Work Text:
Lately, Zhongli notices his body has been going through some… odd changes.
“Childe. I would like to speak with you, privately .” The serious tone of voice draws Childe’s attention from his work, and when he lifts his head he notices the archon’s reddening cheeks and flustered frown.
“Oh? And what do we need to discuss?” Dropping everything immediately, Childe rises from his seat and slots himself right against the other alpha, melding their bodies together to fit each curve. Adoring his mate's company, he tucks his nose into the crook of Zhongli’s neck to scent him gently, breathing in the comforting, earthy fragrance. Oddly enough, he also catches a whiff of something sweet and creamy. Like…
“Not for that reason.” Zhongli quickly shrugs him off with a clearly disgruntled expression and drags him off to a more private space, namely his personal chamber at the Wangsheng funeral parlor. Immediately upon arriving, Childe is roughly tossed onto a chair and faced with a very irritated alpha who is currently stripping off his own clothes.
“Ah- You just said it wasn’t for that, right?” Or did he just misread the situation?
Ignoring the Harbinger's confusion, Zhongli rips open the front of his own shirt, revealing his swollen, tender chest with beads of milky white liquid forming around reddened nipples.
Childe blinks once and stares, feeling his dick twitch in his pants at the sight of those luxurious mounds.
“Explain this. Now.”
He blinks again, not sure exactly what Zhongli is expecting him to say, so instead, he reaches for his mate’s waist and pulls him close.
“Sensei… Are you trying to seduce me?” Unable to resist, Childe leans in to nuzzle into the cleft of Zhongli’s chest and press his lips into the soft plushness with a purr. He gently gropes one side, feeling how swollen and tender they’d grown, and flicks his tongue out to lap up the white liquid.
Sweet, warm, and fragrant.
“Because it's working very well.” Childe latches onto one nipple and gives it a hard suck, moaning softly when he feels tastes milk pouring onto his tongue. The archon winces and shudders at the attention, his hips bucking forward instinctively as his mate suckles a bit too enthusiastically.
“Enough. I came here to make you take responsibility, not for you to… ngh!” A sharp sting of pain and pleasure makes Zhongli jolt and arch his back.
“Take responsibility? What for?” Childe pulls away from the nipple with one last suck, revealing a ring of teeth marks around the hardened bud.
“For causing these changes in my body. Ever since you-.” Zhongli furrows his brows in disapproval and pauses a moment to clear his throat, before continuing with a blush.
“Ever since you insisted on inseminating me, I’ve noticed my body acting in odd ways. For example..” The archon cups his swelling chest with both hands and squeezes, letting sweet rivulets of milk run between his fingers. It’s such a gorgeous, tempting sight, his mate lactating as if they were expecting pups. No doubt Zhongli’s body had been fooled into believing it had been impregnated the last time he’d been pumped full of seed.
“Mm? And what else?” Feigning concern, Childe pulls him closer and laps the milk off his soft pecs, taking a nipple into his mouth occasionally to give it a tentative suck, making sure to be gentle in case his mate starts to fuss.
“And my stomach… It’s starting to ache every time I smell your scent.” Zhongli closes his eyes in a distressed frown and places his fingers just below his navel, the place that feels so empty lately.
”Right here?” Finally pulling away from the archon’s plush chest, Childe slips his head down to nuzzle against the pit of his stomach as if to comfort the ache his mate feels. Then, with a delightful realization, Childe notices a lingering scent that grows stronger the closer he dips his head towards Zhongli’s inner thighs. The hard throb his cock makes when he takes a deep breath of it tells him exactly what that scent is.
“And what else, sensei?” He asks in a cloying voice, hands sliding down the other alpha’s backside to grope each cheek and slip his fingers between the crevice. When he feels a suspiciously wet spot, Childe tilts his head up to meet Zhongli’s eyes and smirks into his abdomen.
Insulted by the smug look on the alpha’s face, Zhongli frowns with stern disapproval, and in response, Childe drags him down for a passionate kiss. The moment their lips collide together it becomes a heated battle for dominance full of teeth and gasping breaths. Playing dirty, Childe reaches up to grope his tender chest and catch a nipple between his fingers to squeeze, drawing a surprised moan from Zhongli as milk dribbles down his chest. His tongue slips in easily and ravages the archon’s hot cavern until his knees go weak.
Dealing the final blow, Childe grips him by the column of his neck and growls into their kiss, telling the other alpha to submit. The vibrating feeling sends Zhongli’s instincts reeling, his alpha side tells him to fight back, but something deeper inside him tells him to give in and spread his thighs for his mate. Taking advantage of his dazed state, Childe pushes himself off the chair and topples them onto the floor in a tangle of limbs.
