My sisters-in-law, Cindy and Sandy, and I had always had an odd relationship, and my relationship with each was unique in its own way.
Cindy was the youngest of the three sisters, and she was by far the most flirtatious. Young, bright-eyed, petite, and full of energy, she would always play fight with me. I knew it was because she did not have a brother growing up, but there were times, after I would get done pinning her to the couch or floor, that I would have to sit awkwardly for a while or go to the bathroom to let the erection I would grow go down.
Sandy was the most timid of the three. As a middle child, she was the eternal introvert, quiet and shy. Whilst Cindy was the more outgoing and sexy of the two, Sandy was more beautiful, when she tried.
Every week, my wife Sara and I would have her sisters over for dinner. They were attending the university, and my wife and I had found jobs in the city after graduating. It was a bit of a pain having them over so often, but we got along fairly well, and so I did not complain too much.
Besides, on good nights, I would find ways to entertain myself. Cindy worked as a waitress at one of the local restaurants, and as such, she often had a sore back from carrying around heavy trays all day. I could definitely see why; at 5'3 and only a shade over one hundred pounds, those platters she carried were almost as heavy as she was!
My wife had made the comment one time that I gave the best massages. Cindy asked for one, and it became almost a weekly ritual. Cindy would sit on the floor in front of my recliner, and I would rub down her shoulders and back. As I did, I would slowly work the back of her shirt up. Though she was petite, Cindy had a perfectly round bubble butt, and when she sat in that position, the top quarter of her crack was visible from my vantage point.
As I rubbed her shoulders, my dick would get rock-hard, thinking about what it would be like to rub my hands all over her ass, lick the crack, maybe even rub my cock on it.
It seemed like a pipe dream; something to jack off to later on, or to visualize later that night when I was getting a blow job from Sara. Though I had my suspicions about why Cindy ALWAYS wanted a massage, nothing could ever come of it.
One night, however, something happened that changed everything.
We had finished dinner, and a scary movie came on the tube. We turned the lights out and decided to watch it. Sandy left, as she had no interest in scary movies (Sandy is a bit of a wimp). I was lying at one end of the couch, and Cindy was lying at the other. Sara had settled into my recliner, engrossed in the slasher flick.
It was mid-October, and an early chill had blown into town that night. I had a blanket that I threw over my legs to keep warm. Cindy stuck her legs under it, and we began tugging the blanket back and forth. She had worn shorts that night, and the feel of her bare legs running against mine was enough to perk my cock up right nice.