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Robert remembered the overwhelming sense of shame he felt when he first called Katon-Ur 'father'. His skin flushed wildly, and the regret was an immediate thing, thick and lodged in the root of his throat as he waited under Katon's scrutiny.
He hadn't expected the offworlder to smile so tenderly in return.
It'd been something they discussed in detail, going over the ins and outs of this new world—roleplay.
Katon was quick to catch on to the nuance of the act, much to Robert's relief. He even divulged his own contentions with his parents, riffling through the odd, apathetic approaches his species took to fostering their youth.
He told Robert of the confusion he experienced when he saw how nurturing humanity was with their young. He was enamored by the caring nature of human mothers, and the protective qualities of human fathers. Robert, albeit with a lot of dismay, told Katon that the children of Earth who were born to parents like the ones he revered so much were the lucky ones. Not all kids got good moms and dads.
Robert sure didn't.
Katon's reaction was one of reflection, rather than the pity Robert supposed he'd feel. His gaze was faraway, the glints of his memories from beyond Earth waltzing in the blue of his eyes.
Robert sated the offworlder's curiosity about his childhood. With Katon, he didn't feel that nagging compulsion to spare details and minimize his wounds from the past. Katon sat and listened, exuding an attentiveness energy that always left Robert's heart floaty and light.
Incorporating the arrangement into sex was seamless.
When Katon fucked him gently as his father, he felt taken care of—like he was worth the time it took to properly love a child. When the sex was rough, it re-contextualized the verbal and physical reprimands he endured as a kid, transforming the fear into a gratifying pleasure-pain.
On the other hand, Katon took the opportunity to assume a parental role, dissecting the mental affects of his culture and transcending those neglectful predispositions. His love for Robert fit well into the mold of imitated fatherhood.
They found synergy in their combined desires. It came naturally to them.
Tonight was no different.
They were on Katon's bed—Robert sitting in between Katon's thighs, his back pressed flush to the offworlder's broad chest. They were both bare, warm and relishing in their skin-to-skin contact. In this position, Robert felt surrounded, protected. Like nothing in the universe could touch him as long as Katon held him in his arms.
Katon's large hand was between his thighs, two of his thick fingers already plunged deep in Robert's cunt. Robert rolled his head back and laid it on Katon's shoulder, losing himself in the brimful sensation, gasping for air as he curled his digits into the spot that brought stars to life in Robert's sight.
"Will you make me proud, my son?" Katon breathed into Robert's hair, his cadence low and syrupy. "Can you take one more?"
That 'my son' always got Robert good, made his stomach do delighted little somersaults.
"Y-Yes, hng- please ughn-" Robert reached back to card his fingers through Katon's hair, clenching desperately around the addicting curl of his fingers.
"I know you can," Katon murmured softly, fucking his fingers into Robert with deep, fraught pumps. "You would do anything to please your father, wouldn't you?"
Robert's hips canted up as Katon squeezed a third finger in. It popped inside next to the other rough digits, stretching him perfectly. Robert grasped the back of Katon's hair, panting.
"D-Dad-" He whined, leaning back into Katon's burly frame. "It's so much—"
"I know, my son," Katon hushed him. "But you're doing so good… you're almost ready for me."
The moist sounds of Katon's dragging thrusts filled the room, each stroke upsetting Robert's slick and sliding it back into him. Robert gave himself to it, letting the cyclic pleasure overtake his wits, surrendering to the precise nature in which Katon unraveled him.
"You've done very nicely, son." Katon rumbled, and Robert moaned helplessly out those words alone. "But you know I can't let you finish until I've taken you properly." The offworlder punctuated the statement with a gentle kiss to the top of Robert's head.
Katon slipped his fingers out of him, and Robert instantly fell limp against the larger man. He shuddered as he watched Katon drag the wetness from his cunt over the contour of his abs.
"Such a mess, my boy…"
Robert swallowed thickly, flushing furiously as Katon leisurely painted his abdominal muscles in glistening slick. Then, his massive hands drifted down, cupping the undersides of Robert's thighs. A surge of awe swept through Robert as Katon effortlessly lifted his behind off the bed. Katon leaned back against the headboard, letting Robert's weight halfway rest on his upper body.
Robert's breath hitched when he felt Katon's phallus writhe to life, the tip of the appendage worming it's way to his pulsing slit. He bit his bottom lip, thighs twitching as he watched the sleek phallus with blown out pupils.
