She envied her daughter a cuntful of Chuck's tongue – and, equally, she envied her son a snack on that sweet and delectable cunt.

"Feed me, Sis!" Chuck croaked.

His tongue was humming like a vibrator.

"Sit on my face, baby!" he urged.

His hands slid up her slim flanks and he cupped her by the trim cheeks of her ass.

Frostie lowered her loins and rubbed her cunt against his mouth and chin. She brushed her pussy up and down, mopping his whole face.

His nose sank into her cunt-slot and slid across her clit, and the boy whined like a doggy as she inhaled her tantalizing pussy perfume.

His tongue whisked and flailed. He lapped into her cunt-slot and slurped on her clit. He tongued both unfolded pussy-lips at the rim, then stabbed in as deep as his lapper would go, in a tongue-fucking action.

She rode his face, her ass twisting. Her thighs tensed and rippled as she saddled her groin on his head, jerking in spasmodic bliss.

Whatever the boy lacked in technique, he more than made up for by enthusiasm.

Their mother could hear Chuck slurp and slobber as he gorged in the girl's gooey groin.

She could see his nimble tongue flash in and out, spooning out cunt-juice lavishly.

Then the youth clamped his mouth to his sister's pussy and began to quaff steadily.

She shuddered all through her nubile body.

"Yeah – eat, baby! Eat!" she wailed.

The flow from her cunt was getting hotter and thicker and more fragrant as her juice turned to cunt-cum. It was pouring into his mouth like heated wax.

She reached down and used her fingertips to spread her pussy open wider, as if she were trying to stretch the pliable slot right over his head – to put her pussy on his face like a rubber on a prick.

Chuck munched and gobbled ravenously, drinking the girl's goo with gusto.