"I wish you wouldn't do that," Mary Jo said, squirming. "I mean, like, you're Mom's boyfriend, not mine." She giggled. "And you really shouldn't be putting your hand on my leg that way."

"I thought we were friends." Zack Perry said smoothly, sliding a little closer to her. His hand was high up the girl's thigh, and his fingers flexed on the velvet-smooth flesh.

"I really don't think you even oughta be here," Mary Jo added, easing toward the end of the sofa. "I thought you knew this was Mom's exam night at school, and she won't be out of class till nine or ten o'clock. Oh, you better stop touching me there! I'll just have to tell Mom what you're doing, if you don't stop!"

"Would you really do that, Mary Jo?" Zack whispered, moving his hand up under the hem of her skirt.

The redhead gasped as his fingers touched the lace-edged panties.

"You don't have to play innocent," Zack went on, his chest brushing against her trembling arm. "I know you listen to us at night sometimes, when your mom and I are fucking. Does it excite you to hear the sounds we make? Does it make your pussy get all wet and hot and tingly?"

Mary Jo's green eyes enlarged. "How did you know I listened?"

"I didn't, until you told me, just now, but I guessed."

His hand moved again, under her short skirt, and she almost jumped straight into the air when his fingers brushed across her pantied crotch. She could feel the crackle of static electricity in her pussy hairs! His hand cupped her pussy bulge, and he squeezed her trembling cunt.

"Teenage girls always like to listen to their mothers getting fucked," Zack purred into her ear.

Mary Jo closed her eyes and moaned as his fingers pressed against her delicate teenaged cunt, separated from her flesh only by the wispy-thin shield of her panties. She squirmed, and her crotch seemed to lift of its own accord, right into his gripping hand.