"You're so wet tonight, Sally," he whispered. "Why don't we try another way to fuck?"

Sally knitted her forehead, wondering what her uncle meant. Then she felt his finger probing her pink asshole, massaging the puffy, hairless ass ring. Fresh juice creamed her pussy as she thought of having her asshole fucked for the very first time.

"Do you want to take it there, Sally?" Bob asked, his voice breaking with desire. "Up your sweet teenage ass?"

"Yesss," Sally hissed. Hornily she flexed her asshole on his finger, as if to invite his cock into her ass passage. "I really want to do it that way a lot! But be gentle with me, Uncle Bob! Your cock is so big for my asshole!"

Her dirty words made Bob's prick lurch to total stiffness, as if he'd never cum at all. He dipped his fingers into her wet cunt and used some of her pussy cream to slick down her asshole, lubricating the little fuck hole for the invasion of his cock.

Then he replaced his finger with the knob of his pulsing prick. Sally moaned throatily as she felt the big prickhead separating the rubbery lips of her asshole around the crown of his cock.

"That's good, Uncle Bob!" Shamelessly she grabbed her ass cheeks and spread them wide apart, simultaneously starting to hump her pussy off the pillow. "Go in deeper now! I can take it!"

Bob again thrust his hands under her torso, gripping his niece's big tits for support. Slowly he worked his cock deeper and deeper into the forbidden heat of her asshole, fitting first a third, then over half of his prick between her peach-shaped ass cheeks.

"Ungghh! Unh, oh, Uncle Bob, unh!" Sally shivered lewdly as his big cock pulsed deep inside her ravaged ass tunnel. "It's really stretching me, Uncle Bob! Oh fuck, I can feel my asshole stretching to let in your dick! Fuck me all the way now! It feels so good up my fucking ass!"

Bob flexed the lean cheeks of his ass, fucking the rest of his cock home between her ass cheeks. Sally gasped as her stuffed asshole clung to all of his prick at once, sucking and milking the bloated, stiffness of the cockshaft.