It was the summer of 1969 and my parents, my two sisters, Jessica (20), Casey (19) and I were spending the summer down by the lake. It was the last fling of the Summer as we would all be heading back to college in the fall.
I had just celebrated my 18th birthday, but growing up, I had always been a sex crazed, horny little dude. I used to spy on my sisters every chance I got (unsuccessfully I might add). I tried walking in unannounced into their bedrooms or the bathroom but never got lucky enough to catch them in the act of undressing, let alone naked.
That all changed about half way through our summer vacation. We had just finished eating dinner and it was my turn to do the dishes. My parents went into the family room to watch TV, my sister Casey was on the phone as usual, and Jessie had gone in to take a bath. The cabin was setup in a "U" shape that wrapped around a small courtyard facing the lake, with the kitchen window facing out into the courtyard.
The sun was setting and it was getting dark. As I stood there doing the dishes, I saw the bathroom light come on. I noticed that the curtains weren't drawn all the way and I could see shadows and movement through the window. Stopping what I was doing, I went into the other room to check on my parents and sister. Casey was on the phone as usual, Dad was already asleep in his recliner in front of the TV, and Mom was reading a magazine on the couch and looked like she was about to fall asleep too.
Walking out the back door, I tiptoed to the bathroom window in the dark. I was worried about getting caught but couldn't let this opportunity go by. I looked around one more time to make sure I was alone and peered in through the bathroom window. Jessie had taken her shirt off and was in the process of taking her shorts and panties off. I watched in awe as she pulled her shorts over her hips and bending over slid them off her legs. I got a great view of her butt and pussy as her back was facing the window. Jessie had always been an athlete, running track, playing softball and it showed... she was absolutely breathtaking. She had an athletes body that was long and lean with well rounded muscles...She didn't have an ounce of fat on her and as she turned to face the mirror, I saw that she had flawless medium sized boobs that stood straight out, with pale smooth skin and tiny pink nipples that rode high on her breasts.
As I watched, she admired herself, turning left and right as she studied her reflection. She pinched and pulled on her nipples and softly rubbed her breasts, and I could see by the look on her face that she was getting turned on. She started to rub her belly and move her hand down to her pussy, when there was a knock at the bathroom door and I thought Damn...so close and now she was going to be interrupted.