The silence that had filled the car for three hundred miles was a physical thing, thick and electric. Katsuki broke camp at their new site with a brutal efficiency, his hands remembering the motions from a thousand trips. But when he folded the tent nylon, his fingers brushed over a seam, and his breath caught. Not a crime scene. The birthplace. The word echoed in his skull as he shoved the bundle into its sack.

Izuku watched him from beside the car, arms wrapped around himself despite the warm evening. His green eyes tracked every movement, wide and waiting.

“This spot’s better,” Katsuki said, his voice gravel from disuse. He nodded toward the lake, its surface glassy in the dusk. “View’s cleaner.”

“It’s pretty,” Izuku murmured. He bit his lip, a nervous habit. “Do you need help with the… the new tent?”

“I got it.”

Katsuki unzipped the bag, the sound loud in the quiet. He could feel Izuku’s stare on his back, on his shoulders as he bent to drive the stakes. It was different now. Not a kid watching his dad. A lover watching. A co-conspirator. The knowledge was a live wire in his gut.

He finished with the rainfly and stood, wiping his hands on his jeans. “Come here.”

Izuku came, stepping over the guylines with that new, careful awareness of his body. He stopped just outside of arm’s reach.

“Closer,” Katsuki said, the command softer than he intended.

Izuku took one step, then another. The fading light caught the freckles across his nose, the uncertain curve of his mouth. Katsuki reached out, not touching his face, but brushing a stray green curl back from his forehead. His thumb lingered at Izuku’s temple, feeling the pulse there, fast and birdlike.

“You scared?” Katsuki asked, his voice low.

Izuku’s eyes flickered. “A little.”

“Of me?”

“No.” The answer was immediate, breathless. “Of… this. Of it stopping.”

Katsuki’s chest tightened. He let his hand slide down, cupping the back of Izuku’s neck. He could feel the fine tremble in the kid’s muscles. “It’s not gonna stop.”

“Promise?”

Instead of answering, Katsuki leaned in and kissed him. It wasn't like the desperate, brutal kisses in the first tent. This was slow. Deliberate. A claiming that felt like a vow. He tasted the mint of Izuku’s toothpaste, felt the soft gasp against his lips. When he pulled back, Izuku’s eyes were dazed, his lips parted.

“I promise,” Katsuki whispered against his lips, the words a hot breath that made Izuku shiver. Then his hands were moving, sliding down from Izuku’s neck to the hem of his t-shirt. He gathered the fabric and began to pull it up.

Izuku stiffened, his hands flying to clutch at Katsuki’s wrists. “D-Dad—what are you—someone could—”

“Look around, kid.” Katsuki didn’t stop. He peeled the shirt up over Izuku’s chest, exposing his pale stomach, the small, soft swell of his tits. The evening air was cool on his skin. “No one’s here.”

“But they could be,” Izuku breathed, his protests dying as the shirt came off completely. He stood there, half-naked in the dusk, his arms coming up to cross over his chest on instinct. His face was flushed with embarrassment, his green eyes wide and darting toward the tree line.

Katsuki’s thumbs hooked into the waistband of Izuku’s shorts. “That’s what’s got you shaking? The chance someone might see?”

“I…” Izuku’s breath hitched as the button came undone. The zipper sounded obscenely loud. “It’s… wrong.”

“We passed wrong five miles back.” Katsuki pushed the shorts and underwear down over Izuku’s hips in one rough motion. They pooled at his feet. Izuku stood completely bare, his body gleaming in the fading light, every freckle visible. Katsuki’s stormy eyes drank him in. “Tell me what you’re really feeling.”

Izuku trembled, but he didn’t cover himself. He looked from the empty camp road back to his father’s intense face. A strange, thrilling heat was uncoiling in his gut, cutting through the fear. “It… excites me,” he whispered, the confession torn from him. “The risk. That someone… that someone could drive up right now and see me like this. See you with me.”

Katsuki went very still. His hands, which had been resting on Izuku’s bare hips, tightened. “Say that again.”

“I want them to see,” Izuku said, louder now, his voice gaining a desperate edge. His hands uncurled from their defensive pose, falling to his sides. “I want them to know I’m yours. I wish… I wish you’d fuck me right out in the open. On the picnic table. Where anyone could see you claiming me.”

