Spoil Him Rotten

This is the Term 9b fic! As y'all might remember, I asked for requests and the winning idea was 'Alpha Katsuki fucking his Omega Momma, Izuku'! as requested by one of our patrons! <3 

As there was requested to be a yandere thing going on, I did try to go for that so I hope there was enough of that flavor going on! Warnings: incest, noncon/dubcon, ABO

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His knuckles were turning white from clinging so tightly to the edge of the counter. The kitchen swum dizzily around him, becoming an inconsequential blur of bright colors that bled together. Blood roared in his head, becoming a dull hum that reminded him of what he heard when he pressed a seashell to his ear. Intense, feverish heat drenched his violently quaking body. Despite the cool breeze blowing in from the open window nearby, he was covered in sweat. His clothes clung uncomfortably to his overly sensitive skin. The slightest shift of the fabric rubbing against him sent out a shockwaves of tingles. Slick dribbled down the interior of his trembling thighs. Within a few seconds of realizing what was doing on, he was sopping wet. He could feel the thick fluid soaking through the seat of his pants. The tip of his rigid, aching cock strained up against the zipper of his jeans. Cold dread pulsed in the center of his chest but it was not nearly strong enough to overwhelm the heat boiling away in the pit of his belly.

Harsh pants tumbled out of his parted, wet lips. Izuku stared down at the counter, using all of the strength he had left in his body to remain upright. What…what was this…? Why was he-? His heat…it didn’t start for another week so why was he suddenly-?! This was bad…this was really, really bad. Izuku’s hazy gaze, partially blurred by tears, flickered up to briefly look at Katsuki, sitting opposite him, before quickly moving away. If Katsuki realized what was going on, he showed no indication of it. His bright red eyes stared at him, emotionless. He didn’t move a muscle as Izuku forced himself to straighten up. Just that one little motion threatened to send him tumbling to the floor. Fuck…he couldn’t remember the last time he had had a heat this intense. Not even his first time had gotten anywhere close to being this strong. What was wrong with him? No…no, that didn’t matter. He would figure out what was going on later. Right now, he needed to get away from Katsuki. Being around his Alpha son while experiencing a heat this pronounced could spell disaster, even for Katsuki, who showed exemplary self-control, even during his ruts.

Sucking in a deep breath, Izuku very slowly turned. It would be a nightmare to get himself upstairs to his bedroom so the next best thing was the guest room on the ground floor. He began to inch forward, doing his best to ignore Katsuki’s stare burning into the side of his head. Why wasn’t he saying anything? Or trying to help him? No, those were stupid questions to ask. Katsuki was a smart kid – he had to know what was going on. Right now, he was definitely trying to minimize his exposure to him, as well as Izuku’s embarrassment. Suddenly going into heat like that, and right in front of his Alpha son…it was humiliating. Did Katsuki think it was because of him? A lump rose up to the back of his throat. God, that was a conversation he never wanted to have. Izuku reached the end of the counter, leaving him with nothing to hold onto. He pushed away those distracting thoughts, allowing himself to entirely focus on the next step. Pressing his lips tightly together, he hesitantly released the counter and stepped forward.

His legs immediately went out from underneath him. He sagged to the floor, landing hard on his knees. The impact sent a pained jolt racing through his body. Biting back a cry, stubbornly blinking back the tears that burned at the corners of his eyes, Izuku placed his hands on the cool tiled floor. Gathering up all of his strength, he started the difficult task of getting back up onto his feet, only to freeze when a shadow loomed over him. He looked up, his heart leaping into his throat when his gaze met those beautiful bright red eyes. Katsuki stood in front of him, still looking at him with that strange unreadable stare. To Izuku’s horrified shame, his cock twitched inside his jeans. A fresh burst of heat rolled out from his crotch, sailing throughout the rest of his body in an avalanche of tingles. His loose clothes suddenly felt unbearably restrictive, like he was swaddled in burlap. No matter how much air he pulled in, it was like he couldn’t get enough. His head spun out of control. His body was so hot…he couldn’t stand it! He…he needed to get away before this got any worse!

