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"It's okay, Dad. Let me suck it."
Tweek sat on his knees before his nervous father. He was finally face-to-face with Craig's big cock, something he'd been dying to see since puberty. It was so fucking big, veiny and throbbing right in Tweek's face. Thick, coarse, trimmed hair crowned the base and covered the big, hanging balls. The shaft twitched when Tweek brought a soft hand up, touching it with lewd innocence.
Craig panted as he stood, baring himself to his son. He couldn't believe that he let this happen, that he was letting his son see and touch his cock. Knowing that Tweek's intention was to suck it made him swallow deeply, a shameful shudder wracking his body.
He should be stopping this.
Yet, he couldn't bring himself to stop Tweek. Not when he was sliding his warm, soft tongue up his cock, all the way to the tip before giving it a gentle kiss. That sweet little tongue circled the head, drawing a groan out of Craig. His son's pretty blue eyes watched him pant with a look he'd never seen Tweek give him before.
“Tweek, this is wrong,” he tensed his jaw after he spoke, swallowing down some of his apprehension. His saliva felt thick as it travelled down his esophagus, his stomach twisting into tight knots.
His son went lower, laving his tongue greedily across his aching balls before pulling the right one into his mouth and sucking it softly, all while pushing and rubbing his face up against Craig's cock. Tweek's eyes went half-lidded, staring up at his Dad with nothing but love and trust. He released Craig's ball with a pop, licking his lips and taking the generous shaft into both hands, marveling at the size and hardness before looking back up into Craig's eyes. “Dad, I've always wanted this,” he assured, stroking Craig slowly and with purpose. “You taste so good, please don't make me stop.” Craig's balls jumped when Tweek focused on rubbing over his coronal ridge, and did once more when Tweek wrapped his tongue around the head and welcomed it into his mouth.
Shame. Self-loathing. Embarrassment. Failure.
Wrong.
Tweek slowly started to move, pulling back and leaving just a bit of his Dad's cockhead in his mouth before taking it back in. His tongue lapped up from his frenulum to his slit with each movement, collecting any precum that oozed out of him.
“Fuuuuuck,” Craig groaned, tilting his head back and closing his eyes. He recalled the way his son's tongue had felt in his own mouth when they had been kissing before Tweek got on his knees. It was much smaller than his, but just as eager. His heart pounded in his ears. The way Tweek fucking mewled in his mouth when he sucked on his plump bottom lip...it took away any remaining fragment of Craig's restraint. He was a goner as soon as he pulled back and gazed into his son's dazed eyes and saw him lick his lips, hungry for whatever traces of his Dad's kiss had been left behind.
“Mmmmm...” Tweek moaned around his Dad's cock, slowly taking more of it in, feeling every excited throb. The taste was making Tweek's head go fuzzy. He'd spent years imagining what his Dad's dick would taste like, and the reality was so much better than the big dildo he'd practiced on. He knew Craig would be big, after all it was impossible not to notice that gargantuan bulge whenever he walked around the house in boxer briefs or grey sweatpants.
He decided to try taking it all in, as he had gotten good at throating down his toy.
Inch by inch, Craig watched his son take in his massive cock. Those pretty lips he'd taken his time kissing earlier slipped further and further down, towards the base. His breath hitched in his throat, his body tensing up, feeling ready to snap like a taut wire. “Oh, Christ,” he astonished, breathing shallowly as he waited for what felt like minutes for Tweek to take it all.
Tweek could feel his throat bulging, stuffed full of Dad cock. That fat ballsack pressed against his smooth chin, his nose buried in the delightful musk of his Dad's pubic hair. He'd finally done it. He felt the muscles of his throat working around the large obstruction, accommodating it the way he'd trained them to. Every breath pulled Craig's strong scent into his lungs, liquefying his thoughts into a lustful river. He could never get enough of his Dad's smell, and being this close to it was affecting him greatly, like a drug. All the shirts and old hats he had stolen from Craig's closet didn't smell even half as good as Craig's cock and balls.