A low, rough sound escaped Katsuki’s throat. He crowded Izuku back a step, until his bare shoulders brushed against the cool metal of the car. “You have any idea what you’re saying?”

“Yes.” Izuku’s gaze was fierce now, all hesitation burned away by the fantasy. “I think about it all the time. You, taking me somewhere we shouldn’t. Someone catching us. Them seeing how much I want it. How much I belong to my Daddy.”

Katsuki’s control, that fragile thing, splintered. He crashed his mouth onto Izuku’s, kissing him with a possessive fury that stole the air from both of them. When he broke away, they were both panting. “You’re a goddamn menace,” he growled, but his hands were roaming, mapping the expanse of Izuku’s exposed skin—the dip of his waist, the curve of his ass, the softness of his inner thighs.

“It’s true,” Izuku gasped, arching into the touch. “I want the whole world to know. Make it true, Daddy. Please.”

Katsuki’s hands slid under Izuku’s thighs, lifting him with a grunt of effort. He carried him the few steps to the weathered picnic table and laid him out on the rough-hewn wood, his son’s bare back pressing into the cold surface. Izuku gasped, his green eyes wide on the darkening sky. Katsuki leaned over him, his breath hot against Izuku’s ear. “Keep your eyes on the road,” he whispered, the gravel in his voice gone rough with want. “Watch for anyone pulling up.”

“Daddy—”

“Do it.” Katsuki straightened, his own hands going to his belt. The buckle clinked, loud in the quiet clearing. He shoved his jeans and boxers down just enough to free his cock, already fully hard and leaking. He didn’t give Izuku time to look, to think. He gripped his own length, gave it two rough strokes, and notched himself at Izuku’s entrance, which was already slick and willing. “A park ranger could roll up any minute,” he growled, watching Izuku’s face. “Green truck. Badge on his chest. He’d see everything.”

Then he pushed inside. It was a ruthless, deep thrust, burying himself to the hilt in one motion. The table creaked under them. Izuku cried out, a sharp, punched-out sound that echoed off the trees, his back arching off the wood.

“Shut up,” Katsuki hissed, but he was already moving, pulling out and slamming back in, setting a hard, desperate rhythm. The wet sound of their joining was obscenely loud. “A family of four. Minivan. Mom and dad up front, two kids in the back.” He drove into him, his hips pistoning. “Those kids would see your legs wrapped around me. See your face while you get fucked.”

Izuku’s head thrashed, his fingers scrambling for purchase on the splintered table. “Oh god—”

“They’d see how wet you are for it,” Katsuki grunted, his own control fraying with every thrust. Sweat dripped from his brow onto Izuku’s chest. “See how your cocklet jumps every time I bottom out. Would you come for them, Izuku? Come for the whole goddamn campground?”

“Only for you,” Izuku sobbed, his eyes screwed shut, his body clenching tightly around Katsuki’s length. “Only for you, Daddy, please—”

“Eyes on the road, I said.” Katsuki grabbed his jaw, forcing his head to the side. The camp road was empty, a dark ribbon between the pines. “Look. An influencer couple. Vlogging their nature retreat. They’d point their phone right at us. Record the whole thing. Put it online for millions.” He punctuated each sentence with a deeper, harder thrust, making Izuku’s body jolt. “You’d be famous. The slut who got railed by his old man at Lake…” He trailed off, his rhythm stuttering as his own climax coiled tight in his gut. “Fuck. What’s this lake even called?”

Izuku let out a broken laugh that twisted into a moan. His hips lifted, meeting every drive. “I don’t care. Let them watch.”

Katsuki’s composure shattered. He fell forward, bracing his hands on the table by Izuku’s head, his thrusts becoming ragged, uncoordinated. “You mean it?” he gasped, his face inches from his son’s. “You’d really let the world see this? See what we are?”

“Yes,” Izuku breathed, his green eyes blazing with a truth that was more terrifying than any fantasy. He reached up, his fingers tangling in Katsuki’s spiked hair. “I want them to see I’m yours. That you’re mine. That’s all that matters.”

