At the breakfast table the next morning Jennie was all perky and smiling, playing footsie with me under the table and sometimes giggling for no obvious reason other than she was apparently giddy over the events of the previous couple evenings. "My butt hurts a little when I sit down," she announced.

"Shhh, mom will hear you!. Geeez!" She giggled again, got up, grabbed her backpack and headed out the door to school. "See ya later alligator! Bye Mom."

"Bye sweetie," Mom shouted back from the other room, "have a nice day."

My eyes were glued to her amazing little ass as she walked away. Jennie was average height for 8 years old, but just a little skinny. Her body was irresistible to me. She looked back at me and coyly smiled as she closed to door behind her. She could sense where my eyes were going. I couldn't get enough, and apparently neither could she. We both knew that things could get real interesting.

I had to fight off my obsessive thinking about her while at school or I would get another hard on, and I didn't want to be walking around school like that. I hadn't showered yet so my dick still had residue from our activities of the previous night. I liked that. It was a reminder of our special relationship, like having her with me still.

That evening my mom didn't have to go in to work. This pretty much put a damper on any sexual activities we might have engaged in. Besides, Jennie's ass could use a rest, and we both could use the time to catch up on our sleep, and our homework. My cock would be ready for the next opportunity. This did not stop Jennie from flirting with me every chance she could. I had never seen her so happy before, humming songs and smiling, with her silly jokes and observations.

When I came home from school the next day Jennie was waiting for me. Mom had left early to run some errands on the way to work. Jennie was sitting naked in front of the PC screen looking at porn sites, only this time she was watching oral sex, not the usual anal. On the desk was a tube of KY jelly.

"Hi Jennie," I said, What you doin?"

"Come here", she said, "I've been reading about how to give a blow job and I want to practice on you. Take your pants off."

I undid my trousers and let them drop to the floor, walking over to stand beside her. We had been anticipating this moment and weren't wasting any time. My cock was already beginning to swell at the site of her nakedness. I had been thinking about her all day long at school. Jennie swiveled her chair to face my waiting penis, her eyes wide in anticipation. She wrapped her hand around it and kissed it tentatively, and pre-cum stuck to her lips. She giggled and talked to my penis, as she liked to do, "Well hello fella, you taste funny!" She them placed the head of it in her mouth. I was almost completely hard by this time. She sucked for a few seconds and stopped, asking "How's that?"

"Aw, it feels so good, but don't scrape it with your teeth," I instructed.

With that her first lesson in oral sex began as she took my cock deeper in her mouth with my prompting and guidance. On the PC screen was a porno blow job scene and she would occasionally glance over and try to mimic it, not always quite succeeding. I was rock hard and ready to explode when, after a few minutes, she withdrew her lips from my penis, looked up at me, and said, "It looks like you're ready for anal sex."

"Oh yea," I said, almost breathless, "Let's put it in there."

She took the tube of KY from the desk and liberally applied some to my hardened cock. Then she stood up, turned around and backed up to my cock, meanwhile grabbing hold of it and directing it to her waiting asshole. Jennie was so much shorter than me so I had to bend at the knees to line my cock up. I pushed against her but the position was a little awkward and her sphincter muscles a bit unyielding. Jennie stepped forward half a step, put some KY on her finger and massaged her rectum, slowly working her finger into her eager asshole. Watching my sister finger her own ass as she prepared to have me fuck her there was just about the most erotic thing I had ever seen yet.

"Ok, now lets try it," she said, grabbing my cock as she backed onto it. This time my cockhead popped right in but I was careful to be slow at first to let her adjust. "Umm yea, that's it," her eyes were closed, now focused on the sensation of my cock penetrating her colon again.

Jennie put her hands on her knees and arched her back. Since we were both standing the height difference made it a little difficult, but we managed quite well. I grabbed her hips and pulled her towards me as I began to thrust deeper into her. This helped her keep her balance as I pushed faster. From this position I was not able to drive it in as deeply as we both would have liked, but we were both so caught up in our new found passion that we continued fucking that way. All too soon I blasted a load of cum into her ass. I couldn't help it. Just the anticipation had been too much. My legs were cramping from doing it this way, so I slowly pulled back. As my semi hard cock plooped out it left a smear of cum, KY, and ass juice on her butt cheek.

Jennie stood up, turned around and looked at my vanishing hard on. "Aw, that's all? We were just getting started." She took my cock in her hand and started talking to my penis again, "What's the matter, Mister Wienie, are you getting smaller?" She bent down to kiss my cockhead.

