I had an affair with my step-sister when we were borth eighteen. It started out sort of playing around. We were left alone quite often. One time we happened to be alone in the house--I had some pot so we smoked that and both got a little stoned and we ended up snuggling on the counch watching television. I had this great urge to kiss her so I did. To my delight she liked it. After that we would make out every chance we got, even with our parents in the other room. I'd get so hot doing this, it was all I could do not to mess in my pants! She would let me feel her up and lie on top of her but that was all. Finally after a few months of this, she let me go all the way with her. The first time was sort of clumsy but still my best memory. After that, we had sex like rabbits. I must have spent a fortune on condoms. We would get homoe from school, drop our books and do it. At that age, I was horny all the time. My friends were always talking about sex and I was getting it all the time. I never told anyone about it either.