I'm 10 years older than my sister, and I always loved her and spoiled her. When my parents divorced, Mom got us, but it wasn't long before I was old enough to go off to college. I missed my sister, and wrote a lot. Eventually, Mom wrote that she was getting re-married and having a kid around from a previous marriage "might be an obstacle to a new relationship" so she asked me to take my sister off her hands. Real piece of work, my mom.

So I picked up Tammi after a three-day drive and she was crying as soon as we were out of the driveway. She spent a couple of hours quietly curled up using my thigh as a pillow while I drove. It was very pleasant.

When she recovered, she kept lying like that and we chatted. She kept stirring the conversation to my girlfriends I'd had since I went to college. Tammi finally admitted that she had had a boyfriend. I thought that sounded cute, and I asked if they had kissed. She told me that they had "done everything". Then she cheerfully went into a description of "everything". It turned out that Tammi's "boyfriend" was in his thirties and the two of them had a two-month relationship. And they had done "everything" - she had a CD with a video of the two of them fucking, and when we pulled over at a rest stop she showed it to me. My little sister Tammi was a hardcore slut who enjoyed climbing on and riding a cock and even taking it up the ass and would swallow cum. She was cheerful and even proud of herself, and I couldn't help getting turned on.

When we resumed driving Tammi resumed snuggling, only now she was fondling my dick through my pants. She got all giggly and began telling me how nice it was and how it would feel so good inside her and how her pussy was getting wet. Finally, my resistance broke and at the next rest stop, when we were stretching our legs, I took Tammi's hand and took her into some nearby woods and I told her I was going to fuck her. She said she wanted it doggy style, so I took her doggy style. We spent the rest of that day as we drove with her nursing on my dick and playing with my balls. When we stopped for the night at a hotel, we fucked like honeymooners.

The three-day drive took four as we kept on stopping to fuck. She wore shorts the first day but skirts the rest of the trip without panties. She was wild and would do anything. She even sucked off a kid her own age at a restaurant so I could watch and I screwed the kid's mom while Tammi watched and played with herself.

Tammi has been with me over a year now and we're a serious couple. We did some sexual adventuring the first few months, threesomes and more-somes and various games. She fucked a dog three times, and she developed a taste for being spanked, but after the fifth month or so we became monogamous. Now we're living together and while we're brother and sister, we're a couple to each other.