"Unngggh! Oh, Jimmy!" Karen's pretty face contorted into an anguished expression as she submitted to sodomy. She wriggled beneath him, trying to help him slide his big dong into her hot, lubed-up ass.

"It feels so big, Jimmy! Unagugh! You've got such a big cock! Umigggh! Push it in deep, honey! My asshole needs fucking! Oh, deep, deep…"

Jimmy panted as he labored on top of her, feeling her strong, rubbery shit channel contracting convulsively around his cock. He pushed down hard, sinking half of his cock up her shit chute, then two thirds. Karen gasped and started humping, holding her ass cheeks spread open, fucking her open, throbbing asshole onto his dick.

"Ram it in hard, Jimmy! Fuck my asshole good!"

Jimmy grunted, bucking hard, suddenly spearing every inch of his huge cock into the sucking tightness of his sister's bowels. For several seconds he lay motionless on top of her, letting her aching asshole stretch to accommodate the thickness of his prick.

"Oh, Jimmy, Jimmy! Your dick's so fucking big!"

Jimmy started butt fucking her. He moved slowly at first, groaning with the pleasure of sodomy as he slid his rigid, cum-bloated cock lance in and out of her asshole, smoothly stroking into the depths of her bowels.

But his naked big sister was humping so furiously beneath him that he couldn't hold himself back. Soon Jimmy was fucking her tight little asshole much faster, panting on her shoulder, making the bed springs squeak as he drilled his prick into her shit-sphincter, reaching the depths of her bowels with every stoke.

"Harder, Jimmy! Unh, love your big boner, Jimmy! Oh, fuck, oh, shit! My asshole loves your big dick!"

The naked sister stopped holding her ass cheeks spread open, no longer needing to know that Jimmy had his dong imbedded in her bowels. Eagerly she thrust he hand under her belly, groping through her pussy curls until she found the sticky, juice-oozing lips of her slit.