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Father-In-Law Bonding

Summary:

Red Son wants to make MK his, officially. DBK suggests a time-honored tradition.

Or: MK (sort of) agrees to let DBK fuck him. Red Son is there for moral support.

Notes:

Request idea I liked enough to actually do.

(See the end of the work for more notes.)

Work Text:

“Come on, Noodle Boy, it’ll be fine.” 

Red Son patted the space in front of his crossed legs. MK took a deep breath to steady himself. He climbed onto the bed and sat in front of his boyfriend. He leaned back, laying his head on the demon's lap. He clasped his hands over his stomach, partially because he had no idea what to do with them, and partially to stop them from shaking.

When Red Son first suggested this, MK had been too shocked to respond. Then he’d flat out refused. But the more his boyfriend had talked about it, the more MK felt obliged to do it. 

Apparently, it was demonic tradition to have their partners “tested” by their parents before a relationship got serious. The fact that Red Son had even brought this up meant he was serious about MK, and he wanted to make it official. MK was serious about their relationship too. He wanted to show his boyfriend that he meant it. But when he’d asked if there was anything other than “bonding” he could do, Red Son insisted that this was the only demonic tradition that would take their relationship to the next level.

He had promised it wouldn’t be too bad. MK was equally shocked to hear that Red Son had been with his father before for other demonic bonding activities. His boyfriend had said it so casually though, that MK began to wonder if it really wasn’t a huge deal to demons. Red Son explained that although the Demon Bull King could get excited, he wouldn’t leave MK with any lasting damage. 

When MK had tentatively agreed, the look in Red Son’s eyes had nearly melted his heart. He’d grabbed MK and spun him around, squeezing him and making excited whooping noises. MK was too enchanted by his boyfriend's excitement to take it back.

He supposed it wasn’t unusual for people to take part in cultural practices they didn’t fully understand for their partner's sake. And he didn’t want Red Son to feel rejected. He wanted to prove how seriously he took their relationship. 

Still, he was scared.

“Hah. This still feels so, uh, weird.” MK rambled. “I mean- not that demon customs are weird or anything! It’s just, uh, weird to me. Cause I’m, uh, a human.” MK lifted a hand to cover his eyes. “Fuck, sorry.

Red Son stared down at him, eyes crinkled with a soft apologetic smile. “It’s alright, I’ll be here. I appreciate you’re willing to go through with this.” He leaned down and kissed MK, then pulled back and ruffled his hair.

MK blinked. Heat rose to his cheeks. He basked in the attention and adoration Red Son was showing him, soaking it in before reality could catch up to him.

“Ah, little thief.” MK jumped at the familiar, gruff voice. “I didn’t think you’d have the guts.”

Red Son let out an indignant huff. “Of course he does! I told you he’d be here, didn’t I, father?”

“So you did.” The Demon Bull King closed the door behind himself. 

MK resisted the urge to sit up as DBK stalked towards them. He didn’t like feeling so vulnerable around Red Son’s father. But he knew he had to swallow that fear down, since he was about to become a whole lot more vulnerable. The bed dipped and rocked as the Demon Bull King climbed onto it and positioned himself between MK’s legs. He placed a hand on MK’s thigh and smirked when the younger man flinched. 

“Having doubts?” He teased. MK frowned and shook his head. Even if he was, he wouldn’t say anything. It wasn’t like he could leave at this point. He was in way too deep.

The Demon Bull King didn’t even give him a heads up before practically ripping his pants off. MK jolted and let out a frankly embarrassing squeak of surprise. His dick twitched at the sudden draft of cold air. Red Son started petting his head, and the reassurance made MK force himself to relax. Even if his heart was still racing. 

Even if the pit of dread in his stomach was making him nauseous. 

DBK wrenched MK’s legs apart. His cock was already hard and jutted out from beneath his loincloth. He moved to line himself up with the tiny human beneath him. MK’s eyes widened and he almost shouted in alarm, but Red Son got there before him.