“Katsuki, baby.” Izuku panted shallowly, “I need you to go back to your room, okay? Everything is okay. I just-“

“It worked faster than I expected.” Katsuki quietly interrupted him, his low voice surprisingly calm and somber.

Slowly kneeling down in front of him, Katsuki curled a finger under his jaw, tilting his head just a little bit further. The sensation of his warm, calloused skin against his own sent a burst of electric pleasure sizzling down his spine. Izuku gasped softly. He found himself unconsciously leaning into Katsuki’s touch before he could stop himself. Fuck…this was bad…this was so seriously bad. Swallowing down a mouthful of drool, Izuku forced himself to jerk away. A spark of rage ignited in Katsuki’s bright red eyes. His mouth twisted into a furious snarl.

Grabbing hold of his jaw, Katsuki wrenched him back, lunging forward to smash their lips together in a rough, clumsily kiss. A hot tongue, tasting of the coffee they’d just been drinking, shoved its way into his mouth, swiping over the roof, the sides, everywhere it could reach. Izuku froze up, the thoughts crashing through his mind coming to a screeching halt. K…kiss…Katsuki…his own son was kissing him…why…why did it feel so…good? Katsuki’s lips were so smooth…so warm…he obviously didn’t know what he was doing but he was being so rough, so possessive…it was making his head spin. The tension started to steadily bleed out of Izuku’s body. His eyes fluttered shut. One of Katsuki’s muscular arms slung around his waist, drawing him in even closer. Their chests pressed flush together. He…he could feel how hard Katsuki’s heart was beating. His larger, muscular body was so hot…he…he smelled so good…His cock throbbed, desperate and hungry for one of those big hands holding him close to touch him already.

Izuku’s eyes bulged. No…no, he couldn’t think that! He couldn’t feel that! This…this was his son! It didn’t matter that he was an Omega, desperate for an Alpha in his heat! He couldn’t allow this to happen! This…it needed to stop now! Katsuki was clearly being overwhelmed by his scent! No matter what he had to do, he needed to stop this! Using what was left of his strength, despising (not for the first time) his weakness for Alphas, Izuku wrenched his head back, breaking the kiss, gasping out, “Ka-! St-!”

“You can’t resist me. You’ll never be able to, Momma.” Katsuki growled, his blunt fingernails digging into Izuku’s cheeks. Hot breath brushed over his face. Those bright red eyes, blazing with lust and anger, held him captive. Izuku’s heart fluttered wildly inside his chest, slamming hard against the interior of his ribs. He could feel each beat reverberating throughout his torso. Struggling to drag breath into his spasming lungs, Izuku weakly pressed his hands to Katsuki’s chest.  Bad…this was bad…it was so hard to think with Katsuki looking at him like that. He needed to run…he needed to…Katsuki’s lips brushed against his scorched cheek, trailing a line down to the line of his jaw. Gasping raggedly, a pulse of heat tearing through him, Izuku tried so hard to push Katsuki away but it…it felt so good…it was just the simplest of kiss, yet his body was reacting as though his most intimate areas were being fondled.

“Katsuki, stop…” Izuku whimpered, “Please, you don’t know-“

Snarling, Katsuki abruptly yanked away. For a split moment, Izuku was foolish enough to think that he had finally talked some sense into his headstrong son. Just as he was starting to say something to comfort the obviously infuriated Katsuki, a powerful hand slammed down into the center of his chest, sending him tumbling back onto the kitchen floor. A sharp yelp rippled out of his throat as Katsuki roughly rolled him over onto his belly. His cheek squished against the tiled floor. Hot, sweaty hands grabbed hold of his hips, wrenching them up into the air. Frantically squeaking and squirming, Izuku reached behind him to try to stop Katsuki but there was nothing he could do. There wasn’t any strength left in his body! It didn’t matter that this was his son! He wanted an Alpha! Any Alpha! He wanted to be fucked! Impregnated! He…he couldn’t think straight! Tears streaked down his blistering hot cheeks, leaving glistening trails against the vibrant red. Grabbing the hem, Katsuki wrenched his soiled jeans down, exposing his slick soaked ass. Izuku whimpered, curling his hands into loose fists. He…he didn’t want this-! He didn’t want to be fucked by his own son!

