"Oh, God, Jack! That feels good!"
Jack nibbled lightly around the throbbing prong of her clit, then fastened his lips on it and began sucking as he bobbed up and down over it. His lips skimmed only an inch or two before slipping off, but then he started all over again. He heard her give a deep, moaning sigh and lifted his face.
"Do I do it better?"
"Better…?" Karen groaned, not understanding.
"Yeah, better than you?"
"Yes, yes! You suck better than me, you bastard! Now get your tongue back in that hole!"
Jack grinned and slipped the full length of his hot tongue into her quaking, drooling cunt. Karen's hips bucked out of control when she felt his lips fastened around the quivering rim of her cunt. But then he was fastened around the quivering rim of her cunt. But then he was pulling out and lapping downward. He scrubbed the sensitive strip of skin between her cunt and asshole for a long time, teasing her, then raised his head again.
"C'mon," he said, "do what you did in the bathroom, suck your clit for me. I'll take care of your cunt and ass."
Karen was so excited she would have sucked a monkey's ass if he'd asked her, so she rolled up on her shoulders and bent her head down to her swampy pussy.
When Jack saw his sister's full lips wrap around her clit, he felt his balls tighten. What a turn-on! In her obscene position, her clenching cunt and winking asshole were upturned and completely vulnerable. Jack drew his fingers over them.
"That's the way, Sis," he said. "Give that clit a good sucking and I'll make you come so hard the top of your head will blow off!"
Karen groaned and tormented her sparking clit with her lips, tongue and teeth. Her nose rubbed the rim of her bubbling cunt and Jack's nose as he bent and slurped up some of her pussy juice. Then he slid down to the puckered ring of her pink asshole. That prominent opening was throbbing, expanding and contracting with the strong sensations filling Karen's pussy.
"Mmmmm!" Karen groaned as she felt the feather-like softness of her brother's hot tongue scrub across her sensitive, wrinkled butthole.
Jack loved the taste and texture of his sister's ass, and gripped her upturned butt cheeks in his hands to hold and knead them while he poked at it. He felt the tip of his tongue pushing into her tightly clamped asshole, slipping through the soft, delicate muscle and inserting itself in the satiny heat of her dark tunnel.
"Mmmhhh!" he groaned, tasting the muskiness of her tight shitter. He started sliding his tongue back and forth in the still-narrow, but opening ass channel. Karen's muffled moans were music to his ears as he rapidly tongue-fucked her asshole.
Karen was really writhing now, her ripe body shaking with the extreme pleasure of having her clit sucked while her asshole was filled with her brother's tongue. She began panting and snorting as she sucked, and Jack could feel her body rippling with joy every time he stabbed his tongue to its roots in her butthole.
Karen couldn't take much more. With a gasp for breath, she released her clit and tried to see what her brother was doing. She could feel very well, but she wanted to see…
"Ooohhh!" she wailed. "Leave it in! Leave it in!"
Jack pushed his tongue deep into her butthole and held it there with his lips pressed tightly to her winking ring. He could feel the hungry tug of her inner muscles and began curling the tip of his deeply imbedded tongue, twisting and licking at the contracting walls of her ass.
"Yaahhhh! Fuck it, fuck it," she cried. "I want to feel you in my asssss! Oh, stick your cock up there, please, Jack! I… I want it!"
Jack felt his cock swelling and burning until he thought it would burst. He'd never seen any woman get so hot she'd beg for his big cock in her ass. Jeez, if only Beth would let him play around with her asshole just once…
"I don't want to hurt you, Sis," he warned her, lifting his face and getting to his feet.
"Yes, yes! Hurt me! Shove that fat cock all the way up my ass! I want to feel it in me!"
"You want it bad, don't you?" Jack grinned, squeezing her hot butt cheeks.
"Yes! Damnit, yes!"
"Can you bend enough to lick your asshole, too?"
Karen lifted her eyes to her brother. "You're a depraved bastard, Jack. You know that? Even when we were kids you wanted to do kinky things."
"You complaining, Sis?"
"Hell, no!" She laughed. "I've licked my asshole a few times in the past."
"Let's see," he said.
Karen bent her head again and, with her knees past her ears, reached down and grabbed her ass. Her face turned red with the effort, but she managed to lash her tongue over her pink, spit-slick asshole while her brother watched and laughed.
"Great!" he said. "You think if I push down on your shoulders and neck a bit you could suck your asshole?"
"What've you got in mind?" she asked suspiciously.
"Nothing. Just thought you might get a kick out of sucking my cum out when I'm done."
"Wow!" Karen said, surprised. "That's a new one!"
"You don't mind, do you?"
"Shit, no! I've swallowed a gallon of cum in my life. But this'll be the first time I've had it second hand, and from my own ass!"
"And the first time it's come from me." He laughed. "How's it feel to be a brother-fucker? Sorta rhymes with something else, doesn't it?"
"Stop talkin' and start fuckin'," Karen said. "We haven't got all day, you know."
Jack leaned over her bent body, his hands holding her calves and pushing them even further past her head. His cock felt the steamy heat of her cunt hole and, after nudging her stiff clit, slipped inside.
"My ass, I said," Karen groaned as he pumped her pussy hole.
"Just getting my cock nice and wet again," Jack said. "Feels good, though. Maybe I oughta come here where you can suck it better…"
Karen's hand came down to fumble at his cock and he slapped it away. "Hold on," he said, pulling his wet cock from her sucking cunt. "You're gonna git it…" And he placed the broad, purplish head of his prick against the rosy, throbbing ring of her asshole.
"Ahhhhhhhh!" Karen wailed, her spine arching as her brother's enormous cockhead pushed into the tiny, wrinkled opening of her ass, spreading the tight flesh painfully.
Jack rested briefly. Only half of his fat cockhead was wedged in her butthole, but it felt as if someone had fastened a tourniquet over it! He groaned and heard Karen echo him as he leaned his weight into her ass and felt the head snap through.
He groaned again as her sphincter squeezed rhythmically, almost as if it were nibbling an ear of corn. "Here it comes!" he shouted, lunging forward and ramming his fat cock into her narrow shitter. The heat of her smooth, pulsating ass tissues made Jack realize just how much he'd been missing by fucking nothing but cunt since his marriage. Nothing in the world beat an asshole for tightness and heat. Mouths were all right, but they weren't tight, and they weren't as hot, and you couldn't go as deep. And accidents with teeth were always a possibility…
His heavy balls slapped noisily against his sister's upturned and widely spread ass with every slow, steady stroke. He wasn't going to fuck her ass like her cunt. He wanted this fuck to last. He intended to savor every hot, squeezing, throbbing moment of this buggering.
"Oh, darling!" Karen cried, clutching his lower back with her hands. "It's great! I never imagined it'd feel so good! I've always heard how awful this is, how painful… Oh, those poor women. What do they think their assholes are for, anyway? Jeez, if a good shit feels good, a good ass-fuck's bound to!"
Jack grinned and lustily fucked his sister's ass a little faster, watching his cock as he did it. He liked the way her asshole puckered out around it as he pulled back, his shaft all hard and greasy-looking, as if he'd smeared it with vaseline. Then, as he shoved back, the pink rim of her asshole sank with him, disappearing along with his cock into her dark depths.