Chapter 1

I and my sister, Casey, have been fucking for the past six months or so. Of course, we have done this carefully so that Mom and Dad won't find out.

I'm Mike, and at the time we started fucking I was two months before turning 15. Casey was, at the time, 13 years old. Let me tell you how we got started.

It was Friday night, and I dated the hottest girl in my age group, Anna. After having a hamburger with fries and seeing a movie - it turned out that Anna - as hot as she was - practiced a very old fashioned system of birth control - keeping her knees tight together. So, by 11 pm I arrived home with a bad case of blue balls.

Arriving home I found that my parents 'went to sleep' early - but the sounds coming from their bedroom told me what kind of 'sleep' that was. That also added at least an inch and a lot of starch to my already hard cock.

Passing Casey's room on the way to mine I heard some sounds that were very similar to what I heard from my parents' room. This made me very curious, so I knocked on her door. The noises stopped and I heard: "Come in, Mike."

"How'd you know it's me?"

"Come on, didn't you hear that the folks are busy? So who else could it be? How was your date? You are back early."

"The date ended lousy. Anna is a tease."

"I could have told you that had you asked. She looks like a little miss hot-pants but her pants are filled with ice."

"I never knew I had to consult my baby sister about my dates. I'll know next time though. Anyway, I heard some interesting sounds from this room a few minutes ago. What have I interrupted?"

Casey pulled the remote control from behind her and re-started the video she had been watching. What I saw on the screen just added to tonight's frustration. A gorgeous girl, about 13 or 14 and a nice boy of about the same age were fucking in the center of a circle, which consisted of a group of nude people, adults and teen-agers who were watching, masturbating or groping each other.

"God, sis, where did you get this? This is not just porn - it's illegal porn too!"

"I'm surprised you haven't found them earlier, big brother. This is from Dad's stash, and his stash is full of these kind of tapes. Every time they fuck - I take a video."

"Oh, shit. First the lousy date, then hearing Mom and Dad and now watching this. I think my cock is going to fall off tonight."

We watched the movie together, and after a few minutes I noticed Casey's hand crawling under her nightie and start moving back and forth.

"D'you mind if I join you?" I asked, and without waiting for a reply I unzipped my Jeans and pulled my cock out. I had a nice enough cock - I was not yet 15 and it was 6" long and quite fat. I immediately started stroking slowly.

"Need some help?" She surprised me.

She hadn't waited for a reply either. Her small hand wrapped around my cock and started stroking.

"How about you?" I offered.

"Let's get you off and then you can take care of me."

All of this was taking place in a casual manner as if we were doing each other regularly, but, believe me, this was our first time.

After a few minutes of her stroking me and me groaning and grunting my pleasure - she suddenly leaned over and started sucking my cock. She bobbed her head up and down a few times, took a deep breath and then plunged all the way down, taking in my whole cock to the hilt.

"Keep... this up... and you'll... have a... big drink." I warned.

"Mmmm."

"Ohhh shit... I'm Cumminnngggg." I started spurting into her mouth, and watched her swallow all of my cum. And after this horny night - there was a lot of it.

After I finished panting and got back to normal breathing, I had to ask.

"This was the work of an expert. When did you learn it?"

"Since my 12th birthday."

"Are you still a virgin, sis?"

"Let's kill the questioning. No - I'm not a virgin, I've been regularly fucking since I was 12. No - I won't tell you with whom, it's none of your business. Yes - I'm on the pill. I know someone with access and he got me the pill. Any more questions?"

My 13 year old sister had me surprised, my mouth open and my jaw dragging on the floor.

"Jeez, sis! I didn't start fucking until I was nearly 14! Can I fuck you too?"

She giggled. "Everybody wants a young girl, but who wants a young boy? You have a good reputation at school, though, both as an excellent cunt lapper and as a good fucker."

"Do girls compare notes too? I thought only boys do that."

"Just shows how much you still have to learn about girls. But back to your previous question - first eat me out and then I'll decide whether you can fuck me or not."

"It's a deal."

Casey turned off the VCR and the TV, lifted her nightie and pulled it off, lay back on the bed and spread her legs.

I looked at her in awe. My little sister was simply gorgeous!

"You are beautiful, sis. I never knew how beautiful you are!"

"Thank you. I guess you are going to learn a lot about me soon, that is, if you justify your reputation."

I leaned over to her pussy, the scent that hit my nose made me dizzy. The smell of an aroused female was wonderful and I kept inhaling again and again.

"Get to work, brother dear. I'm waiting to see where your reputation is from."

I started licking her. First the outer lips from top to bottom, then I pushed my tongue between her lips and reached her fuckhole which I started to tongue fuck. Flicking my tongue over her clit a few times started her gasping and moaning. Her juice was flowing freely down to her asshole. I started fingering her asshole, and while sucking on her clit I suddenly shoved my finger in.

She bucked, raising her pelvis in a sudden movement that almost threw me off her, and started shivering all over. I heard the start of a loud wail and clamped my free hand on her mouth. She kept bucking for a minute or two before collapsing on the bed.

"God, that was... a good one!... Your reputation... Is justified! You sure know what you are doing!"

"Is it justified enough to fuck you?"

"Oh, yeah! But let me get on top."

"Suits me. My hands will be free for your great body."

I lay down on my back and Casey straddled me. She took my cock in her hand and stroked it a few times then she aimed it at her pussy and with one slow move she impaled me all the way.