Rough hands palmed at the plush globes of his ass, spreading him open wide. Izuku shuddered hard, all the breath rushing out of his lungs in a wheezing pant. Drool leaked out of the corner of his mouth, creating a small puddle underneath his cheek. A shriek of devastatingly strong excitement rippled through him, momentarily shoving back at the dread of what was transpiring. His ass…Katsuki was touching his ass! He was looking at his hole! This…this couldn’t be happening-! Move-! He needed to move-! As soon as his heat wore off, they were both going to regret this-! He…he couldn’t ruin his son’s life by allowing him to fuck his own Mother! He had too…he needed too-! Izuku was so busy distracted by his own rushing thoughts and growing panic that he nearly missed the sound of Katsuki undoing his zipper. Clothes rustled behind him. Katsuki sighed softly, shuffling forward to press flush against him. Something very big, very hot and very hard pressed to his slick drenched entrance. Izuku gasped, a jagged cough of a sound. No…no, no, no-! Izuku twisted around, sobbing softly.

He didn’t want this…no matter how his body was reacting, he didn’t…he didn’t want it-! He didn’t want his son’s cock-! He didn’t want to be fucked by him-! Izuku looked up at Katsuki pleadingly but one look into that brightly flushed face, heavily laced with a demanding desire, was enough to tell him that there was no stopping this. He was too overwhelmed by his heat, and Katsuki…he was just a child…there was no way he could deny his instincts when he was faced with an Omega in a state like this. That didn’t stop Izuku from trying one last time to take control of the situation. He curled his trembling fingers into Katsuki’s jeans, tugging lightly.

“Katsuki, please…” He whispered, “Don’t do this. You don’t want to do this. There’s going to be other Omegas, okay? I know that right now…everything is telling you to bite, to impregnate but you…you gotta stop. You don’t really want this. You don’t-“

“I’ve always wanted this.” Katsuki murmured, sliding one large hand along the length of Izuku’s back. He leaned down, kissing the nape of his neck, “Ever since I knew the difference between Alphas and Omega, I’ve wanted you. I wanted you to be my Omega. I’ve wanted to bite you, to fuck you…that’s why I put an aphrodisiac in your coffee. It forces Omegas to go into heat – no matter when their natural heat is supposed to occur.”

“Wha…what…? Katsuki…why…?”

“I just said it, didn’t I?” Katsuki said annoyed, “You’re mine. I won’t let any other Alpha have you. I’ve seen the way all the single Alphas look at you when you come to school or go to the store…like they want to eat you. I won’t let that happen. You’re mine…you’re mine!”

“Kat-SSKKKKKIIII!!!! AAAHNNNN!!!”

Viciously ramming his hips forward, Katsuki drove a shockingly thick, fat length inside of him. His hole spread open with ease, greedily gobbling up Katsuki’s length. A white hot, bursting, immense wave of pleasure crashed over him. All of his doubts, his shame, his horror was destroyed in that one smash of Katsuki’s hips against his ass. Every muscle in his body tensed up. His toes curled tightly. Tongue hanging out of his mouth, eyes rolled back in his head, Izuku squealed at the top of his lungs as he came, spraying the inside of his underwear in a heavy load of cum. GOOD!! GOOOOOODDD!!! IT FELT SO GOOD-! KATSUKI’S COCK-! IT FELT SO GOOD-! So big-! So hot-! He couldn’t-! Choking out a strangled groan, Katsuki began to roughly buck his hips, repeatedly thrusting his big thing deep inside him. Loud, wet slaps of their sweat bodies colliding filled up the kitchen but that noise was mostly drowned out by the shameless, lewd howls, squeals and sobs pouring out of Izuku. Dense, golden fog clung to his muddled mind. There was no longer any thoughts of stopping this, how despicable it was to be bred by his own child…all he could think about was the cock buried deep inside his pussy.

