Where it happened: home
My step sister had married, and she and her husband lived at home with the rest of the family. No one spoke of it, but her husband had been stepping out on her since before they were married. He married her because she was expecting a baby. Well, anyway, my step sister knew that her husband was fooling around. And I suspect that she wanted to get even, or at least, have a little fun of her own. So on this particular morning, I was taking a shower. My step sister had called her sister to come over and keep her baby for a few hours. I noticed when I got out of the shower that just the two of us were there, which was very unusual. And she was more friendly toward me, which also was unusual. I thought that she was coming on to me, but I thought that I was just imagining things. She was very pretty, and I had been attracted to her for some time. So when she asked me to come to her bedroom, I went. She was still wearing her nightgown, even though it was almost time for lunch. I can still see her slim, firm legs showing from under that lacy green gown and her small round breasts outlined from above. Since I had just gotten out of the shower, I had managed only to put on my jeans before making my trip to her room. She pushed me gently to force me to sit on the foot of her bed. Then knelt down between my legs and unzipped my pants. Off came my pants. I couldn’t believe what was happening. I was so very nervous. Almost trembling. I was a virgin. She didn’t know it. But I was. Before I knew what was happening she had my dick in her mouth. It was the most wonderful feeling that I had ever experienced. Her hands danced gracefully over my balls with ever suck. I almost came in her mouth before she stopped. I moved back a little and lay back on the bed as she moved up beside me. We started kissing. She grabbed my dick and started stroking it. I was getting really hard, and I wanted her. So, as I kissed her, I made my way down to her breasts. I slid her gown up and over her head. It was gone. She wasn’t wearing any panties, so we were both nude. I hesitated, and she probably sensed that I didn’t know what I was doing. She told me to lay on top of her, and I did. As I spread her legs, she gently guided my dick to her opening. My dick slid into her with ease. She was so warm, wet, and just tight enough to make me almost cum right then and there. I can not explain how I felt as I lay on top of her feeling her tits under my chest. I was so horny as she took those deep breaths under me. I lost my self right there. I could feel her every movement under me as she got more and more excited. I almost came as I felt her leg muscles tighten against mine. I had to stop pumping and rest. I was in heaven laying there with my dick up in her. After a few seconds, I continued. She arched her back and came. I felt her pussy squeze my dick several times. She writhered underneath me and let out alittle whimper. Thought was all it took for me to shoot my load. I emptied every once of cum that I had into her pussy. It was then that I remembered that I had not used a condom. I didn’t know it at the time, but she was on the pill, and I didn’t have anything to worry about. Anyway, we kissed and lay there for awhile. Before the morning was over, she jacked me off twice and we had sex once more. She also taught me how to masterbate a woman the right way. Sadly to say, I never saw her nude again after that day. What ever she had set out to accomplish that day was done. And she never did it again, at least, not with me.