Note: This story was dynamically reformatted for online reading convenience. A couple of weeks after I had first helped my sister have an orgasm, my family travelled to a rented cabin high in the mountains. We had been there before when we were younger but nothing sexual had ever taken place there. The cabin was built in the early 1900's and although it had running water and indoor plumbing, it didn't have a television. For fun, we would go explore in the woods or play board games with our parents. One after noon, Sarah and I went for a walk exploring in the woods a few hundred yards from the cabin. The forest was thick with trees and undergrowth and it looked like no one had been there in a long time if ever. We had been climbing over old trees and around rocks and finally stopped to take a break. It was quiet and we sat in silence for a minute or two. "Remember what we did the other day?" I asked Sarah. She looked nervous and began picking at stick she had found "What do you mean? She asked. "Like when I was touching you?" "Oh...... yeah, what about it?" she replied. "Well I was thinking about and you had an orgasm right?" I had been wondering ever since then if that was what happened. "Yeah..." she said softly her face turning red. "Oh, I was just think that that was really cool and I thought, like, if you ever wanted to do it again I to would be fun." Sarah sat quietly and didn't say anything. "And if you wanted to, maybe you could like help me have one?" "Have you ever had one?" she asked becoming more interested in the conversation. I told her that I had without exactly admitting that I had been jerking off. I asked her if she had ever made a guy shoot by touching them. She was almost 15 now and had a boyfriend that she liked a lot. "Yeah I have, it's kind of weird. We could try it I guess. It's only fair." I was so excited! The rest of the afternoon and evening went by so slow. I couldn't wait until everyone was asleep so Sarah and I could play. After dinner the whole family played monopoly which took forever. It was almost 11:00 before the game was over and everyone went off to their rooms to go to sleep. I changed into my blue basketball shorts and a grey t shirt and sat down on my bed. I was really anxious to go to Sarah's room, but I had to be careful and make sure everyone else was in bed for the night before I risked it. As I sat there I started to think about what was going to happen. My cock twitched in my pants imagining having my sister touching me again. She had played with me before, but I always held back ejaculating for fear she would wouldn't know what it was and be disgusted. At 11:45 I crept from my room down the hall and pretended to go to the bathroom. I flushed the toilet and stood in the hall listening for any sound of movement. Not hearing any I walked back down the hall, but instead of going to my room, I turned left down the hall to my sisters. I turned the doorknob slowly trying my hardest not to make any noise. When the door was opened I quickly slid inside and quietly shut the door behind me. "Sarah?" I whispered into the darkness. "Are you awake?" I was afraid she might have fallen asleep waiting for me. A soft voice whispered back, "Yeah get in...." I slipped under the comforter and between the cool sheets and slid next to my sister. My hand quickly found her stomach and I began to rub my hand in circles over her shirt. Slowly I inched my hand up her body and between her breasts; I continued to rub in circles around each breast and small circles around her nipples. I loved feeling them get hard under my fingertips. After rubbing her boobs for a few minutes, I slid my hand back down to her belly and began to slip my fingers under the waistband of her pajama bottoms. Careful not rush, I slipped my hand all the way inside her pants and cupped her entire mound. I could feel the heat emitting off her skin and knew that she would be wet inside. As I dipped my middle finger between her folds, a soft moan escaped from her mouth. Her smooth legs opened wider as I slid the length of my finger inside her slippery hole. Her hips moved in rhythm with my finger as I pushed and pulled in and out of her young body. She reached down and, in one motion, slipped off her pants exposing my hand to her entire lower body. As soon as her bottoms were off, her legs spread wide and I strained my hand to reach my finger deeper inside her. I continued to finger my sister as she began to buck her hips harder into my hand. Suddenly, Sarah reached down with her right hand and began touching herself. She had never done it before and it was astonished at how fast and hard she rubbed herself. In a matter of seconds her legs closed around my hand and her body shook and convulsed as her orgasm swept over her. After removing my hand from between her legs, I lay back watched her catch her breath. She kept moaning softly to herself with her eyes closed. Although I had removed my hand, hers was still pressed firmly against her crotch. It was strange and sexy to see my sister like that. After a minute or two, Sarah rolled over on her side and faced me. Without being asked she reached down and slid her hand into my pajamas. I gasped as her hand wrapped around my hard shaft and she slowly started to jerk up and down. Knowing I wouldn't have to hold back my own orgasm felt so liberating and I closed my eyes to take in the feeling. Having my sister stroking my erection was amazing, but my pants seemed to be in the way of her motion. I reached down and slipped them off quickly and soon, for the first time, Sarah and I were naked together. I lied on my side as we faced each other. With my left hand I reached around her and pulled her close to me. Our eyes had adjusted to the darkness and we both gazed into each others eyes with shock and wonderment. With her right hand he continued to stroke my hardness, as I slid my hand onto her ass and began kneading her butt cheek with my left hand. My hips began to move in time with her hand and the pace began to quicken. With every thrust, my hand pulled her body closer to mine. Her leg was now between my thighs and my scrotum was resting on her knee cap. I could feel the precum oozing out of me and down my head onto my sisters hand. The thought of her touching my semen made my head spin. I was getting close and I began to worry about what to do when I shot. I decided to just let whatever happened happen. I closed my eyes and gripped Sarah's butt cheek tighter, drawing her in closer. Then I felt it. By pulling her closer I had pulled her crotch next time mine and I suddenly could feel her pubic hair rubbing against the tip of my penis. I closed my eyes tight and thrust over and over again delighting in the feeling of her hair on my cock. After only a few seconds, my cock twitched and I began to shoot my sticky semen all over Sarah's stomach and pubic hair. I couldn't believe it. My head was dizzy and my mouth was dry. Sarah let go of my cock and I rolled onto my back. I looked over to see what her reaction was and was surprised to see her lying calmly on her back; her hand running through my seed. After a moment she reached over the nightstand and picked up a Kleenex box. Softly she wiped my semen from her skin and then got out of bed and put her pajama bottoms back on. "You better go." she said. As she walked out her door and down the bathroom. I got out of bed and put my clothes back on. Quietly I slipped back into my bedroom and replayed the night in my head. Please email me with questions or comments :) I would love to know what you think. steve_winters77@yahoo.com