Zhongli parts from the kiss with a wanton moan and struggles against him, but his overwhelming arousal has left him sensitive and shaking, easy for Childe to overpower and flip him onto his stomach. Seeing the exposed nape of his neck, Childe leans in and presses his teeth against it threateningly, forcing him into submission. Finally, Zhongli tucks in his shoulders and arches his back in surrender, nape fully exposed for Childe to sink his teeth in if he wishes.
The dominant alpha growls deeply in satisfaction and ruts his rock hard erection against the cleft of Zhongli’s ass in victory, then proceeds to slowly strip off their clothes while thoroughly scent marking him. All Zhongli can do is bow his head and instinctively raise his hips to present his ass while Childe has his way, drowning him in the scent of seafoam and ocean spray. When his pants are finally discarded, Childe peers down at the slick, reddened entrance and smiles darkly.
“Do you know what’s happening to your body, sensei?” Without even the slightest bit of preparation, Childe lines up his throbbing cock and pushes into that tight, wet heat slowly. Zhongli releases the most lovely, drawn-out moan as his walls readily part to welcome his mate’s length inside. The archon shivers against the floor, clearly confused. Normally, they would always need to thoroughly stretch and prepare him to take Childe’s cock, so why are his walls gushing with slick every time he squeezes around the other alpha’s thick girth?
It’s as if… as if…
“You’re becoming an omega.” Childe completes this thought with a sharp grin and dips his nose into the crook of his neck to take a deep breath.
“And one in heat…”
“That’s impossible-” The other alpha wants to deny it, but even in his heat-stricken state he knows that the way his body is acting… can only mean one thing. His thoughts are interrupted when Childe pushes in deep and grinds his hips in small circles, drawing out light, gasping moans.
“Hmm, how many times have I fucked you full of my seed?” Their mating starts off slow at first, sweet and gentle in deep thrusts that make him shiver with satisfaction, his chest beginning to drip with warm milk from each hardened nipple.
“More than we can bother to count, right?” As Zhongli begins to recall the numerous times he’s been fucked senseless and stuffed with Childe’s virile, alpha cum, the Harbinger picks up his pace and begins to pound into him with harsh, shallow thrusts. He gasps and pants to the rapid rhythm, jolting each time Childe bottoms out and knocks the air from his lungs.
“And every time I cum deep inside you, your body changes little by little…” Two fingers press against the soft skin below his navel, right where he can feel the tip of his alpha’s cock ramming into him every time he fucks in balls deep. Zhongli vividly remembers how warm it felt to carry Childe’s seed inside him, how it made his walls ache with want every time he rubs a hand against the taut belly bump he was left with after every mating.
Childe leans into Zhongli’s back and groans deeply as he fully sheathes himself inside and stays there, gently bumping his hips forward against the back of the other alpha’s thighs. With the slightest nudge in the right angle, the tip of his cock dips into something round and smooth with just the slightest give. Zhongli jolts suddenly, feeling a completely new sensation prickle up his spine.
“Here’s the proof, sensei. Do you know what this is?” With almost cruel amusement, Childe hooks his fingers into Zhongli’s hips and pulls out just a bit, only to thrust back in abruptly and strike that painfully sensitive spot inside him.
“Ahh!” Zhongli collapses onto the floor in a quivering mess, hips held up by Childe while his quivering thighs no longer have the strength to support his own weight.
“It’s your virgin womb. Nice and tender, practically begging for me to fuck into it.” The Harbinger growls low and grinds his throbbing tip against the tightly closed second entrance inside his sensei’s belly.
“Nngh- Enough! It’s-...”
“Sensitive? I know it is.”
Every deep thrust and bump makes the archon’s shoulders shake with unbearable pleasure, drawing the lewdest moans that sound almost like a mating call to the other alpha. It’s almost too much. Zhongli presses his forehead into the floor and grits his teeth, biting back the shameful whimpers that threaten to escape when Childe’s cock attempts to force its way into his sensitive womb.
Feeling his cock struggling to push in any deeper, Childe almost pouts in disappointment and teases his mate with a cloying voice.
“Open up, sensei. Aren’t you going to welcome me in like a good mate?” He pulls out slowly, sliding his shaft along slick coated walls before pounding in hard with a grunt, attempting to brute force his way inside. But the newly formed organ is much too tight, remaining tightly closed even as Zhongli arches his back and screams.
