Momma Knew

This is my first try so be kind. Hope you enjoy.

My story begins when I was a teenager, like all boys my age my cock stayed hard most of the time. Sometime in the morning when my mother was making breakfast I would sit at the table and watch her ass move around in her robe. Looking back now I wonder if she didn't know more than I thought. Because every once in a while she would turn and the robe would separate and I would get a flash of white cotton underpants. Well that was all it took for me in those days, I was off to the bathroom to dream of what was under those panties and what it would feel like.

Another highlight of my life at that time was my sister. She was a year younger than I and devoted to her big brother. She was always unknowingly giving me peeks of her panties though her opening in her shorts, and once in a while I would see her in a dress and wow you get the picture.

The event of this story took place one afternoon when my mother announced we would be going to the local swimming lake for the day. That was always fun but today would be great. I put on my swimming trunks and walk out to the car to find that the back seat was filled with tubes and picknic baskets and other stuff. Mom told my sister she would have to sit on my lap. She assured her that her brother wouldn't mind. My sister was only wearing a yellow one piece swimsuit. Mom had gotten her one of those suits that looked like it was made out of terry cloth. I always loved that suit because when it got wet you could almost see thought it. This time however Mom had bought a suit what was a little too big at the top. So when she sat on my lap I had a nice view of her nipples. Then something happened as she sat on my lap. I became aware that my cock was position right between her ass cheeks. Every time she moved it was like a personal lap dance. Needless to say it didn't take long that I was turned on.

As we drove along I could feel the pressure beginning to build. I was trying to do everything I could to keep from thinking about my cock sliding up and down in those two cheeks. I could feel the pre-cum starting to leak inside my trunks. I tried to move but that only made it worse. I kept thinking to myself if I can only hold out we are almost there. But then my sister did something to this day I did not understand. She reached up and pulled the top of her suit out as if she was hot and trying to get air. I don't know if she got air or not but he did give me a full view of her chest, and stomach and top part of her mound. That was all it took. I exploded. It seem like for ever. I thought I was never going to stop.

My sister turned to my mom and said there was something about her bottom getting wet and it was sticky. But at the time I was trying to keep from moaning. My mom just smiled and said we are at the lake and sometimes accidents happen.

I cant help but feel momma knew.