Red-faced and guilty, shocked by her own lesbian incestuous passion, Sylvia realized that she was now much, much too horny to make her nympho sister stop. Her ass started moving off the couch, her enormous tits jiggling as she wiggled and humped. Her hands came down, clutching Sylvia's head, curling in her long, blonde hair. Then she started humping in a delirium of passion, groaning and whimpering, fucking her throbbing pussy on her sister's face.

"Hold still," Jill said. The nympho blonde raised her head momentarily, giggling as she pushed two fingers in and out of Sylvia's cunt. "Wow, you really are horny, aren't you?"

"Suck it some more," Sylvia gasped. "Oh, please…"

"Did your cunt get this wet when you looked at Tony's big cock?" Jill whispered. "It's okay to fantasize about it, Sylvia. Would you like to think about your son's big hard, cock while I suck your pussy?"

"Oh, you're awful. You're such a slut."

Jill just giggled, again burying her face between her big sister's splayed, trembling thighs. Now she sucked her hairy, throbbing pussy with concentration, peeling her swollen cunt-lips delicately apart, exposing the glistening pink interior of her big sister's painfully horny cunt.

Jill mooned, loving the taste of the brunette's fuck-juices. Avidly she licked and lapped and sucked, as if determined to lick all of the cunt cream out of her big sister's cunt. Her mouth moved gradually high, her tongue popping out to thrust deep inside the gooey fuck-opening. Then Jill started licking directly on her swollen, aching clit, making Sylvia's whole body quiver helplessly with lust.

"Oh, fuck!" Sylvia whined. Desperately she clawed the back of her sister's head, trying to hold Jill's mouth on her clit. "Suck it! Please, please, suck it, lick it! Oh, fuck, fuck."