“Hm… Not quite ready yet. But don’t worry, I’ll make sure to breed you well until your body learns to pleasure me and only me.” Childe smiles sweetly down at the shaking alpha, but Zhongli peers over his shoulders to glower at him with heated amber eyes.
“Do you plan to ruin me as an alpha?” His sensei’s tone of voice is bitterly accusing, matching the teary glare he receives, but Childe simply laughs and reaches down to twist a leaking nipple, causing the other alpha to squeeze so nicely around his cock as he jolts.
“I plan to turn you into my omega bitch.”
Suddenly, Childe’s slow, indulgent pace turns merciless as he leverages himself onto his knees and puts his entire weight behind every thrust. Their private chamber quickly fills with the sound of animalistic growls, unrestrained moans, and the wet slap of their hips colliding together. Zhongli parts his lips in an open-mouthed moan, eyes rolling skyward as he struggles against the other alpha.
Too much! I can’t take it. So full-
Childe ignores all of it and shoves Zhongli facefirst into the floor, pinning his wrists down to keep him restrained while he drags his teeth against the archon’s nape. He growls deep, emitting an overpowering scent that makes Zhongli shudder and instinctively submit. Even his slick walls clench and tremble around the cock buried inside him to appease his mate.
Take it. You’re mine to breed. All mine.
By the time Zhongli is a quaking, drooling mess on the floor, back arched and ass raised in the perfect breeding position, Childe is nearing his own orgasm and pistoning his hips with reckless abandon. Their rhythmic pace becomes erratic and desperate, Childe groaning deeply while Zhongli pants with near exhaustion.
Then, through the searing haze of their mating, Zhongli feels the base of Childe’s massive cock begin to swell at the base, catching against the ring of his entrance with each thrust.
“Childe… Your knot-” Zhongli gasps in a panicked voice.
“Take it, sensei… Show me how well you can pleasure your mate.” Childe murmurs low in his ear.
“You’ll break me, I’m not built to take it-”
“Show me how well you can pleasure your mate…”
“Childe!”
The Harbinger nuzzles into his damp hair, eyes closed as his cock becomes engorged at the base to the point where he has to sharply tug in and out, causing Zhongli to cry sharply each time. Finally, his knot grows too large to easily slip inside and becomes caught against Zhongli’s tight pucker.
He purrs encouragingly and rolls his hips, shallowly thrusting his knot just a fraction inside. Zhongli drags his nails on the floor, writhing in his grasp as Childe croons softly into the back of his head. His poor sensei, struggling so much to take his thick knot. Deciding to quickly put him out of his misery, Childe holds him tight, preventing his ability to pull away, and presses his hips forward harshly until his knot forces past that tight ring of muscle with an obscene pop.
Zhongli shudders violently the moment he feels his walls split apart to accept his mate’s thick knot while the tip presses tightly against the entrance to his womb. His lips part in a choked scream as his mind reels from the unforgettable pleasure of taking his first knot. When Childe cums inside him with a hot burst of heat inside his belly, Zhongli raises his hips and keens, begging to be impregnated by the thick rush of cum that floods his insides.
The archon's entire body shakes with a rippling orgasm, his own cock throbbing and spurting clear, sterile seed, having lost its virility. After the initial climax, Childe holds onto him tight to breed him lovingly and thoroughly, rocking their bodies in perfect tandem. When Zhongli falls slack in his arms, too fucked out to even keep himself propped up, Childe repositions them to lay comfortably in a close embrace and nuzzles into his tender chest. They bask in each other's warmth and comforting scent, one struggling to breathe with how heavy he feels while the other stuffs him even more.
While locked together by Childe’s pulsing knot, the Harbinger latches onto a swollen nipple and moans softly as he enjoys the sweet milk his mate produces, giving a hard suck every time he wants to feel Zhongli tighten up around him. And with every wave of cum that’s pumped deep inside him, Zhongli orgasm with a sweet shiver, his spent cock twitching uselessly in Childe’s loose grasp.
Well sated by their passionate coupling, Childe presses an endearing kiss against his mate’s temple and quietly praises how well Zhongli’s body responds to him, naturally squeezing and milking his knot for every drop of virile cum.
“You’ll make a wonderful omega, sensei…” He whispers, even when Zhongli is too dazed and well fucked to express his pleasure with words.
“I can’t wait until you’re nice and round with our pups.”
In response, Zhongli clenches around his knot with a soft moan and smiles blissfully through teary eyes.