"Karen?" Sarah cried out.

"Oh, yes, Sarah!" Karen purred, ramming her finger deep into her sister's cunt. "Come, Sarah!"

Sarah's cunt was exploding, the hairy lips in spasms of tight heat, her clit bursting. She cried out and smashed her hand on top of her sister's, pushing the buried finger a bit deeper. The orgasm was good, but it was not as strong as having her son's cock in her cunt. When the orgasm faded, she was no more relieved than before, and her cunt burned and seeped just as insatiably.

"My, you are in bad shape, aren't you?" Karen whispered against her ear, pumping her finger in and out once more. "You need some more, don't you, Sarah?"

"God, oh my God!" Sarah cried out. "I need much more, Karen! I need… need so much more!"

"Here," Karen said, slipping her hand out of Sarah's panties and pulling her across the room to the couch. "I'll do you up good."

Sarah didn't resist as her sister knelt before her, dragging her tight bikini panties down. She stepped from them, holding her dress up herself. When Karen gently pushed her to the couch, she sat down willingly, her eyes smoldering as she breathed excitedly. Karen pushed her knees apart, gazing at the juicy pink cunt with the soft curls of hair along the slit, wide at the top. Sarah began to churn her ass when her sister caressed the soft inner flesh of her thighs, then stroked her throbbing cunt tenderly. Sarah's hand whipped up to her tits, clasping them inside her dress, arching her cunt to Karen's hand, twisting with passion.

Karen pushed her sister's legs wider, and Sarah cried out and flung them apart, pushing her cunt to Karen's hands. Karen used both hands, her fingers spreading the pink wet cunt, then smashing the hairy lips together. She spread Sarah's cunt again, watching her cunt bulge up with fiery stiffness.