I love this site.
I admit I am ashamed to tell this story in a way, because there is so much taboo placed around this subject. When my sister and I were younger, we used to play games like 'Show me yours and I'll show you mine.' Then we would lower our pants and show each other our private parts. We did this quite often. When I was older I started getting hard when we did this.
As young teens we both knew why mine got hard and her's got wet. As teenagers our little game turned into her fully jacking me off as I fingered her pussy, and her finishing herself off as I watched. She developed into a beautiful woman with wonderful breasts and a pussy most men would die to see and have. My dick matured into a nice thick seven-inch instrument. By late teens we were both dating a lot. I would come home from my dates and sometimes lay in bed and masturbate if it was a night when I didn't get anything. She would come home from her date and join me in bed. We would masturbate each other or ourselves until we came, then she would go to her own bedroom.
As the years passed we regularly masturbated each other, ourselves, after we got home from our dates with others.
Fast forward. Now I am 38 and my sister is 35. She is married and so am I. My sister and I have such a special bond. Whenever I am especially horny or she is especially horny, we call each other and arrange an afternoon date. I go to her place or she comes to mine and we do whatever we want to do to relieve our horniness. Even though she is my sister, I love it when I relax and she beats me off, I like to use her vibes on her and help her cum. Neither of us have any guilt over this but we obviously dread the idea of our spouses ever finding out about what we've done for many years. I can tell this story here in an anonymous format, but I have never mentioned a word of this to any male friend and I never will. I feel truly lucky to have a sister like this.