“Father! He needs to be prepared first.” Red Son held out a hand and conjured a bottle of lube from a spiral of flame. MK almost laughed, his nerves fraught. It was just such a silly use of Red Son’s powers. DBK rolled his eyes.

Humans. ” He growled, snatching the container with annoyance. 

He poured a generous amount of the substance on his fingers and unceremoniously set to work fingering MK’s asshole. It was uncomfortable, bordering on painful. DBK’s fingers were too big, and stretched him just a bit too carelessly. MK tried to keep in the gasps and hisses of pain the Demon Bull King elicited from him. He squeezed his eyes shut and focused on his boyfriend's comforting words.

“Good job.” Red Son murmured. “You’re doing good so far.”

MK whimpered. The encouragement was nice.

His breath hitched as he felt the fingers leave him. A moment later, a splitting pain shot through him. He hadn’t been ready for DBK to enter him so soon, he hadn’t been stretched nearly enough for the demon's huge cock. He thrashed, instinctively trying to wrench himself away, but Red Son gripped his shoulders and held him down.

“MK! MK, calm down, you’ll be fine!” 

MK shook his head, tears pricking at his eyes. His hands clutched desperately at the sheets. The Demon Bull King pulled out slowly, MK grit his teeth and almost relaxed in relief. Then the demon grabbed his hips and slammed back into him, sending bolts of paint through his legs and abdomen. He screamed.

“Father! Please slow down!” MK heard Red Son above him, begging on his behalf. DBK growled, giving another brutal thrust that left MK shaking. 

“No son of mine will be mated to a weak mortal. He’ll take it, or you’ll never see each other again.”

Red Son looked from his dad to his boyfriend, eyes wide with desperation. To MK’s dismay, he didn’t argue. He felt that pit in his stomach well, the betrayal finally pushing the tears from his eyes.

The Demon Bull King gripped his hips roughly, digging his claws in and he fell into a punishing pace. MK desperately wanted to push the demon away, he wanted to summon his staff and beat DBK off of him. But then he would look up and see Red Son’s concerned eyes. He knew he had to get through this, but gods, the pain that tore through him with each thrust was unbearable.

“It- augh! It hurts!” MK choked the words out between sobs.

“Shh, hush, I know it hurts, I know.” Red Son kept shushing MK, petting his hair in a feeble attempt to comfort him. “Good, good. You’re doing good, MK, you’re doing way better than I did my first time.”

The Demon Bull King fucked MK hard enough that his head bumped against Red Son’s stomach with every thrust. He hadn’t ever felt this helpless before. Even when he’d been beaten in a fight, at least he’d been able to try. Now he couldn’t even defend himself, he just had to lie there and take it. He sobbed into Red Son’s lap, overwhelmed by how disgustingly full he felt, otherwise he’d be putting his relationship in jeopardy. His cock twitched and leaked pathetically on his stomach, his body aroused despite the stinging, throbbing pain.

Red Son leaned down and kissed MK’s cheek, he continued trailing gentle smooches over his partner's forehead, then down to his neck and shoulders.

“It’s ok, I’ve got you, you’re ok.” Red Son whispered. MK tried to thank him, but all that came out were desperate mewls and sobs. He could barely see through the tears that blurred his vision.

“Father, can I try something?” Red Son said, raising his head to address his dad.

“Do whatever you like, so long as you don’t get in the way.” DBK grunted, not stalling his brutal pace.

MK felt Red Son shift away from him, then his head hit the soft bed beneath him. The loss of his only comfort made a new wave of panic overtake him, and he flung an arm out wildly in an attempt to find his boyfriend.

“MK, relax!” Red Son assured him. “I’m right here! I’ll be right back, just give me a second, ok darling? Can you do that for me?”

MK tried to shake his head, though he wasn’t sure if that was clear since his entire body was shaking and spasming at that point. He didn’t want to be left alone, stretched and stuffed so full he thought he might burst. 

