Archive of Our Own ^beta

It had started with a joke, a long time ago. "You don't think Kryptonian guys can get other guys pregnant, do you?"

Only, it was a joke that seemed to light the fire in Clark's eyes, and Lex sure loved to stoke that fire.

They had just come from a gala in Metropolis, Clark looking beautiful on Lex's arm. He liked showing off his perfect farmboy, being the envy of everybody, he was sure. But at a certain point he needed to drag him away from all the prying eyes, to keep him all to himself.

That's how they ended up in the back of Lex's Ferrari, Clark straddling his waist—and yes, Clark Kent is the only man who would ever be afforded the privilege of sex in one of Lex Luthor's cars.

"Imagine making a baby in the back of a Ferrari?" Lex offered, eyes dark and heavy already. "It'd be a hell of a story to tell the kid. Not to mention the way anybody could walk in here..."

Clark growled, rolling his hips. Lex could feel his hardness against his stomach, Clark's dress pants straining against his size.

"Lex," Clark breathed, voice thick. "You're obsessed with this."

Lex's fingers dug into Clark's hips, pressing bruises that would vanish in seconds. "Have you ever known me to obsess over anything?" He laughed low, grinding up against Clark's thigh. "Imagine it. A little heir. Half-Kryptonian, half-Luthor. Power incarnate." He slid a hand between them, palming Clark through the expensive fabric. "Your strength. My ambition. Breeding me right here where anyone could see the way I open up for you."

Clark shuddered, a choked sound escaping him as Lex's thumb rubbed slow circles over the straining bulge. "You're insane," he gasped, but his hips jerked forward, seeking friction. "This car costs more than my parents' farm."

"And you're worth wrecking every single one," Lex purred, his other hand sliding up to fist in Clark's dark hair, pulling his head back to expose the vulnerable line of his throat. Lex bit down, hard, knowing the mark wouldn't last but savoring the sharp intake of Clark's breath, the tremor that ran through the powerful body pinning him against the leather seat. "Think about it, Clark. Your seed taking root inside me. Filling me up until I'm dripping with it." His voice dropped to a rough whisper against the damp skin beneath Clark's jaw. "Making me swell with something alive. Something ours."

Clark groaned, a deep, guttural sound that vibrated against Lex's chest. His hips snapped forward again, grinding against Lex's thigh with desperate urgency. The expensive fabric of his trousers was damp now. "You want that?" Clark rasped, his voice thick with arousal and something else—a dangerous edge Lex had carefully cultivated. "Want me to knock you up right here? In this filthy, public parking garage?" His hand covered Lex's where it still pressed against his cock, forcing the pressure harder. "Want everyone to see Lex Luthor bred like an animal?"

"Yes," Lex hissed, tilting his head back against the car door, baring his throat again in deliberate submission. "Show them. Show them who owns me." He dragged Clark's hand lower, past his own straining erection, to the waistband of his tailored pants. "Show me."

Clark’s fingers hooked into the expensive fabric, tearing Lex's pants down in one fell swoop. Lex gasped as cool air hit his exposed skin, followed immediately by the searing heat of Clark’s palm sliding beneath his briefs, cupping him possessively. "Right here?" Clark growled, his breath hot against Lex's ear. "Where anyone walking to their Prius could see Lex Luthor getting stuffed full of alien cock?"

Lex’s laugh was ragged, choked off as Clark’s fingers dug into the soft flesh of his inner thigh, spreading him wide. "Yes," he managed, arching his back against the leather seat. The scent of expensive cologne mingled with sweat and the musk of arousal, thick and heady in the confined space. He could hear footsteps echoing somewhere distant in the concrete cavern of the garage—a janitor maybe, or some late-night executive. The thrill of exposure sent a jolt straight to his core. "Let them see," Lex breathed, locking eyes with Clark. "Let them know exactly whose seed I’m taking."

Clark didn’t hesitate any longer. His grip tightened, lifting Lex’s hips effortlessly as he shoved his own pants down just enough. He tore Lex's underwear off and—sure, he didn't need it anyway. The first press of him against Lex’s entrance was electric, blunt and demanding. Clark spit in his hand and Lex gasped, nails scraping against the Ferrari’s upholstery. "Look at you," Clark murmured, voice rough as gravel. "Already wet for it. Begging to be bred."

He pushed in slowly, relentlessly, stretching Lex open with a burn that bordered on pain—pain Lex craved. "Gonna pump you so full, Lex. Fill you till it takes."

Lex gasped. The footsteps grew louder—closer—somewhere between rows of parked cars. "Do it," Lex demanded, voice ragged. "Mark me. Claim me." He wrapped his legs around Clark’s waist, heels digging into the small of his back, forcing him deeper. The leather seat creaked under their combined weight, the scent of sex thick enough to taste.

