Wrapping her lips around the kernel-sized bud, Marie sucked her sister's clit hard. Then she suddenly fucked two fingers into her cunt hole, burying them to the knuckles in Kelly's throbbing, juicing pussy.

"Nunhhhh!" Kelly grimaced as she felt her pussy throb convulsively around the fingers, her ass burning as she started to cream. "Oh fuck, suck it, Marie! Harder, suck harder! Nnnnggggg fuck, fuck, I'm cuuummmiiinnnggg!"

Kelly's cunt spasmed, sucking uncontrollably around Marie's fingers. Sucking on her sister's aching cunt, Marie licked off her sister faster and harder, guiding her through the peak of her orgasm. Then she took her hand and mouth away from her gushing fuck hole and rested her cheek tenderly on Kelly's thigh.

"Satisfied?" she asked softly.

Kelly just rested there and panted. Her whole body was tingling, alive with a pleasure she'd never experienced before. Something in the back of her mind told her that she'd committed an act with her sister, an incestuous act that she'd never be able to atone for. But she didn't seem to care. It felt so good, she thought dizzily. No one had ever made her feel that way. It felt so fucking good.

"Now it's your turn to do me!" Marie cried. Rising from the bed, Marie hurriedly stripped off her blouse, leaving herself completely naked. Kelly's cheeks blushed with shame as she realized that looking at Marie was making her very horny. She had such a slim, lithe body, such firm, rounded tits and such stiff, purplish nipples. Her pussy creamed at the sight of Marie's small ass cheeks and cunt triangle.

"God, Kelly! Sometimes I wish I had really big tits like you!"

Falling back onto the bed, Marie hurriedly stripped off Kelly's nightie, leaving her naked too. Burying her head in Kelly's cleavage, Marie rolled her small hands over her sister's huge cherry-capped tits. Kelly found herself shuddering in spite of herself at her horny sister's touch, her tits swelling, the nipples crinkling stiff with passion.