Red Son couldn’t have been gone longer than thirty seconds, but it felt like hours, being left alone with only DBK’s clawing grip and violent thrusts to keep him company. Now that he no longer had his boyfriend to distract him, he became painfully aware of a suspicious wetness between his legs. It didn’t feel like the lube, but he was too afraid to look. He had a sick suspicion he knew what he would find if he did. 

When Red Son finally reappeared, it was by his side. With one hand he cupped MK’s face, with the other he gripped MK’s dick and began gently stroking it.

“Good boy.” The affection in Red Son’s voice sent a wave of pleasure through MK. It distracted him for a moment. “You did very well. You waited for me so patiently. ”  

MK sniffled, leaning into the hand holding his face. He heard DBK snort derisively, but both of the younger men ignored him.

“How about I give you a treat, MK, how does that sound?” Red Son purred. MK nodded. He had no idea what his boyfriend had in mind, but he trusted him. Hopefully, whatever he was about to do would lessen the pain wracking his body. 

MK tried to focus on Red Son’s hand. The spikes of pleasure that attempted to cut through the pain as his boyfriend sped up and rubbed the head of his dick. It wasn’t nearly enough, but MK appreciated it regardless. 

Then the hands disappeared, both from his face and his cock. MK fought down another bout of panic, but it quickly subsided when he felt something hot and wet position itself over his dick. MK let out a chorus of moans and grateful whines as his boyfriend lowered his warm cunt onto him. A comfortable weight settled over him as Red Son bottomed out. 

“You’re so brave, MK. You’re my brave little boy.” Red Son cooed, rocking himself back and forth experimentally. He leaned over and kissed MK, desperate and affectionate. He kept riding MK. “It hurts, but you’re taking it perfectly. You’re so strong, so much stronger than I’d be. Thank you, thank you for doing this, MK.”

MK smiled, though he couldn’t see his boyfriend through his tears, he was happy Red Son was proud of him. He brought a shaking hand up to the fire demon's face, stroking his cheek lightly, before they smashed their lips together again. MK couldn’t exactly thrust into his boyfriend, since his hips were being held in place by DBK, but he didn’t need to. Red Son was all too happy to bounce on his cock. MK moaned, the tight heat of Red Son’s cunt was heavenly. 

“You’re doing amazing, you’re doing so good.” Red Son sighed. It was a contented, breathy sound that plucked at MK’s heart. He was glad his boyfriend was enjoying himself. But the sharp pain hadn’t gone away. In fact, DBK seemed to have started fucking him even harder now that Red Son was on top of him. He didn’t know whether to cry or moan. His insides felt as though they were being torn to shreds with every painful drag of the Demon Bull King's cock, but Red Son was riding him with determination.

MK was dizzy from overstimulation. Every nerve in his body told him to scream and kick and fight, but he couldn’t. He couldn’t do that to Red Son. So he lay there, exhausted and limp. Except for his arms, which were clamped around Red Son’s neck. 

The Demon Bull King yanked them both back, the sudden movement making Red Son yelp. He glared back at his father, but DBK just laughed. The fire demon recovered, and thrust himself back onto MK’s cock with an adorable moan.

Red Son leaned back down, forcing a kiss onto MK’s drooling mouth. MK could barely reciprocate, caught in a storm of pleasure and pain, but that didn’t seem to matter to his boyfriend. Red Son just kept going, kissing and licking and biting every inch of MK he could get his mouth on.

The Demon Bull King didn’t give MK a moment of peace either, pounding his abused ass as if Red Son weren’t even there. The two of them together fucked MK mercilessly. 

Distantly, MK thought this whole situation was a bit funny. Of course they were merciless, they were demons after all.

DBK’s thrusts began to speed up, with an edge of desperation. He grabbed MK’s legs and yanked him onto his cock as far as he could, tearing a scream from MK’s throat. The Demon Bull King ignored the boy's sobs, his cock throbbing inside the human's tight ass. MK’s head filled with static as DBK shot his load into him. He would never admit it, but the feeling wasn’t terrible. He liked being filled, liked the way cum was beginning to drip from his ass. 