When Tweek began to move back up the shaft and slide back down to the base, Craig placed a big, trembling hand on his head. It instantly reminded Craig of how he would pat his son on the head when he got good grades or remembered to brush his teeth.
He never knew it would eventually turn into anything like this. That he'd be standing in his nineteen year-old adopted son's room, letting him do this. The recollection of all those cherished moments he had spent raising Tweek somehow strengthened his arousal. The sense that he was doing something unforgivable and disgusting gradually faded as Tweek worked his cock, his throat audibly clenching and unclenching around it.
All the love in his heart for his son swirled and danced with a perverted lust, twisting into something foul. Something he never expected himself to ever be capable of feeling.
It was a deep, primal urge to pin him down and fuck him.
He took ahold of Tweek's head with both hands before thrusting forward, pushing himself as deep as possible into his son's throat. Tweek's eyes widened in surprise, but he did not struggle, instead gripping his Dad's thighs and moving with him.
Craig distantly felt disbelief that he was fucking his son's face. That his son was so desperate for his cock that he had convinced him to let him see it in the first place. The last thing he had expected was to start a sexual relationship with Tweek, or to be balls deep in his tight throat. But there he was, doing something no father should ever do.
Tweek moaned again, bobbing his head and running his hands up and down Craig's muscular thighs as he sucked his dick. His time training with his toy had paid off. His Dad was fucking huge.
“Tweek, get up,” Craig ordered, pushing against his son's forehead.
Tweek whined around his cock, slowing to a pause and giving Craig a pitiful look. Slowly, he pulled his mouth off, his throat getting lonelier and lonelier with every inch that left it. “Dad,” he started, pouting up at Craig. He wiped some saliva from his chin, licking his lips to catch any remaining taste of Craig that lingered on them.
Craig pulled him up and shoved him against the wall with a thud, groping his hips and ass and kissing him deeply. His son immediately reciprocated, hands flying up to tug at his hair, making him growl into his son's mouth. He could taste his own cock from kissing Tweek, and the reality that he'd had his dick sucked by his own boy struck him hard. It drove him to pull Tweek's hair, yanking his head back to give him access to his neck.
“Ah!” Tweek dug his fingers into Craig's scalp when he bit his neck before sucking the mark he left. “Dad, fuck me,” Craig groaned against his neck, slipping his hands beneath Tweek's pants and underwear to squeeze his ass directly.
“Yeah?” Craig asked. “You want Dad to fuck you, honey?” He delighted in the whimper his son made at the pet name. Tweek nodded feverishly, tugging harder at Craig's hair.
He blew over the wet skin, causing Tweek's knees to shake. “Get on your bed, Tweek.” Craig pulled away, taking Tweek's wrists and guiding him towards his bed.
Tweek's heart was pounding.
He was about to get fucked by his Dad.
And he wanted it.
Tweek sat in the middle of his bed, quickly struggling with the buttons of his shirt while his Dad opened his nightstand drawer to look for lube. “It-it's on the right,” he told Craig, tossing his shirt to the floor. “I don't have any condoms.” Craig shut the nightstand, bottle of lube in hand, his cock still out.
“We don't need one, honey.”
Tweek trusted Craig. He was ready to have his virginity taken, condom or not.
…and he wanted Craig to cum inside him.
The bed dipped as his father joined him in it. He waited for his Dad's instruction, shirtless and a little nervous. Craig kissed him, reaching down to unbutton the jeans that had been driving him crazy for months. He'd been hating himself for admiring his son's hips and ass since he got these jeans, but he just couldn't help himself. Tweek was very, very much a breedable boy.
Tweek's zipper came down, followed by his Dad pulling his jeans down to his knees and helping him take them off completely. Craig tossed them aside, palming Tweek through his briefs. Tweek gasped at the contact, his cock jumping when he saw how big Craig's hand was on top of it. He could probably fit the whole thing in just his palm, and Tweek wasn't exactly small. His Dad just had really big hands.
