"You liked that, didn't you, Sylvia?" Jill licked your lips. "Ummm, your pussy really tasted good! You ought to come over and let me suck your cunt a lot more often."

"You're… such a slut," Sylvia moaned. "I'm your sister. You don't even care."

"Wow, Sylvia, look at your nipples," Jill murmured. "Look how stiff they are!"

Suddenly Jill had joined her on the couch again, straddling her bare thighs, wiggling her naked ass on her legs as she filled her hands with Sylvia's enormous tits. Hungrily Jill kneaded and squeezed the giant tits, then started to pull up Sylvia's blouse.

"Stop it," Sylvia moaned.

"Wow, you've got such huge tits," Jill sighed. "I mean, I've got big ones too, but yours are really whoppers. I swear, I used to really spend a lot of time staring at your tits when I was a kid. I used to think about them when I jacked off, even before I started thinking about cocks."

"You're disgusting."

"I want to see 'em!"

Jill roughly pulled off the blouse, groaning at the sight of her sister's mammoth tits. Hurriedly Jill undid the clasp, letting the giant tits wiggle out of confinement. Sylvia's nipples were at least three inches wide, dotted with little goosebumps, now swollen to a deep violet in color. Her rubbery teats protruded nearly an inch.

"Oh, shit, they feel so good!" Lewdly Jill rolled her enormous naked tits under her palms, sighing as she kit the spongy softness of her tit globes. "Can I suck on them?"

Jill lowered her head, opening her mouth as wide as she could, enveloping all three inches of Sylvia's stiff, sensitive nipple. Jill puckered her cheeks and started sucking very hard, basting her teat with saliva, slurping noisily on her big sister's tit. Sylvia moaned as her pussy started throbbing again, as the wet, horny tit sucking made her cunt burn with fresh need. Shamefully she cradled her blonde sister's head, silently encouraging Jill to suck her stiff nipples as hard and long as she liked.