My sister's sexy ass

Note: This story is completely fictional!

The story began a few years back. I was 22 at the time, and my hormones were raging. My younger sister is 4 years younger than me, but we were pretty close. One day I accedently walked in on her naked with her back turned to me. I quickly closed my eyes and appoligized for walking in, but not before gazing upon her body. I had never seen a naked girl before, so as you can imagine it was embarasing for her to be the first.

When I got back to my room, I couldn't stop thinking about what I had saw. I got hard at the thought of her ass, and it made me sick. But for some reason I couldn't help but touch myself. I eventually forgot about it, but one day it came back to haunt me.

I had gotten over that inccedent by then, and didn't think about it. But then it happened again. I went into her room to try to find my iPod charger, and walked in on her naked. I quickly ran out and went to my room. It stunned me how much her body had matured over the last four years. Her ass was even sexier than before, and now she had what looked like DD's. Again, I couldn't help but jack off. This time it took longer to forget, but I finally did. A few months later I went off to college. I never came back for the holidays, because I didn't really feel like seeing my family.

Another four years passed and it was the day of my graduation. When my family came, I was really happy to see them. But then when I saw my sister, I froze. At 18, she was pretty much fully developed. Now it was obvious that she had at least DD's, and she looked like a girl you would see in a playboy centerfold. Somehow I managed to keep myself from getting a hard on. After graduation my parents, my two brothers, and my sister helped me pack and move my stuff. My folks said I could stay at the house until I got a place of my own. When we got home, my parents apoligized because they had to leave right away. My brother had a baseball tournament in California, and they were required to go with him. They said that they were taking my youngest brother too, because they didn't want me to have to deal with him and his rowdyness. They left the next day, leaving Melanie and I alone. I was tired so I went up to my room to take a nap. My sister came into my room and said she wanted to talk.
"Hey Dan, I need to talk to you about something."
"Sure, what's up sis?"

Now, let me tell you she had changed clothes, and was wearing tight shorts and a low-cut top, and obviosly wearing now bra. I had to pull up my covers so she wouldn't she my raging boner.
"Well, I'm really down on myself, because no guys ever ask me out. I think it's because I'm really ugly and fat."
"Mel, what are you talking about? You're not fat nor ugly! You're a very pretty girl!"

"You're just saying that bacause you're my brother."
"No seriously! You're fucking hot!"

Then I realized what I had just said. I had called my sister hot, right to her face. Not only that, but my covers had fallen down and she could see my hard-on. She got wide-eyed, and ran out of the room. I cursed under my breath, and calmed myself down. I waited about an hour then went into her room to appoligize. When I got in there, I saw her masturbating, one finger in her beautiful (and shaved) pussy, and one in her asshole. I instantally got hard.

SHe noticed me, but didn't do anything. She kept playing with herself and then I started to. Before long, I was on the bed next to her. We started talking about how we both have lusted about each other for years. Then out of nowhere she started sucking my dick. It was the greatest senation I ever felt. I looked down and noticed that she had completely engolfed my cock, and that set my off and I came right down her throat. We sat there awhile, then out of the blue she said, "Den, I want you to fuck me"
"WHAT?"
"Do it. No foreplay, just fuck me."

I felt guilty doing it because she was my sister, but something in me snapped and before I knew it, I was jamming my cock into her pussy, doggy style. I started off slow, but the wiggle of her huge beautiful ass had me hypnotized. I started going faster and faster and harder, then I yelled to her I was about to cum. She yelled
"NO NOT JUST YET!!!! I WANT YOU TO FUCK ME IN THE ASS!!!!"
I was happy to obligie. It took a few trys, but finally I managed to get my 7 incher into her ass. It was the greatest sensation I had ever felt! We fucked for another hour and I told her I was gonna cum. I was about to pull out, when she yelled for me to cum in her ass! I came harder than I ever had before! Out came 12 huge pumps of cum. A pulled out when I was done, and we laid there for awhile panting and out of breath. She gave me a kiss, and I walked back to my room. We fucked a lot over the next few days until everyone came back. After that, we never had sex again. I was disapointed, but I would never forget those 5 days of heaven.

THE END

Let me know if you guys like this, and I might write some more.