My Sister and I were sent to live with one of our Uncle's and his wife one summer. There was something going on between our parents and someone decided a little time away from us would to them good. I found out later on my Dad had a drug problem and while me and my sister were away he went to Rehab.

Anyway I wasn't born with looks, I'm not butt ugly, but a woman would never give me a second look unless she was looking below my belt. I didn't get looks but what I did get was a rather large cock. Measuring it once being hard, about eight inches.

My Sister at the time was 17yo and I was 15. So here we were out in the country, not on a farm, just homes spread out from each other. Not much to do, but there was swimming at a lake nearby. So we spent a lot of time at the lake and in the water, sometimes there would be a few other people there, sometimes just me and my sister.

One day we had got out of the water and my sister wants to ask me a personal question. I say yeah and she looks at my cock that is obviously seen because of the wet bathing suit. So she asks what it's like when it gets hard? So I'm like well it's hard and bigger and I really don't what else to say about it.

I think she was going to ask me something else when a car pulled up and a family with kids got out of the car. The little kids ran down towards us and that pretty much ended that conversation.

That night I was laying in bed when I heard a soft knock on the door. I figured it was my Aunt Ruth, sometimes she would check on me and my Sister. However, looking at the clock it was past midnight and my aunt was in bed by now for sure.

I said to come in and my Sister appeared in the door. She closed the door quietly and came and sat down on the other bed opposite of mine. This wasn't unusual because sometimes we did talk late at night, if nothing else just out of boredom.

We talked about our folks and what the deal was sending us here for the summer, at the time neither of us had a clue about our Dad having a drug problem. Then we just talked trash and insulted each other the way a brother and sister usually do.

Then suddenly my Sister brings up the subject of the conversation she had started at the lake earlier that day. Then she asks me if I had sex yet? I told her no, and asked if she had sex yet? She said she had done it about six times, twice with her first boyfriend and four times with her current boyfriend.

Now when you are 15yo it doesn't take much to get things stirred up, and this conversation was stirring things up and quickly. The bedroom was pretty dark but I brought the covers over my waist because I could feel my cock trying to get big.

Then my Sister says she wants to see it. I'm like no way, but under the covers my body is saying yes. She promises not to tell anyone and won't ask me ever again if she can see it one time. By the time it came to deciding what to do I was pretty hard already, I could feel it had already sprang from my underwear and was pinned against my thigh.

My Sister just sat on the other bed for a moment waiting for me to say yes of no. I just took the covers and pulled them back. My Sister came off the bed and walked over to mine and just leaned over and looked.

She whispered OMG as she saw it trapped between my underwear and thigh. She had her hand over her mouth as she stared at my cock for several seconds. She asked if it hurt when it was that big and I said it only hurts if I don't cum. I told her not to ask because I didn't know why either. All I knew if I got hard and didn't cum I would be in horrific pain down there. I did not know there was an actual term for the condition called "blue balls."

So my Sister says so now what are you going to do? Well at that point I hadn't given it much thought with my Sister standing there, obviously I was going to have to relieve myself after she went back to her bedroom.

Then without a bit of hesitation she says she wants to watch me? I'm like hell no, I'm pretty damn embarrassed as it is. Then she just sits on the bed with her arms folded in front of her and looks at me. So I say fine, I just get back into bed and pull the covers back up, mean while my cock is so hard it almost hurts.

I may have not had sex with a girl but I had seen a few magazines and a stashed sex tape my Dad thought he had hidden away. I figured I would get my Sister to leave, so I turned over and looked at her for a moment. Then I just said what was in my mind. I told her I wanted to cum on her breasts. She just looks at me and says that her boyfriend likes to do that too. I watched my Sister stand up and remove her T-shirt and bra and sit back on the bed waiting.

Her breasts were perky and when she leaned backwards, placing her arms behind her to prop herself up they looked even more enticing to me suddenly. I kicked the covers off and got out of bed, pulling my underwear off almost at once.

My Sister wasn't my Sister anymore, she was the girl in the Magazines and in the XXX Video that my father hid away. To a 15yo that never had sex and was rather endowed, ethics and the moral way of life no longer meant anything to me.

I stood in front of my Sister almost between her legs and began to stroke my hard cock. The feeling was more than it had ever been the other times I masturbated alone. I don't remember looking at my Sister's face or her breasts as I jerked my cock feverishly. I seemed to be lost in the pleasure of the moment.

It didn't take long, I could feel that sensation building quickly. I jerked my cock faster and harder until I knew the moment was there. Now I remember looking at my Sister and seeing her mouth open as if she was somehow shocked at what she was seeing. Her nipples now looked different, as if they were bigger somehow.

I came with this overwhelming release that is rarely duplicated to the same intensity as the very first time I masturbated. But this time I knew I had reached that same plateau. A thick rope came shooting out of my cock and hit my Sister on the face and neck, everything else hit her breasts and wherever.

I just kept stroking my cock for the longest time, trying to appease the desire that I had been holding back. It came out in large droplets now, mostly the cum landing on her lap on her blue jeans she was wearing. I could barely stand and I looked down at my Sister that seemed to be in disbelief at what she just saw.

She had cum everywhere and luckily I had a towel from my earlier shower. I wiped my cum from her face and handed her the towel to finish cleaning up. The bedroom suddenly smelled like cum and I opened the window trying to get the smell out of the bedroom. We rarely talked of that night afterwards and I was glad.

On my 21st birthday my Sister called to say she was taking me out to celebrate, a new club had opened up and I wanted to party also. My Sister arrived and she looked great, a black dress with heels and a few guys hit on her while we were there.

Glad we took a cab because I was buzzing good and so was my Sister I'm sure, she had more to drink that I did at the club. I gave her the spare bedroom and I was getting ready for bed when there was a knock on my bedroom door.

I opened the door to see my Sister standing there and she just put her hand on my chest and pushed me backwards. Before I could say anything she just reached up and slipped her black dress off her shoulders and stood there naked in front of me.

After that night at our uncle's house my Sister told me she needed to know what a "big one" felt like. She reached down and began to rub my cock through my underwear, I didn't try to stop her. Once she had me hard we made our way to the bed. Thankfully I wasn't too far gone to remember it was my Sister I was going to fuck. I reached into the nightstand drawer and pulled out a condom.

When I entered her she dug her nails into my Arms so hard I thought I was going to need some stitches. Her voice filled my ears with her sounds of pleasure. I pushed my hardness into my Sister until I couldn't go further. Her body writhed under me as I fucked her slowly. Then she began to breath harder and faster as I began to thrust into with sexual hunger.

Her nails clawed my arms and back, her voice becoming louder by the second. She came twice within a few minutes, once again I felt the urge of release. I know I hurt her a few times thrusting into her, she would squirm and then suddenly jerk as I went too deep. I couldn't help it and maybe in some way I didn't want to. The ultimate taboo having sex with your own Sister, it did arouse me I can't lie about it. And what made it even more erotic is the fact she came to me wanting it.

I blasted my load into the condom a few moments later, my Sister below me soaked in sweat as I rammed my cock into her until the pleasure of my release finally passed. She lay there below me with her eyes closed and this grin of pleasure on her face. I slowly pushed my cock into her a few more times, enjoying the way she squirmed under me.

We both fell asleep in my bed a short time later. The morning arrived and my Sister had gone already. I found a note on the breakfast counter with a smiley face with a hand drawing picture of a heart.

That was four years ago and we haven't been together sexually since that night. I don't know about my Sister but honestly I wouldn't say no if she came to me again in the future........