The plea tore from Izuku’s throat, raw and shattered. “Inside me, Daddy, please—cum in my pussy, I don’t care—breed me, please—”

Katsuki’s hips stuttered. He tried to pull out, a final shred of sanity screaming. “Izuku, no, you could—”

“Put a baby in me, Daddy!” Izuku screamed, his body bowing off the table as his own climax ripped through him. It wasn’t just a come—it was a flood, a hot gush of fluid that soaked Katsuki’s still-clothed lower abdomen, dripping down to mingle with the sweat on their thighs. The scent of it, musky and sweet, filled the air between them.

The feel of his son squirting against him, the desperate, wet heat of him clenching around his cock, obliterated the last of Katsuki’s resistance. With a guttural roar that was part agony, part surrender, he drove deep and held there, pulsing as his own release shot hot and heavy into Izuku’s cunt. He came and came, each thick pulse a violation of every law he’d ever lived by, a claim that went beyond skin.

For a long moment, there was only the sound of their ragged breathing and the distant cry of a bird. Katsuki stayed buried inside him, his forehead dropped to Izuku’s shoulder, his body trembling with the aftershocks. The wet spot on his jeans cooled rapidly in the evening air.

“You stupid, reckless kid,” Katsuki whispered, his voice wrecked. He didn’t move to pull out.

Izuku’s hands came up, stroking through his father’s sweat-damp hair. “You did it.”

“Of course I fucking did it. You screamed for it.” Katsuki finally lifted his head. His stormy eyes were dark, pupils blown wide. He looked down at the mess between them—Izuku’s spend gleaming on his shirt, the slick evidence of his own still leaking from where they were joined. “Look what you did.”

“I know.” Izuku’s voice was quiet, awed. He shifted slightly, making Katsuki hiss as the movement squeezed his softening cock. “It’s… a lot.”

“It’s a disaster.” But Katsuki’s hands were gentle as he finally withdrew, the slow drag making Izuku whimper. He looked at the mix of fluids on his own stomach, then back at Izuku’s well-used, dripping cunt. “You feel that? Inside?”

Izuku nodded, his green eyes huge. “It’s warm. I can… feel it.”

Katsuki swore softly, a helpless sound. He used the edge of his damp t-shirt to wipe roughly at Izuku’s stomach, then at his own jeans, a futile gesture. “We need to clean up. It’s getting cold.”

“In a minute.” Izuku reached for him, his fingers hooking into Katsuki’s belt loops. “Stay here. Just for a minute.”

Katsuki let himself be pulled down until he was half-lying on the table beside his son, their bodies aligned on the rough wood. The sky above was indigo, the first stars piercing through. He turned his head, his nose brushing Izuku’s temple. “You really don’t care, do you? About any of it.”

“I care that you’re here.” Izuku turned to face him. In the deep dusk, his freckles were invisible, making him look older, stranger. “The rest… it feels like a dream. A good one.”

“It’s a nightmare, Izuku.” Katsuki said it flatly. “A beautiful, fucked-up nightmare we can’t wake up from. And now I might have…” He couldn’t say it.

“Given me a baby?” Izuku finished for him, no fear in his voice. Only a terrible, serene curiosity. “Would that be so bad?”

Katsuki pushed himself up on one elbow, staring down at him. “Are you hearing yourself?”

“Yes.” Izuku met his gaze without flinching. “I’m just asking. If it happened. Would you hate it? Hate me?”

The question hung in the cooling air. Katsuki’s jaw worked. He looked from Izuku’s earnest face down the length of his bare body, to the shadowed junction of his thighs where his own seed was likely still leaking out. A possessiveness so profound it felt like madness swept through him. “No,” he breathed, the word a confession more damning than any action. “I wouldn’t hate you. That’s the problem.”

Izuku’s smile was small, triumphant. He leaned up and kissed Katsuki, a soft, slow press of lips that tasted of salt and spent desire. “Then it’s not a nightmare,” he murmured. “It’s our trip. You promised.”

Katsuki broke the kiss, resting his forehead against Izuku’s. He was still wearing his clothes, damp and sticky. His son was naked under the stars, filled with him. The world had narrowed to this picnic table, this sin, this impossible love. “I did promise,” he whispered back. And for the first time, the weight of that vow didn’t feel like a chain. It felt like a new, terrifying gravity, holding them together in orbit as the dark fully settled around them.