"Fantastic!" he said. "Fucking fantastic!"
Robin pulled away from his body, still enjoying the throbbing sensations in her cunt. His cockhead slipped forward, then flopped out her shitter opening with a dull thud against his stomach. She threw her leg over and sat down beside his crotch.
"This is the best part!" she said, lowering her head.
She clutched his withering cock with both hands and pressed it against her lips. She licked up and down the shaft, sucking in the spent wads of cum with eager lapping motions. The cooling cream warmed again as she wallowed them around in her mouth, then reluctantly allowed them to ooze into the back of her throat.
"Mmmmmmmm!" she murmured. "It's so delicious!"
"You mean you like that stuff?" Alex asked sleepily.
"I could drink a million gallons of it!"
"Well, I don't think I have quite that much, but you can sure have all you can suck out!"
"You think you can go again so soon?" she asked, amazement in her voice.
"Why don't you find out for yourself?" he asked, pressing the back of her head.
The flavor of her musky asshole, clinging to his shaft caressed the back of her throat like a gentle spice. It mixed with the aroma of his cum, causing a tremor of excitement to rush through her body.
"I love your cock!" she gurgled, sucking the thickness of his prod deeply into her throat.
"Uuuuuunnnhhhh!" Alex moaned. "Suck it good, you little cum-eating cunt!"
He pushed his hips upward as he pressed brutally against the back of her head. He felt his cockhead smack against her tonsils, then sink into the back of her throat.
Robin was hardly prepared for such an immediate assault in her throat. She tried to take it all, relaxing her throat muscles, but it was too big! She gasped for aft and tried to pull away, but her brother refused to release the pressure that kept her there.
"Chew it, you little cocksucker!" Alex moaned, pumping upward. "Eat it into your throat!"
Robin began to squirm around as her breath left her. She thought her lungs would explode from lack of air, yet her brother only increased the pressure of his hands. She began to get dizzy and light-headed.
"Uuuuummmmphhhf!" she gurgled as she dug her nails into his stomach.
Alex let go of her head and flopped his cock out of her mouth. "What's the matter?" he asked.
"Don't you want it?"
"God, yes! But it's so big! Too big!" she answered, gasping for air.
"Just relax," he said. "Work on my balls for a while."
She pound her nose against the underside of his shaft and pulled his nuts between her lips. The hairy, hard texture scraped against the roof of her mouth causing her to shiver with ecstasy. She grabbed his cock with both hands and began flopping it around on her face, pressing the loose foreskin against her eyes.
"You'd better get back to sucking my dick," Alex whispered, "or I'll cum all over your face!"
His words seemed to inflame the hunger in her throat. She pushed his nuts out of her mouth with her tongue and licked upward until her lips burned against his cockhead. With one movement, she gobbled the entire length of his dick into her throat.
"I thought you said it was too big!" Alex said. Robin clamped her mouth around the base of his prick anti pulled upward. Her lips left a glistening trail of spit that reflected the light in the room.
"I don't think a cock could ever be too big!" she said from the side of her mouth. "I think I could suck your cock and balls at the same time!"
"Try it," Alex said, his tone eager. "Go ahead, suck all of me!"
She placed the end of his dick between her lips again and slowly sucked downward. His prick seemed to swell to an even greater size than before, but she was determined to give him what he wanted, or die trying.
"Oh God, you've got a mouth like a cunt!" Alex moaned. "So fucking tight and hot!"
She ground her lips around the base of his cock, and with her thumbs, pushed his balls upward. She stretched her lower lip and squeezed the hairy orbs inside her mouth, one at a time.
"Damn! I don't believe you can do it!" Alex said, both amazed and filled with lust.
Robin felt his cockhead burn into her lungs as she forced her head savagely against his crotch. His pubic hairs were at the same time silky and scratchy, and smelled wonderful, like spicy musk. When she moaned, emptying her lungs of air, the vibration of her voice gurgled wetly.
Alex wrapped his left leg around her neck and pulled her even harder into his groin. He humped upward, unable to believe the fantastic warmth of her mouth.
"I don't know if I can hold out much longer!" he said.
Robin, herself, didn't know how much longer she could hold out. His nuts pulsated against her cheeks like boiling golf balls, and his cockhead completely cut off her air. She tried to pull away, but she was no match for his strength or his overpowering desire.
Suddenly a stabbing warmth shot into her chest.
His cockhead swelled to the limit as it began spitting out thick, volcanic-like wads of steaming cum. She inhaled his sperm with a gurgle, thoroughly enjoying the sticky fluid as it oozed downward, into her lungs.
"Drink it, you fucking cocksucker!" Alex groaned. "Suck out my cum and gargle it!"
For a second, he released the pressure of his hands and leg, allowing his sister to breathe. She pulled upward, sucked in a quick gasp of air, letting the exploding balls slip out of her mouth. Then, she sucked his dick back into her throat with an eager, hungry move.
"Aaaaggghhh!" she groaned as her mouth completely filled with burning sperm.
The fluid shot into her body like an electric jolt. As the amount increased, she felt a wild, plunging warmth in the back of her cunt. Then, she felt a torrent of spasms that jerked her pussy walls with convulsing orgasm.
Alex began jabbing his spewing cock brutally between her lips as his pleasure increased. The warmth of her mouth and the spilling gobs of jism that gushed out of her mouth and onto his balls were almost too much to bear.
"Suuuuuucccckkk!" he wailed, jamming his body upward. "Su… suck it, you cumeating cocksucker!!"
Robin gobbled as quickly as possible, but even her eager throat couldn't take it all. Huge masses of sperm collected behind her nostrils and squirted out her nose.
Finally, Alex gave a last, powerful lunge upward, burying the last of his hot load into her lungs. He flinched every muscle in his body for a few seconds, then slowly relaxed.
Robin was oblivious to everything in the world except for three things: her brother's hot, steamy cum, his delicious cock, and the powerful stabs of release that ground into her cunt.
After several long, delicious moments of spasming orgasm, she pulled her mouth upward, releasing his cock.
"God, that tastes so good!" she moaned, her voice greasy and wet with a residue of cum that clung to her throat.
She looked at his prick with a loving expression and kissed it gently. The sperm-smeared shaft throbbed against her mouth with sticky warmth. She squeezed the base of his prick with both hands and slowly pulled upward.
"Look!" she said. "Some more!"
A milky glob of cum squirted out of his cum hole and gently oozed onto his foreskin. Robin lapped her tongue out and pulled the thick mass between her lips. She closed her eyes and moaned passionately as the wad sank into the back of her throat.
"Good!" she gurgled. "I want to suck you forever!"
"You know," Alex said softly, "I honestly believe you could get cum out of a crowbar!"
Robin giggled, then sucked his cock back into her mouth. She cupped his balls and pulled them against her cheeks, eager once again to eat some more of his jism. She knew it would take a little longer this time, but it would be worth it.