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I know this sounds like one of the fictional stories posted on this site but this one is true. It has a sad ending for both her and me. Back in 1968 I was sixteen my sister was fourteen. We were never close until that dreadful summer. Mom used to work part time but this summer she thought we were old enough to stay home alone so she could work full time at a factory. Liz and I hung around together all summer since there weren’t a lot of other kids our age. In mid July during a long heat wave I started going in our parent’s room after they left for work because they had an air conditioner and I would sleep late. Then Liz was complaining to mom about it so mom told me she could sleep in there too. Sleeping next to your sister wasn’t so cool. But it worked out just fine.

I would wake up and find her asleep with me in our parent’s bed. A few times I woke up late morning to find the room rather cool with a light blanket pulled up over both of us. Then one morning when I awoke I was cuddled up alongside her for warmth. But I had a small problem, my dick was hard and pressing up against the crack in her ass. First time it happened I rolled away quickly, but the next time I was kind of turned on by it and just laid still until she woke. I knew she could feel it but said nothing. Then it was a regular thing to nestle up to her. I got brave once and started pushing my body into hers. I thought for sure she was asleep. It didn’t take too long before I was cumming in my underpants. Later that day she made reference to what I had done, not complaining nor was she threatening just so I would know she knew.

I don’t know if she was turned on by it or curious but she let me do it almost every morning before I got up and took a shower. Sometimes she would pretend to be asleep but I could feel her wiggling her ass back at me. I never tried anything else. It was a real thrill to me and I’m guessing her too. Then it took a dangerous turn, I woke up cuddled up to her as usual my dick pressed firmly in her butt crack I took a chance and pulled my underpants down over my hips and continued on. I was in for shock of my life, her nightgown was up over her waist. It was bare skin against bare skin. I didn’t move at all, then I felt her move her ass a little. Well I took the hint and started rubbing it into her. Within minutes I spilled it all over her ass. Embarrassed I went for the shower. She never once said anything about it. Then it was happening once a week. Never, never did I ever try to do anything more than get my rocks off.

I thought it was all over one morning. I had just started when she rolled over on her back with her eyes still closed pretending to be asleep. Instinctively I crawled on top of her. I didn’t try to kiss her neither did I try to fuck her. I just ground against her with my dick until I splattered my cum out on her panties and belly. I went for the shower and when I retuned she was cleaned up and again said nothing about it. By the time it was to go back to school it was happening several times week. Sometimes while we spooned and I would cum all over her ass checks, other times I would lie on top of her and blow a load on her. Sometimes she would have panties on other times she wouldn’t.

She never spread her legs if I was on top and she never brought her legs up if I was behind her. She made it impossible to fuck her. I never even thought about forcing her to open up for me. I was quite content to get away with what I was doing. Well I never knew when it happened because there were so many times. Maybe one of the times when I shot extra hard forcing some cum between her ass cheeks and closed legs, maybe she rolled over after and it leaked down onto her pussy. Sometimes when I was on top I would cum and her panties would be soaked, sometimes when there were no panties I would see my seed on her bush. Maybe that dripped downward and got her.

Anyhow by Halloween she knew she was knocked up. She told mom and the shit hit the fan. But she refused to tell her how she got pregnant. Off to the doctor they went, two months pregnant she was told. Mid November she started to bleed slightly before mom rushed her to the doctor. Bad news, she had lost the baby. I was so relieved but at the same time I was pretty upset over it. It was my baby she was carrying. Our bodies never came close to each again, and that part I missed.