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.