“M-Momma…” Katsuki gasped, wrapping his muscular arms tightly around Izuku’s violently trembling frame, squeezing them even closer together, “Feels so good…you feel so good inside-! Do you feel good too? Momma, does my cock feel good? Huh? Momma…tell me…”

“F-Feels good-!” Izuku choked out, using what little leverage he had to slam back against Katsuki, driving his cock in even deeper, “Feels so good, Katsukiiiii!!! Your cock feels so good-!!!”

Giggling drunkenly, Katsuki took hold of his shoulder, yanking him over onto his back. His brightly flushed, handsome face swum in his tear blurred vision. Those gorgeous red eyes stood out in stark contrast, captivating him, enthralling him. Hooking his muscular arms underneath Izuku’s legs, he wrenched them up and pressed them against his chest, resuming his brutal thrusts once more. Throwing his head back, a delirious smile stretched across his burning hot face, Izuku loudly squealed, bucking and rolling his hips in time with Katsuki’s thrusts. Felt so good-! It felt so fucking good-! Katsuki’s cock-! His son’s cock felt so immensely good-! His belly was so hot-! His pussy felt like it was melting-! This…he had never experienced anything like this before-! Even when his previous mate had impregnated him with Katsuki…it hadn’t felt this incredibly good-! He…he could feel himself getting addicted…Katsuki’s cock…his Alpha cock felt so good…

“You’re not gonna say that you’re not mine ever again.” Katsuki leaned down to murmur against his lips, “I’m not your son anymore. I’m your mate…that’s what you want, isn’t it?”

“My…mate…?” Izuku gasped, his pleasure adled mind desperately trying to digest what Katsuki was saying.

“Yeah, my mate.” Katsuki smiled widely, “Mine. Mine only. No can look at you, touch you, want you. You’ll be mine for the rest of your life. You’ll have my pups, you’ll live to be with me. You want that. Say that you want that!”

Blinking slowly, Izuku stared dizzily up at Katsuki. He would be with Katsuki…forever? He…he would never have to give Katsuki to another Omega? They could always be together? Izuku pulled in a shuddery breath. Swallowing down a mouthful of drool, Izuku slowly reached up with trembling hands to gently cup Katsuki’s burning hot face. His baby…his beautiful baby…he…he had always loved him so much. He…he had never wanted to give him to anyone. He…he always wanted to be with him. Did it really matter…if it was as his Mother…or as his mate? As long as he was with Katsuki…he was happy…

A soft, warm smile spread across Izuku’s face. He lifted his head to press a clumsy kiss to Katsuki’s lips. He inhaled sharply, pushing back into him, deepening the kiss even further. Pushing his fingers through Izuku’s sweat soaked hair, Katsuki pulled away with a soft gasp. Those bright eyes closely searched his face for a moment then his boy…his beautiful boy returned his smile with one of his own. Izuku’s heart fluttered. A fresh wave of heat rolled through him. Dropping down on top of him, Katsuki curled his arms tightly around him, squeezing him close. Izuku turned his head to lightly press a kiss to Katsuki’s temple. That’s right…it didn’t matter if it was as Mother and son or mates…as long as they were together, everything would be okay. Katsuki…his happiness was all that mattered. If Katsuki wanted him, if he was all that he desired, if this was how far he would go just to grab hold of that happiness…how could he possibly deny his beautiful boy what he wanted? As his Mother, he was supposed to spoil his child a little. That was all he was doing – spoiling his beautiful baby boy.