He saw me, she thought. He saw my panties. When Billy came to the car, carrying the two paper cups of soft drinks, Misty reached across and opened the door for him, her skirt sliding high on her slender thighs, above the tops of her nylons, exposing her white flesh. She left it there as her son sat beside her, handing her the cup, his eyes feverish as he stared at her legs.

"Mmmmm, nice," she purred as she sipped the icy drink. "God, but it's so hot today, isn't it, baby?"

Billy nodded, unable to trust his voice.

He had, of course, seen his mother in tight shorts often, but this was different. Very different. He was excited, and trying hard to keep his cock soft. He finally pulled his eyes from her legs and looked at the group of teenagers. One pretty girl was standing, a slim leg bent as she rested her foot on the bench. The creamy cheek of her tight ass showed, and that was where he stared.

And his cock swelled inside his red shorts. "Pretty, isn't she?" Misty said. "Do you know her?"

Billy shook his head, trying to keep from looking at his mother's legs, hoping she wouldn't notice that his cock was hard.

But Misty did notice.

There was no way she could help but notice. It stuck up, a spot of wetness forming where the head was. She trembled, almost spilling her drink as she turned away.

"Here, hold this for me," she said, handing him her cup.

She started the car and pulled from the drive-in smoothly. Once on the street, she took her cup from him, sipping as she drove. She knew her son was trying to look at her legs and keep her from noticing. She pushed her left knee outward against the door, spreading the hem of her high skirt. The creamy flesh just above her nylons showed.

Misty could hardly believe she was doing this. Not exposing her legs this way, but to her own son. The desire to expose herself had been there for some time, but not to her son. Yet, she could not deny the certain lewd thrill she was getting by it. Billy would look – all boys would look, but she didn't think he would try anything with her, like feeling her or anything.