Katon laid gentle kisses to the top of his head, his voice throaty and firm.
"Beg me to use you. I want to hear you, son."
Robert sobbed as the phallus flickered over his aching clit, arching his back to chase the friction as much as he could.
"D-Dad- please…" Robert whimpered, wanting nothing more than for Katon to sink him down onto his cock. "I-I'm yours…Just want- daddy's…ngh…"
Robert squeezed his eyes shut, ashamed.
"What do you want from your father?" Katon pressed, his phallus stroking incessantly at Robert's exposed little cock. It swirled languidly over the erect nub of flesh, tearing a heady moan from him.
"Please—Hah!—Please fuck me, dad- please…I'm so e-empty—Ahh— n-need you…"
Katon hummed appreciatively, and finally, finally sunk Robert down onto his cock.
The stretch was pure bliss. Robert cried out, his hand flying back to grasp at the back of Katon's hair. The phallus writhed inside of him, bullying it's size into his cunt. Tears pricked at the corner of Robert's eyes. He was so, so full. And Katon's grip on his thighs was so possessive. He adored this feeling. Being entirely resigned to being split open by Katon's thick cock.
"Look down, my son." Katon rumbled, lowering him further. "Look at how good you take your father."
Robert hiccuped and let his gaze drift down, witnessing first hand how obscene Katon's impossibly large cock looked wedged inside his cunt. And Robert, he… he just sucked him in, the squeeze of his sex devouring Katon's length in an absolutely filthy display.
"See how we are joined as one, my son? How we complete each other?"
That tender spot in his chest that his tumultuous childhood left swelled with ardor, red-hot and impassioned.
"I-I see it, dad. We're- ngh- we're perfect…"
Strong hips bucked up into him. The remainder of Katon's massive length sunk into his cunt, punching a wrecked gasp from Robert.
"That's right. We are perfect."
It was all stars and distant galaxies after that. Katon thrusted into him feverishly, emitting these warbling growls of pleasure into Robert's ruffled hair. His sex was so flexible. It wriggled inside of Robert's throbbing hole, plodding with purpose over his delicate sweet spot. He was so deep. Robert thought deliriously that he could feel Katon grinding into his womb.
"Dad! Oh, fuck!"
"Mmm, that's it son. Just give in."
Robert's eyes rolled back as Katon pounded him, drool spilling from under his tongue, past his gritted teeth and down his chin. His hand faltered from Katon's hair to his neck, clasping onto the back of it as he was fucked senseless.
An all too familiar pressure began to bundle up in his bladder. Each thrust had his vision blanking.
"W-Wait!" He gasped, choking on his words as his whole body quivered. "I-I'm gonna- Ngh, Dad—nonono- Ah- Ahh, God!"
His lower spasmed violently. Robert slammed his back into Katon's chest as he sprayed over his cock, a silent cry lodging itself in his overworked throat. For a second, he was convinced he'd gone blind, deaf and mute all at once.
"There you go, my boy. My perfect boy. So good for me." Katon growled, panting above Robert's head. He sounded like a figment of Robert's imagination, far-removed from the material world, a voice nestled in a sacred corner of his mind. "I'm close, son. Do you want all of my love?"
"Y-Yes, yes, yes…give it to me, please. Please, Dad," Robert babbled, his mind disintegrating more and more by the second.
Katon snapped his hips into him a few more times, each thrust underlined with deep, gravelly grunts. Then, Robert was being filled. The phallus inside him pulsated richly, dousing his cunt in Katon's thick seed. There was so much. He felt it fighting for space inside him, felt how it spilled past where Katon's cock kept him plugged. The sensation alone ripped another world-shattering orgasm out of Robert. It wracked through his entire frame, making him feel shapeless, like his flesh wasn't enough to keep him bound to Earth.
The afterglow was a luminous thing burrowed deep in his soul. It had a heartbeat, sonorous and resounding in tandem with Katon's weighty breaths. The room pulsed with each beat, molding into the abstract shape of their united contentment.
The cleanup was a ritual Katon usually took the lead in. He would lay Robert down, kiss his forehead and tell him he'd back soon. He'd disappear into the bathroom, collect what he needed to straighten up. He was forever grateful for Katon's forward thinking, always prepared for their intimacy with a ready towel to cover the sheets in case it got messy—which it often did.
When they laid together that night, the offworlder spooning Robert with the warmest of embraces, he privately delighted in how lucky he was to be in the care of Katon.