"Wow," Jill purred, lifting her head long enough to admire the large, swollen bud. "You've got a big one!"

Jill wrapped her lips around Sylvia's aching clit, sucking it hard, as if she were trying to nurse milk out of a stiff nipple. Three fingers straightened, gliding deep inside Sylvia's burning, horny pussy. Jill jacked off her cunt fast and hard, sucking the tingling clit, licking the underside hard with her tongue.

"Oh, shit, oh, fuck, fuck…" Sylvia clawed the back of Jill's head, writhing and humping, her expression obscenely contorted as the intense pleasure of the sucking throbbed through her loins. "Suck it! Oh, fuck, it feels so good! Suck… annnhhh, not so hard! Ohhhh, ohhhhh…"

But Jill sucked very hard, puckering her cheeks around her throbbing clit, slurping so feverishly that the pleasure became painful and unbearably intense at the same time. Sylvia writhed as mindlessly as a horny animal, shuddering and moaning, not knowing whether to pull away from her sister's vacuuming mouth or to thrust her cunt on Jill's mouth as hard as she could.

"I'm cuming!" she shrieked. "Oh, fuck, fuck, suck on it! Ahhhh, fuck, fuck, suck on it! Ahhhh fuck, fuck, cuuummmiiinnngggg!"

Her cunt spumed violently, sucking the fingers that pounded in and out of her hairy fuck-hole, her clit pulsing like a tiny heart between Jill's lips. Jill finally stopped sucking so hard, instead using just enough pressure to make the cum last a long time. Helplessly Sylvia writhed in ecstasy on the couch, clawing Jill's neck, humping her ass until the contractions finally diminished deep inside her cunt.

"Oh, motherfucker!" Sylvia moaned. "Oh, that was… oh, Jill… Jill…"

Jill didn't answer for nearly a minute. The naked blonde was still busily lapping the musky fuck-juice out of her big sister's pussy, holding the swollen cunt-lips open as she shamelessly tongued all the cream out of Sylvia's cunt. When Jill finally raised her head, the cunt-juice shone in a blotchy circle all around her mouth. Jill giggled unconcernedly.