I grew up in a very rural area. My parents liked the idea of living on a farm, but were not farmers, so My sister and I were alone at home once the school bus dropped us off until my parents came home from work. We were so far away from anyone, that we rarely had friends over. When I was 14, and my sister 13, we were both curious about the usual things kids that are. It started with the let me see yours and I'll let you see mine stuff. This gradually became mutual masturbation sessions, and eventually sex.
We were careful, I would buy condoms for vaginal sex, and if I did not have a condom, it was strictly oral and anal. This went on for a couple of years, then we moved to a suburban house, we both met other teens, and went our separate ways, never talking about or mentioning our little trysts.
We both got older, I went off to college and we drifted apart. I moved to a large city in the northeast, and my sister got married, had a kid, and lived in Florida. I did not get married, had various girlfriends at times, but essentially lived alone.
I was aware at some point that my sister's low life husband had lost his job, and they had lost their house and lived in a trailer park outside of Miami. I also knew they were fighting pretty much constantly. I got a call from my mother, who was living alone for my dad had died a few years before, that my sister's husband had left her to parts unknown. She asked if it was possible I go down to Florida and see what I could do to help. I flew to Miami, rented a car and drove to her trailer. She was really desperate, living on whatever she could come up with, with not enough skills to get a job that would pay for daycare for her 2 year old. I stayed for a few days, came up with nothing I could think of to truly help her out of the situation. I told her she should move up to where I lived, as I had an empty bedroom. She could stay there, and without the pressure of money for food, rent, etc., she could even get a loan to go to school part time to get a decent job.
So, she moved up to my place, and things went relatively smoothly, with hiccups of course, as I was not used to having a two year old around, but I did kind of enjoy it to tell the truth. My sister enrolled in a local junior college for basically an undeclared major to decide what she should do. She was taking a light load, getting used to school again, which was the wise thing to do.
One evening, I came home after a particularly hard day at work and was annoyed that the sink was full of dishes, and gave her a bit of a hard time about doing her share around the house. It was kind of silent at dinner that night, and I retired to my bedroom right after dinner. I was watching TV, heard my sister putting the baby to bed. She slept in the same room as the kid and I figured she had gone to sleep also.
I turned off the TV, put on the headphones for my laptop and was checking out some porn. I had had no women over since my sister had moved in, and was very horny. I was sitting in bed, in the dark looking at my laptop, cock out, stroking away. I had not seen my sister come in until she was right by me. I jerked the head phones off, and covered myself with the sheet. I knew she had gotten a good look at exactly what I had been up to, and I was a bit embarrassed. I mumbled some nonsense, and she put her finger to her lips to say quiet, pointing to the baby's room. She was wearing a tshirt and panties, as she generally wore when she slept. She pulled her tshirt off, exposing her incredible boobs. My sister is tall, 6 foot even, slender but not skinny, long dark hair, kind of a hippy child look. I was sitting there staring at her perfect tits hanging there as she reached under the sheets and grabbed my cock. She began to lick my cock and balls, and then slipped her lips over it and slowly went down, rolling her tongue around it as she did. She had certainly gotten good at it since when we were kids. She was between my spread legs, sucking me, when she looked up and raised up a bit to rub her large hanging tits on my cock, squeezing it between her tits. She said I just wanted to thank you for being so nice to her and the baby. She stood up and removed her panties. She was old school hairy pussy, and as soon as I saw it, I wanted it. I motioned for her to straddle my face, she got in the 69 position and I licked her pussy, which was very wet. She sucked my cock as I licked her, slid my finger in her, and felt her nice ass. I had not had sex in a while, and I did not want to blow my load in her mouth, I want to fuck that wet hairy pussy. I whispered to her as to my intentions, she got off and turned around. She straddled me, facing me, reached between her legs and guided my cock inside her. She slowly went up and down, gyrating as I rubbed her tits. She leaned over and we kissed, tongues playing with each other, She whispered in my ear, did you miss my c**t as much as I miss your big dick? Yes! I said, your c**t is the best I ever had. She moaned and I knew she came, she always liked talking nasty when we fucked.
I turned her over and got behind her doggy style. I looked in the mirror by my bed and saw her big hanging tits swing with each thrust of my dick. I knew, for the first time ever I was going to do something I never did with her when we were kids. I shot a huge load of cum in her pussy, with her moaning from another orgasm.
My god, it was exciting when we were kids, but now, my sister had become the best fuck I have ever had. She lay in bed with me and she told me that her husband and her had not had sex in over a year. This was her first time since then, and it was way better than anytime with him. I asked why and she said he would not eat her pussy, and only liked to come between her boobs. And, she smiled sheepishly, you have a much better cock.
Since that night, she and I agreed it was best that the neighbors and my friends not know she was my sister. We do not look very much alike, as I have red hair and she is a brunette. So they think she is just my hot girlfriend. She is 27 now, very close to graduating school, has a part time job, but she still intends to stay here, no matter what happens. We argue at times, but, always finish with hot makeup sex, so I think sometimes the arguments are contrived.