my way I ran into Billy on the trail, who thanked me profusely for fucking with his idiot brothers, then excitedly told me about a waterfall and small pond he had found, and wanted to show me. We hiked back and sure enough it was pretty, and we waded into the pond Billy took off his shirt and got under the waterfall, and as I watched his smooth muscular chest and arms get covered in cascading water, I could feel my pussy throb. I thought WTF, and joined him under the waterfall. I put my hand on his chest and stroked it down to his stomach, I whispered in his ear, and told him I wanted to jerk him off, and without waiting for an answer, I thrust my hand into his shorts. I found his dick, and it quickly arose to a very nice size, as I put my hand around it. I undid his shorts and slid them down, and his dick bounced up and hit his stomach. We moved to the side of the pool, and I started to slowly masturbate him. I played with his nuts, rubbed his chest, and slowly fisted him to an orgasm, and he spurted his cum all over his belly and chest. I doubt he lasted more two minutes from start to finish, but I loved watching him have his first orgasm with a woman, and it made me wet. I rinsed off my hand, and stood up, and slipped my shorts off. I sat down next to him, and guided his hand into my crotch. He had no idea what to do, so I spread my legs, and instructed him on how to get me off. He was a quick learner, because soon I was very wet, and he was torturing my clit with gentle rubbing. I begged him to go faster, and to finger fuck me, which he did. I had a hard orgasm releasing a weeks worth of pentup horniness. Billy had such an angelic look on his face, and all he could say was 'wow'. I looked over and saw he was hard again, so I stroked him off again, this time it took almost 10 minutes before he erupted.
We went back to the beach, and I felt so relaxed after getting off. His brothers were there, and instantly started telling me I bullshitted them about Billy. I looked at the older brother again, and just said 'Ya think?... if that's the case how would I know about Billy's cute birthmark on his HUGE nutsack?' Billy and I both giggled, and they didn't bring it up again the rest of the week.