I was 28 when I got married, and my wife was 33.My sister-in-law was 38. We had been married for about two years, but I had noticed a long time before, that every time I was around my wife's' oldest sister she always made it a point to bump into to me or kinda rub up against me. My sisters-in-law as my wife were very attractive women. My sister-in-law was just a bit taller and a little more endowed, I always thought about a 36D.
Well trying to be polite I didn't make of it. But that all changed one Saturday afternoon. I had to work that morning but my wife told me to go to her sister's house after work, we were grilling out and going to swim.
It just so happened that when I got to her house, I rang the bell and she met me at the door. She was wearing a hot 1-piece swimsuit that fit her very well; I told her that she looked great. She said "thanks" and kissed me on the cheek. She then told me that everyone else was in the back by the pool, and that I could change upstairs.
I went upstairs and started to change when she opened the door on me just as I was completely naked. She smiled and told me that I had a nice package! She quickly shut and locked the door and made her way to me, pulling the top part of her swimsuit down as she got to me. I had admired her figure for quite awhile and had always wondered what she really looked like. I was not disappointed. As she reached me, she began kissing me and took my quickly growing cock into her hand. As we broke from our kiss she commented that she had wanted to see me like this for a long time.