Calloused palms slipped beneath the elastic waistband, removing Tweek's briefs. His dick landed with a plop against his tense stomach. It twitched more when Craig reached for it, and Tweek was right, a single hand was able to grip his whole length. His Dad rubbed him up and down, watching his foreskin cover and uncover his glans.
As much as he loved his Dad's touch there, he wanted his fingers inside him, stretching him open for his cock. He shifted his weight a bit, gesturing to the lube in Craig's other hand. “W-will you..?” He asked, blushing. He was very much capable of preparing himself, but he wanted his Dad to be the one to do it. This time was special.
“Of course, honey,” Craig gave a couple parting strokes and popped open the lid of the lube, squirting some out onto his fingers. “Lean back for me.” He rubbed his fingers and thumb together, warming up the lube and watching Tweek lie on his back, opening his legs and showing him that adorable pink hole.
The first finger was a slight challenge. Craig's fingers were thicker and longer than Tweek's, and Craig only got to the first knuckle before feeling Tweek tense up inside. “Relax, baby,” Tweek's brow furrowed cutely, trying his best to stop tensing. He recalled how he would train with his toy, remembering to push out to open up his hole. “There we go...” Craig praised him, sliding his finger in deeper.
“Ah! Mmm..!”
Craig curled his finger upwards, feeling around for his son's prostate. When he found that sensitive gland, he watched Tweek's face, enjoying the sight of him flushing and panting at the stimulation. “Dad, that feels good,” Tweek panted out, his dick already leaking.
It took less time than Craig had thought it would to prepare his son. Tweek was very well-trained, able to take three of his Dad's fingers. Craig knew it was time to stop when Tweek became a bit restless and squirmy. His hole was relaxed and stretched enough to handle his cock. Craig took out his fingers, pushing Tweek's knees up and apart before slicking himself with lube. He settled between Tweek's legs, almost crouching over him. “Are you ready, Tweek?” Tweek answered his question by nodding quickly and reaching up to his face. Craig kissed him again, softly, conveying his love for his son.
Carefully, he lined himself up, pressing the head in and listening to the sounds Tweek made as he was entered. Little whimpers and gasps as he welcomed him inside. It was so, so precious.
A guttural moan left Craig when he was fully inside of Tweek. He was tight, warm, and trembling around his girth. It was fucking heavenly. “Oh Jesus,” Tweek rasped, hot breath puffing against Craig's face. Craig stayed still, waiting for the muscles to relax and accept him.
The younger man swallowed deeply, gazing up at his father in amazement. At his giant fucking cock, and the fact that they were having sex. He was having sex with his father, and he was enjoying it. He wanted more.
“Dad, please, you can move...”
The drag of his Dad's cock pulling out of him was almost overwhelming, like it would take his soul out along with it. The push back in made him feel complete, and so full. Craig kissed him once more, slipping his tongue inside and meeting his own. They kissed passionately, Craig still moving, coaxing fragile moans out of his son.
Faster, he needed to go faster.
Tweek yelped, gripping at his thick biceps as he quickened his pace. As much as he wanted to make love to his son, he needed to fuck him. His boy tightened around him, taking him so well, just the way he'd always been meant to.
“You like that?” Craig asked, pressing into Tweek with added firmness. He dragged his cock out languidly, angling himself so the head caught on his son's prostate. Tweek squeaked, whimpering out a broken yes. A shiny, milky bead of precum dribbled out of his cock, oozing onto his tummy. He tilted his head down to look, his bright eyes flying wide when he was that Craig's cock was making his lower stomach actually bulge, stuffed so full it just couldn't hide it.
“Oh Daddy,” Tweek breathed out, followed by a precious little sob.
Craig's left eyebrow twitched.