Clark’s mouth crashed down on his—a brutal, claiming kiss that stole Lex’s breath. Teeth scraped lips. Tongue plunged deep, tasting every bit of him. Lex moaned into it, surrendering, fingers tangling in dark curls. Clark’s thrusts began—slow, deliberate, each one punching the air from Lex’s lungs.

"Can't believe you were scared to tell me," Lex breathed. "All that time... could'a told you how fucking hot it is." Clark froze mid-thrust, pupils blown wide. Lex arched beneath him, dragging blunt nails down the sweat-slicked plane of Clark's back through his shirt. "Knowing you're not from here. That you fell from the stars." He bucked his hips, forcing Clark deeper. "That I'm the only one who gets to feel this." The next thrust punched a ragged groan from Lex's throat. "Alien cock splitting me open."

Clark's hips snapped forward, burying himself to the hilt. The Ferrari rocked violently on its suspension and Lex couldn't bring himself to care. Every nerve ending screamed as Clark's cock dragged against that spot inside him—the one that made stars explode behind his eyelids.

"Lex, you're—" Clark choked out, hips pistoning faster, harder. "God. So hot. Need to—fill you up."

Lex gasped, the friction burning sweetly. "Yes. Do it. Breed me." The footsteps were distinct now—sharp clicks of heels, maybe twenty yards away. Lex moaned louder, deliberately. "Let them hear. Let them know."

Clark slammed into him, each thrust jarring Lex's spine against the door panel. The rhythm turned frantic, desperate. Lex clawed at Clark's shoulders, dragging him closer, deeper. "Harder," he rasped, biting Clark's collarbone. "Give it to me. All of it."

Clark shuddered violently, rhythm faltering as he shook. "Lex—gonna—need to—"

"Inside," Lex gasped, nails digging crescent moons into Clark's shoulders. "Fill me deep." The footsteps echoed off concrete pillars—close enough now to hear the jingle of keys. Lex locked eyes with Clark. "Mark me yours. Now."

Clark buried his head in Lex's neck as he bucked into him, shallow thrusts that never even made it halfway out. His low moan was music as he buried himself in to the hilt. Lex felt that first hot pulse inside him, his own eyes rolling backwards in his head. Clark groaned louder, hips jerking uncontrollably as he pumped Lex full. Lex clung to him, fingers digging into sweat-slick skin, whispering filth against his ear. "Yes, Clark. Give it to me. Breed me. Fucking knock me up with your alien offspring."

Clark shuddered violently, emptying himself deep inside Lex with a guttural cry. Lex gasped at the sensation—the heat flooding him, thick and claiming. He felt impossibly full, stretched wide around Clark’s cock, the alien seed pulsing deep inside him. He arched into Clark, grinding down to milk every last drop.

Lex’s own climax hit him like a spaceship falling from the sky. His cock strained against Clark’s abdomen, trapped between them. He cried out, hips jerking uncontrollably as he painted both their torsos in thick ropes of come. He would have to tip the drycleaners extra. Clark’s name tore from his throat—a raw, guttural sound that echoed off the Ferrari’s leather interior.

Clark panted heavily as he lifted Lex effortlessly, softening cock never leaving him. He shifted their positions so Clark was leaning against the passenger side door and Lex was resting on top of him. He pressed a kiss to the side of Lex's head.

"You... do things to me, Lex," Clark said, suddenly shy. After that display.

Lex laughed, low and raspy. "Yeah?" He traced a lazy finger through the mess on Clark's shirt. "You do things to me, too."

"Too hot to imagine you all big and full. Full of—of me."

"Our children would be the most powerful beings on Earth," Lex murmured, tracing the curve of Clark's jawline with his other hand.

"And the cutest. Imagining them running around the farm... little boys and girls. Lex Luthor's genes too good to waste. Need to keep knocking you up... over and over."

Lex shivered. It was an intoxicating thought.

Clark's eyes opened wide. "What if they're all bald?"

Lex smacked him and he grinned. "It builds character," Lex said. "Besides, you love it."

Clark laughed softly, wrapping his arms tighter around Lex. The garage was silent now except for their breathing and the distant hum of city life filtering down. He knew it was far from actually public—the worst case scenario was some unlucky—lucky? valet stumbled on them and they were paid too much to care. Lex shifted slightly, wincing at the sticky mess between them—Clark’s release leaking onto his thigh, mingling with his own spend smeared across Clark’s abs. The Ferrari’s leather upholstery would need professional detailing. Worth every penny.

"We'll keep trying until something sticks," Lex said. "Scientific innovation requires testing. A lot of it. Repeatedly. Thoroughly."

Clark's exhale tingled across his skin. "Yeah, alright. I submit myself to your study. Think we should get going on those continuing trials... time is money, right?"

Lex grinned. "You're learning."