I was in 5th grade when my kid sister Penny, 3 years younger than me, tore her hymen in ballet class. I had just discovered masturbation, and when I figured out what a hymen was, I became sexually intrigued. Penny's pussy became the focus of my jerk-off fantasies. But I figured it would remain fantasy.

Then one saturday Mom and Dad were out and Penny and me were alone. Or I was alone, because she was in her room. I didn't hear anything so I looked in her room and there she was straddling a pillow and humping like a little slut. She was terrified that I'd caught her, but it took no work to get her to substitute me for the pillow. Her body on mine, with nothing but our undies separating my cock and her wet pussy, grinding against each other, was my first real sexual experience. Her face when she came was gorgeous.

When we cleaned up afterwards, she played with my dick a bit, making me hard. I'd read about pussy-eating, so I asked her for permission to lick her juices off her. She was all "that's yucky" at first, but she was curious. So I got to eat Penny's delicious pussy and made her cum again. At this point my cock was aching so while she was still cumming I mounted her and slid my dick into her. I think I almost passed out when I came inside her. She was still cumming and I started kissing her. She kissed back and we spent a while making out. My cock got hard again inside her and we had another round, this time her on top. After we had lunch I showed her my porn collection and we tried 69, and that got us both hot again. I didn't bother asking when I flipped her over and eased my dick into her asshole the first time. Her gasping and crying made me hurt as I fucked and came inside her ass.

We got cleaned up before Mom and Dad got home, but we were very cuddly, and she snuck in my room that night for more. A pretty much stopped jerking off, and Penny became my go-to-girl for sex. She tried Playing Doctor with boys her own age, but that fell flat quickly. She had a couple of girlfriends she managed to seduce though. But I never got anywhere with girls my own age. By the time Penny got to junior high, we had given up on other people and we were a couple.

Penny and Luke and I moved out as soon as we could. We moved south to the States and claimed to be a married couple. We've had 3 kids, and we pretend our kids haven't done anything with each other.