6inchchub
I was 13 years old, my sister was 17, and I had been spying on her in the bath tub for a couple of years. There was a hole by the faucet in and on the other side was her bedroom closet, which had no sheetrock by that hole due to a repair to the pipes. I would listen for her to start filling the tub, then wait for her to go in to bathe. After a couple minutes, I would walk in her bedroom, quietly close the door, and lie down in the floor of her closet to peep through the hole which was probably the size of a silver dollar. She had light brown hair and small, firm breasts. Her pubic hair was pretty sparse, but always well groomed. Being 4 years older than me, she was always taller than me, standing 5'9" with a thin, athletic build. Well, at 13, I hit my final growth spurt and shot from 5'6" to 6'1" tall.

One particularly sunny day, she asked me if I wanted to go on the back roof to get some sun. Any opportunity to see her in her bikini was a yes from me. Our parents house had a covered back patio and the roof was basically flat, so we would lie out up there to get above the shade of the trees that would often cover much of our back yard. I got the extension ladder from the garage, carried it out and placed it against the roof. "Go head," I said, offering to hold the ladder for her. I stared at her sweet bum as she ascended the 9 or so feet to the roof. I could feel a stirring in my loins already, thinking that this could be very difficult to hide the lump that might appear at any moment, because after all I was a 13 year old walking hormone.

After we got on the roof, we laid out our towels and my sister immediately lay on her stomach and asked me to oil up her back and legs. I took the baby oil from her hand, straddled her hips with my crotch pressed against her ass, squirted some oil on her back and began slowly, methodically rubbing it all over her back and the backs of her arms. She let out a low moan when I rubbed her shoulders. "Sorry," I said, not sure if it was a good or bad moan. "No," she replied, "it feels really good." I continued to rub her shoulders, then down her back, and finally to her sides, where I desperately wanted to touch her side boobs. I could feel my cock beginning to come to life, so I hopped up and knelt beside her to oil up her legs. That didn't work very well, so I moved below her feet and began working my way up her legs. As I got toward the tops of her thighs, she parted her legs slightly, and I could see a wet spot forming on her light blue colored bikini bottoms. I oiled all the way to the tops of her thighs, brushing my finger tips against her wet spot. She moaned again, so I rubbed it a few more times until she asked me to stop. "We can't touch each other there," she stated very matter of fact. "Why?" I asked. "It's not right because we're family," she responded. "I think it feels right," I replied. With that, she told me to lie down on my back. I did as she said and she got up and straddled my hips, in a similar fashion to how I had straddled her ass, except now her wet, bikini clad pussy was pressing against my crotch.

She began oiling my chest, arms, and stomach, and I felt a tingling all over my body. Sensations I had never felt before sprang to life. My cock was now rock hard, at it's full with blood, pulsing through it, which she felt. Slowly she began sliding her pussy up an down against my erection. Her eyes closed, she stopped rubbing my chest, placing her hands on my ribs, she started grinding herself harder and faster against my hardness. "Sis, I think I'm gonna. . ." I started, but it was too late. I filled my shorts with cum, an orgasm like none I had ever had in my young life. I didn't think I would stop cumming. My sister didn't slow down a bit. She felt my cock pulsing as I orgasmed, and through gritted teeth she said, "Yes, yes, yes," grinding her soaking we pussy against my soaked trunks and still hard cock.

Suddenly, her eyes opened, she looked me straight in the eyes and moaned, "Uuuuuuuuugh, yes, yes, mmmmmmmmm." Her thighs locked tightly against my hips as her entire body began to shake from her climax. She shook and shook for what seemed like 5 minutes, but was probably 20 or 30 second. Then she stopped her motion, leaned forward, kissed me on the lips and said, "Thank you, baby brother. I needed that." The only words that came to mind were, "Any time you want, sis. That was the most amazing thing I've ever felt." She smiled, kissed me again, and said, "Now, let's see about that sun tanning we came up here to do."

I never even got my cock out and it was never directly touched by her, but fuck me if that wasn't the most amazing first experience with a girl I could have ever imagined. We did that a few more times over the summer, then she started seeing a guy, who eventually became her husband, and I was left literally holding my cock. I wouldn't trade it for the world, though, because we still look at one another across a room full of family and friends and she will smile and wink at me, knowing that no one else in the world is aware of that one day in the summer of 1981 when she and I shared an amazing time together.

BiDocAndVixie
Awesome srory. I aleays wanted a sister. And I love hearing about that special bond that some lucky siblibgs have together. That was beautiful. Thank you