"Not so hard, darling," Karen purred. On her hands and knees on the bed, she looked over her shoulder at her son humping between her legs. "You can fuck my cunt any time. I want you to save that big beautiful hard-on for my asshole!"
The sun streamed in through the window, illuminating the hotel room, shining in long rays across the cum-stained bed. Tony leaned over his mother's naked body and wrapped his hands greedily around her big hanging tits. He pumped his hips behind her jiggling ass, ramming his swollen prick again and again into the hairy opening of her pussy.
"Not so hard, lover," Karen protested gently. "We're just warming up, remember. You've already fucked my pussy so many times today."
Tony ignored her. He seemed intent on spurting his cum into the familiar depths of his mother's cunt. Faster and faster he humped her in the doggie position, grunting as his cock soaked in the buttery tunnel of her fuck-hole.
Karen stopped complaining. She lowered her shoulders and rested her cheek on her folded hands, lifting her ass so that Tony would be able to pump another half-inch of his delicious cock into her pussy.
What difference did it make if he fucked her pussy or her asshole? Karen decided. The main thing was that he was doing it. Her son, the best lover she'd ever had!
They'd been fucking steadily for three days now, any time they had more than twenty minutes to undress behind Phil's back. Karen was sure that her husband didn't suspect a thing, even though she'd fucked her son now more than a dozen times.
He was a fantastic lover, Karen thought proudly. At first Tony had been a little clumsy, but it hadn't taken long to teach her son everything. Now every fuck he gave her was a hundred times better than anything she'd gotten from Phil.
At first, Karen had been terrified that her husband might catch her in the act of fucking their son. Now she couldn't care less. In a way she even wanted to be caught. Then she could divorce Phil, and spend the rest of her days giving her mouth and pussy and asshole to her beloved boy.
"I'm ready now, Mom," Tony said anxiously. He withdrew his throbbing cock from her pussy, wincing as her cunt muscles sucked around the hardness of his dick. "I want to fuck your asshole now. Please, Mom, hurry!"
"Oh, darling…"
Karen fell on her stomach, stretching out flat on the mattress. She reached behind her and dug her hands into the cheeks of her firm ass. Spreading them apart, she exposed the puckered ring of her pink asshole.
Her body tingled with anticipation and desire. The nipples of her enormous tits were very stiff, and she could feel the delicious wetness coursing through her pussy. Even her asshole throbbed in and out in anticipation of her son's magnificent cock.
She wanted him to fuck her there. She had rarely allowed her husband to invade her asshole, unless he did her a special favor or begged for the forbidden pleasure. But her son was different. Tony fucked her so marvelously. She wanted to give him her naked body in any way she could.
"The Vaseline, Son," she whispered hotly. "Rub it in my asshole and all over your dick. You don't want to hurt me, do you?"
Tony grabbed the jar of petroleum jelly on the dresser next to the bed. Uncapping it, he withdrew a thick glob of the greasy substance on his fingers. Liberally he smeared it all over his twitching, cum-dripping prick, rubbing it from the knob to the very base of his shaft.
He took another hunk of the Vaseline and basted his mother's asshole. Karen sighed with pleasure as she felt his jelly-coated fingers rubbing over her small, puckered hole, darting into the rubbery tunnel within. Then Tony capped the jar and deposited it on the nightstand.
"Okay, darling," Karen purred. She separated her asscheeks a little farther and squirmed hornily on the mattress, rubbing her stiff-nippled tits into the sheets. "You're ready now. Fuck my asshole."
Tony leaned over his mother's nakedness. Holding the shaft of his prick, he carefully fit the knob against her hairless, tightly muscled asshole. Then he thrust forward almost imperceptibly, stabbing the knob of his dick into her rubbery ass-tunnel.
"Uhh…" Karen shuddered with pleasure as she felt her asshole walls separated by the head of his prick. "Gently now."
She clawed the sheets, rhythmically beginning to hump her ass up onto Tony's aching hardon. "Gently… all the way in…"
Tony paused to catch his breath, savoring the way his mother's asshole milked the tingling flesh of his cockhead. Then he began to press his prick into her ass.
The long blue-veined inches of his dick bored into her asshole. Karen felt his rod going deeper and deeper into her body, lubricated by the Vaseline as it invaded her ass. Then it was all the way in. Tony moaned in ecstasy as his hairy balls rested against her asscheeks.
"That was wonderful, darling," Karen murmured. "You got your dick so far in me, and you didn't hurt me at all."
"Oh, Mom, this is fantastic. Your asshole's so fucking tight!"
"Then fuck it, Son," Karen whimpered. Feverishly now she humped her ass, encouraging her son to ream out her ass as hard as he could. "Go ahead, if you like it so much. Fuck my asshole as hard as you want!"
Tony fell flat on his mother's naked back.
His hips began to jerk convulsively over her body. Seconds later be was fucking her asshole as hard as he could, making the bed shake and squeak on the hotel floor as he pounded his big cock into the rubbery grip of her ass-tunnel.
"Harder, Son, fuck me harder!" Karen begged. Desperately she tried to pull her asscheeks farther apart, wanting every inch of his enormous hard-on buried in her asshole. "Unggghhh! You're making me cum! Fuck meeee, Son, awwww yes, fuck my asshole!"
Tony pounded his throbbing dick into his mother's ass, grunting as he seemed to bore his prick deeper into her tunnel with every stroke. Reaching around her torso, he cupped her flattened tits and squeezed the huge globes as he fucked her. Karen felt the incredible stiffness of his cock, the way the knob drooled cum in the depths of her asshole. He was about to blow his wad any second, she could tell.
"I'm going to cum, Son!" she shrieked. "Ungghh! I want you to cum in me! Cum in my asshole! Nnngggg, fuck me, Son, fuck meeee!"
"Ahhhh," Tony sighed.
He thrust forward, ramming his cock into her asshole as far as he could. The cum shot in long, angry spurts from the knob of his dick. The load of his jism filled his mother's asshole completely. Leaning back, grimacing, Tony watched in fascination as his cum burbled out of her tightly puckered asshole-ring and ran down the insides of her thighs.
"Cumming now!" Karen cried. The spasms burned in her asshole, merging with the heat in her tits and cunt. She lifted her hips and humped her ass back into her son as hard as she could. "Fuck me haaaard, Son! Oh, Son, cuuummmiiinnnggg!"
When it was over, they lay on the bed together without moving. Tony kept his big prick buried in her asshole and kissed his mother tenderly on the shoulder. Karen giggled, smiled. It took her a while to realize that they were being watched.
A man stood at the bedroom door, which was now open. He was about forty years old. Most would have considered the man exceptionally handsome, but Karen was no longer attracted to him at all. His graying black hair was close-cropped. His body was tall and slim, and his jaw was strong and square. Now, staring wide-eyed at the spectacle on the bed, the man held his hand over his heart.
Karen giggled. "Hi, hubbie," she said teasingly. "Surprised?"