He started to pound into his son. His big, heavy balls smacked into Tweek's ass with every downward, forceful thrust. It rocked Tweek's entire body, nearly knocking the air out of his lungs. His son shuddered beneath him, his insides fluttering around him. “Dad, dad, you feel so good!” Craig grunted, concentrating hard on hammering into Tweek and holding his legs apart, determined to pump him full. “Fuck me, oh Jesus, ah-aahhhh!” His son's cries only motivated Craig to fuck him harder. The slaps of their sweaty skin echoed in Tweek's bedroom, along with the slick sounds of lube squelching around Craig's cock.
“Yeah, that's my boy,” Craig panted, shifting the angle just a little to the left, causing his son to release a high-pitched whine and curl his toes. He must have been hitting his prostate even better than before, and he wasted no time in continuing to fuck into that spot, squeezing Tweek's shoulders and watching him fall apart beneath him. Distantly, he heard the headboard banging against the wall, the mattress groaning in time with Craig's thrusts.
Tweek was in absolute heaven. He was living the dream he'd had since forever ago. He smiled, squeezing his legs around Craig to hold him close. Craig was a mountain of a man, built tall and wide, and being pinned to a bed and bred by him was a life-changing experience. He could feel his brain chemistry being altered. He belonged to Craig now, there was no going back to their normal lives. He wanted this every single fucking day from then on.
“Dad-! I, I..!” Tweek cried out, barely able to breathe between the pounding and his own rapid breathing. He gasped loudly with every heavy thrust, gripping his Dad's arms tightly. Craig could tell he was close, his pretty little face and all of those desperate, needy noises could only mean one thing. He felt that sweet hole clench around him, squeezing him like it didn't want to let go. Tweek's knees fought to close around Craig, his heels digging into his lower back. He was letting his Dad fuck him, and he was going to cum from it.
With a trembling arch of his back, Craig's son came, screaming “Dad, Dad, Daaaad..!” His moans devolved into breathless, incoherent babbles. His cum shot onto his stomach, thin at first. Each spurt of semen thickened as he came on his Dad's cock, his own cock throbbing rapidly, eyes rolling back into his head.
“That's it, baby. Cum for Dad, make me proud...” Tweek shuddered beneath his father, the filthy, sick praise delighting him into the depths of his pulverized thoughts. His body spasmed under Craig, wringing itself dry, his noises tapering off into blissful whimpers as his orgasm washed over him.
When Craig came inside his son, a long, deep groan rumbled out of his chest. His heavy ballsack pulsed rhythmically against the split of Tweek's ass, working to empty every last drop. Craig felt them completely unload into his son, his shaft twitching with each load that shot into Tweek. He ground down into him, not stopping until his balls were totally drained. Tweek could only lie there helplessly, almost being crushed under the weight of his father. He moaned softly, holding onto his Dad, completely fucked out and almost sleepy. His legs were only supported by Craig being between them, no longer able to hold them up and apart himself. Craig panted over him, tired from the exertion, but his instincts kept him grinding down into Tweek even after he was done.
“Dad...I love you,” Tweek cooed up at him, blinking slowly. Craig leaned down, kissing his son. It wasn't a filthy kiss like before, it was a pure, loving one. Something more than a familial kiss. His grinding slowed, and he pressed his forehead against Tweek's.
“I love you, too, Tweek.”
His son smiled up at him, looking like he was about to cry from joy. Craig kissed his forehead before pulling out of him, his load slowly leaking out of Tweek's hole. He moved to lay behind his son, rolling Tweek onto his side so he could spoon him.
That was the safest Tweek had ever felt. Naked, loved, being held by his Dad, all while his Dad's warm love oozed out of him. He took in a deep breath, sighing in contentment. He giggled boyishly when Craig kissed at his neck and squeezed him tight.
The next morning, Craig fucked him again in the mess of pillows and sheets. He couldn't say no to his son, not when the first thing he said in the morning was “Dad...will you fuck me again, please?” While rubbing the sleep from his eyes.