[M]y brother-in-law’s Wi[f]e

The best sexual experience of my life, so good that I really remember every detail vividly. This is the first time I’ve posted to this sub, so I hope you like it.

So a couple of weeks ago, my wife’s whole extended family was invited to go on a weekend vacation to a national park. Grandparent funded, all 40ish people going. My wife (We’ll call her Jane) and her brother (John) are the only young married ones in the family, so as such, they decided that we would split a room. We had vacationed and roomed with John and his wife (Liz) before, so this wasn’t weird or unexpected, but I’d be lying if I said this situation didn’t get me a little excited. My in-laws are all an extension of the same type of personality, loud, inappropriate, invasive, and overall just a wild time. Liz and I seem to be the only exception, both of us on the more reserved side, usually content to sit off to the side at the family get togethers. Because of this and being the first of the incomers to the generation, Liz and I actually seem to get along very well, sharing in our comfortable exclusion, laughing at the weird quirks of their family and even venting similar frustrations with the family. Not to mention that Liz is super cute. She’s the epitome of a busty petite girl. 5’3-4, dark medium length hair, big blue eyes, and perfect D’s on a minimally curvy body. I’m 6’3 and on the slim/swimmer’s type body, also with dark hair and brown/green eyes. We are both pretty reserved and responsible now, but from talking with her, I know she did have quite the wild streak when she was younger, and it tended to show in discussions and games, though never in action. That small hint of a darker side always made me intrigued by her, so I was totally looking forward to a weekend of spending a lot of time near her, and hoped to maybe even catch a small glimpse of her body while changing.