I laughed. It was crazy to hear her talk to my cock like it were a little person. Jennie stood up and laughed with me. "I bet I could make it big again," she said with a mischievous grin.

"Ok, sure," I said, just to placate her. I plopped down on the bed, lying on my back.

She looked down at me, then at my cock, before climbing onto the bed, resting her head on my stomach facing my penis. I felt her hand grab the base of my cock, and then she kissed the head of my cock before placing it in her mouth. My cock was still partially hard and coated with the remnants of cumming in her ass, but this was no deterrent to her. She had seen this done on internet porn sites, and she wanted my hard cock in her ass again. The thought of her doing this and the feeling of her sweet little lips around my dick began to produce results; I was getting hard again. I gave her some instruction as she tried to swallow more of my cock, and she was getting better at it. I particularly liked to feel my cock against the back of her throat. A couple times this made her gag, but she went right back to honing her new found skill. Jennie was getting more aggressive as she became comfortable with this new life style she and I had discovered, confident that she could be just as sexy as any porn star.

After a few minutes of this my cock was very hard. She stopped sucking and turned towards me, smiling proudly, "looks like it's ready!" There was some ass juice around her lips, her disheveled hair sticking to it. Then she stood up on the bed and, facing me, placed her feet on either side of me alongside my hips. She then squatted down, lowering her ass towards my cock, as she grabbed it and placed it against her butt hole. Gently, she lowered her weight onto my dick. There was little resistance, her ass was loosened and ready. She lowered herself onto my cock, taking half of it right away. I could see her pussy with her legs spread like that.

Her eyes were closed and mouth hanging open, lost in the grip of erotic passion. She pulled her guiding hand off my cock and lowered her ass onto it some more, concentrating on the sensation. I pushed my cock up into her, thrusting my hips forward, but she was in control, in a position to regulate the action. I held still and allow ed her to slid her ass up and down my cock, going a bit deeper each time. Then she stopped moving with my cock deep in her ass. She was sitting on my dick. She stayed like this for a few moments, breathing heavy, and then started rubbing her clit. She was very wet there, I could plainly see that, and I knew from sex education that she might have an orgasm. I tried to fuck her but she had her full weight on me. I could only watch as she masturbated with my cock buried deep in her ass.

"Uhh, yea, I love your penis there, oh yea, uhhh," she was cumming, her ass clinching my cock. Judging by how expertly she made herself orgasm, she had masturbated before.

She then began sliding her ass up and down on my cock.

"Yea, keep doing that," I instructed her. I put my hands on her hips and guided her up and down on my shaft, showing her how to fuck my cock with her ass. "Yea, just like that, but faster. Oh you're so good!" My commands encouraged her. Twice my cock popped out of her ass as she was too vigorous in wanting to slid the entire shaft the full length in her colon, but it popped back in just as easy. It was becoming quite a workout for her, but I assisted by guiding her up and down, lifting her slight body weight.

Finally I pulled her hips all the way down onto my cock and I shot an even bigger load deep into her ass. She rested her full weight on my cock, sitting upon it as I continued to spurt more than I ever had before.

Conclusion

With a few months of experimenting with anal sex at every opportunity, Jennie and I had developed a mutual understanding as to how we could best sexually satisfy each other and make each other cum. Usually I would slide my finger up her ass, lubricated with her pussy juice, while I ate her hairless pussy. This would always make her cum, and them I would fuck her ass in just about any position imaginable. Often she would suck my dick to make sure it was nice and hard before I penetrated her, but sometimes I would be so anxious to slide my cock into her tight little ass that we would skip the preliminaries. Other times I would play with her pussy while I analyzed her, and sometimes she would masturbate herself. However we did it, I would always leave a large sperm deposit deep in her ass. We were insatiable.

I remember one time we were at a family reunion camping trip and, after we hadn't had sex for three whole days, had to sneak off to the woods by the lake. It was actually quite romantic; having passionate anal sex with her outdoors there, and it's one of our favorite memories that has bonded us.

I had a couple of girls from my high school class try to call me at home, but Jennie would be sure to answer the phone first and then hang up on then. Then she would initiate sex with me to assure I would not stray. Sure, I was 15 and should be socially dating and not screwing my little sisters ass, but she was keeping me more than sexually satisfied so that I was always coming back for more. Fact is, we both were blissfully addicted. She even suggested that we get married someday, that's how close we were. Never mind that she was my sister and only 8 years old!