I am Billy and I am 19. My sister is Ellie and she is 18. We both still live at home with mom and dad. Ellie is beautiful and looks just like my mom. Both of them are about 5ft 05 inches tall, weight about 125lbs, and have light brown hair with blue eyes. My dad is a lucky man to have such a beautiful woman as my mother for his wife. And Ellie certainly has the eye of every guy that sees her, to and including me. I can't tell you how many times that she has caused me to have a big ole boner. Her body is exquisite with beautifully shaped legs, a great butt with butt cheeks that stick out so perfect and are so round. And then, there are those beautiful tits!!! Her bra size is 37c. I know because she told me and I have seen her bra.
Ellie and I are really close. We have always got along very well. Both of us were quite popular in school. She had been on the Honor Roll, a cheerleader, played volleyball, and on the swim team. She sure did make the volleyball uniform look good and the swim suit even better. As for me, I had been an athlete, playing football, and baseball. Our parents were well educated and provided for us very well. We lived in a beautiful home with an in ground pool. More than once, Ellie and I have skinny dipped in it. On more than one occasion our parents caught us skinny dipping and usually just shook their head and laughed it off.
Mom and dad obviously loved each other immensely. They were always very touchy feely with each other. And then their sounds of passion in bed on certain nights only confirmed their mad desires for each other. They had to know how loud they were, but I guess that they didn't care when in the throws of passion. Ellie and I talked about our parents sex sounds quite often and both even confessed to masturbating while listening to them. Of course, each of us in our own room. It was absolutely arousing. We often would imitate our parents in a flirtatious manner kidding around with each other.
It was summer time. It was also a Friday night around 9:30 PM and our parents were at it in the bedroom. The sounds got to be to much for me so I threw on my swim trunks and headed out for a swim. I was only out there maybe 10 minutes before Ellie came out to join me wearing a really sexy bikini. I looked at her and asked her if our parents sex sounds got to be to much for her too, and she said oh hell yes. Since this was a Friday night, and we knew that they hadn't had sex all week, that we were in for a sexual marathon between the two of them. One that would probably go on until midnight or later.
Ellie jumped in the pool and swam up to my side. We started talking and I told her that I had to get out of the house before my hard on got any bigger and burst. She laughed at that and said about the same for her. She didn't have the hard on but had soaked her panties getting so aroused listening to them. I then said to bad we are brother and sister, or we could help each other out with our state of arousal. Ellie then surprised me by saying, I won't tell if you don't. I looked her in her eyes and said don't joke about, that, because I certainly would if she would. She looked me dead in the eyes and said I'm not joking and rubbed up against me. She told me then that she had masturbated many a night fantasizing about sex with me. I was thrilled to hear her say that and told her that I had fantasized about her and jerked off as well.
