Her history teacher looked like he was well hung. Sometimes he didn't wear underwear, and sometimes Penny could see his cock swelling in his pants when he looked at her or another pretty girl. The tube of cock flesh seemed to stretch down his thighs… Penny whimpered and ground her hips harder on the bed.

Then she started thinking about her daddy's cock.

Penny blushed shamefully as she thought of her father, but she got much hornier at the same time. She knew her daddy had a simply enormous prick. She'd never seen his cock naked, but she'd seen the shape of his cock through his pants, and his prick was obviously very long and fat. Penny's pussy burned as she thought of taking her daddy's cock out of his pants and rubbing his prick, making his cock grow stiff and hot in her little hand.

"Oh, Daddy," Penny whispered. "I want you, Daddy. I want to suck your dick…"

Uncontrollably horny now, the teenage blonde grabbed the pillow and thrust it between her legs. Then she started dry humping it hard and fast, panting and groaning as the heat built steadily in her hairy virgin cunt.

"Well, well, well," a soft voice said behind her. "Is this your idea of doing your homework, Penny?"

Penny gasped and rolled over. Standing before the bed was Mike, her tall, handsome older brother. His mouth was stretched in a knowing grin. That was a typical expression for him, Penny knew. Mike was a cruel, arrogant boy, and he always seemed to be leering wickedly at some girl.

"What are you doing here?" Penny murmured, blushing fiercely. "I thought you were with Kenny."

"Well, I'm not, am I?" Grinning, Mike sat on the edge of the bed and looked at his sister teasingly. "Of course, you obviously thought I was with him. Or I wouldn't have just caught you rubbing off your pussy."

Penny started to deny the charge, but she stopped when she realized how obvious it would be to both of them that she was lying. All she could do was blush and lower her head in embarrassment. Then she felt Mike's hand sliding up her leg, caressing her slender, shapely thigh through her tight faded jeans.