For his part, Red Son didn’t let the situation stop him from fucking himself on MK’s dick. He growled, biting at MK’s shoulder and nipping at the human's neck. Now that DBK had stopped moving, MK could focus on his boyfriend. 

Red Son’s gorgeous hair fell down his shoulders. His skin shined with sweat, no doubt he was exerting himself in this position. Still, the way he was looking at MK caused the human to flush. How could someone so handsome look at him like he was the greatest treasure in the world?

“MK, ahh, MK!” Red Son whimpered his name, a desperate plea that made pleasure pool in MK’s stomach and spread through his body. “I’ve been good, right? Right? Please say I’ve been good, please, I j-just wanna make you feel nice.”

“Y-you’re good.” MK slurred. Frankly it was amazing he could even say those two words. But the glimmer of excitement in Red Son’s eyes after he’d said them was worth it.

“Ah- MK! Please- please, come in me.” Red Son panted, riding his boyfriend with a borderline delirious need. “You deserve it, MK, c’mon, you -ah, ahh- you’ve been so good too. Please- please breed me. ” 

MK buried his face in Red Son’s neck. He let himself go. A wave of bliss crashed down on him. Not even the sickening fullness of DBK’s cock inside of him could break through his ecstasy. He moaned, holding Red Son as close to him as his shaking arms would allow. He felt himself filling the fire demon, his cum spurting and leaking from the demon's cunt. 

“Thank you! Ah, ah ahhh- MK- thank you. Thank you thank you thankyouthankyou-” Red Son devolved into incoherent babbling. He arched his spine, pushing back against MK’s cock until there was nothing more to take, and he was pressed firmly against his boyfriend's balls.

Then the Demon Bull King pulled out. MK gasped at the sudden gaping emptiness. As much as he’d hated the intrusion, being without it made his stomach twist in knots. He was now painfully aware of how his body had rearranged itself around the huge demon's cock.

“Wukong was right to choose you. You are strong.” DBK huffed, a cruel smile playing on his lips when he added, “For a mortal.”

MK barely had the sense of mind to feel offended. He didn’t bother watching the Demon Bull King leave. He focused his attention on Red Son, who held him close and murmured comforting words. He lifted MK off the bed, bringing him to the adjoining bathroom, and gently stripped MK of his remaining clothes. He helped him into the bathtub. It was a huge, luxurious thing, made in the style of the rest of the Demon Bull Family’s stronghold. 

He stared blankly at the pool of red between his legs. It wasn’t anything too bad, just a little bit of blood. Still, he was transfixed by it. Red Son turned on the faucet and MK watched the spots of red slowly dissipate, diluted by the warm rushing water that soon came up to his knees. 

“Are you alright?” Red Son asked. 

It was the first thing he’d said, outside of muttered praise. MK blinked, turning his head to really look at his boyfriend. Red Son was naked, having pulled off his sweat-soaked shirt and abandoned his pants long ago. He sat on a stool near the side of the bathtub. 

MK gave a shaky nod.

“Can I join you, or would you prefer to be alone?” Red Son asked this so casually, it made MK want to giggle hysterically. Instead, he just turned back to the bath, eyes fixed on his knees. 

“You can join me.” He said. Red Son seemed relieved. He stepped into the tub and positioned himself behind his boyfriend.

“Can I wash your hair?” The demon asked, voice gentle and quiet. MK nodded again.

He ignored the frantic beating of his heart. He ignored the sting between his legs, and the ache in his abdomen that he knew he’d be feeling for days. He ignored the bitter, angry voice that whispered horrible things about Red Son.

For now, he was just going to enjoy a relaxing bath with his boyfriend. He closed his eyes and leaned back, letting Red Son scrub soap into his hair.

Notes:

sorry if this one is bad. I've been goin through it and haven’t eaten anything but pizza and a couple sandwiches in like, 4 days. So uhhh writing aint exactly easy right now.

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