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Undyne had been pumped at the chance of dealing with her first home invader, and not just any crook at that. Ever since her girlfriend had shared her true crime documentary, ‘The Santa Claus’, the piscine warrior-now-cop had taken on the important facts as follows:
Number 1: Santa Claus can be rendered mortal, but only through violent injury.
Number 2: Santa Claus is an infectious entity, much like a zombie, but only his slayer dons his cursed robes afterwards.
Number 3: He can be baited by cow’s milk and store-bought cookies, thereby making it possible to lure the supernatural trespasser into a suitable killing field.
And so with great delight did she find herself one evening sitting on her coffee table in front of the fireplace, watching soot tumble down from the chimney and hearing the echoed curses of someone trying to break into their home. He was early though, it was only 6 pm on the 21st, rather than his usual M.O. but she was already prepared. Her biceps curled with carved definition, confidently able to wrestle as many reindeer goons as he had spare, whilst her fingers danced on the gardening flamethrower across her lap, ready to burn the accursed garment and end the threat of Santa for good. No armour for this fight, she wanted a real challenge for once and so was content to wait in her casual tank top that pulled tight against the outline of her generous chest, made all the tighter by her impressive definition. She just needed to hold steady until she saw the white of his beard.
However, instead of seeing a black leather boot or a cloud of festive magic slip into the currently unlit fireplace, a furred hoof kicked down into the open air, followed by a second and another bout of cursing.
Uh oh, already Undyne had surmised something was wrong. This was a Krampus situation, one that she was far less educated on. She discarded the flamethrower over her shoulder, summoning a spear in its place and levelling it towards the opening. Even if the old goat wouldn't die like his jolly counterpart, she was grinning like a shark at the opportunity to make him regret entering her living room without backup.
“Easy . .” Krampus’ lower body muttered before the rest of him finally dropped out of the chimney, “Peasy!”
*Crack*
Spear split stone as Undyne's weapon struck a couple of inches to the right of the home invader's trouser leg, embedded a half-foot into the fireplace fittings from the throw's force. To anyone else, it might have looked like a warning shot or a misaimed throw courtesy of the warrior's absent eye, but she merely clicked her tongue at the wide-eyed youth watching the spear dissipate.
“You’re lucky I saw your uniform, kid. If you'd shown up in plain clothes, I'd have shish kabobed you in a heartbeat, and then had an awkward conversation with Alphys about how I merked her student thinking he was a Winter demon.”
“Thanks for the concern?” The horned teen grimaced. “You must be her girlfriend, the cop everyone's scared of.”
“Oh they are, are they?” Her sharky grin beamed carnivorously, before eyeing her home-invader's bovine tail and fluffy ears. “And you're the half-minotaur in her Applied Sciences class. Funny, I hear ‘Cole’ for Christmas is a bad thing.”
“Yeah, I was hoping you wouldn't be here when I snuck my present in,” Cole said, dusting himself off before producing a small wrapped set of rattling DVD cases from his uniform, thankfully undamaged from the landing as he set them on the coffee table. “Getting the TA a Secret Santa gift is hard enough, especially when you want to make it a fun surprise.”
Undyne stroked her blue chin thoughtfully at these words, arms folding to press her impressive chest a little tighter inside her top. “So you
are
a little bit of a Santa then. The curse must be more prolific than I first thought…”
“What? Never mind. If it's okay with you, I just want to leave my present under your tree and I'll be out of your hair. Please don't tell her how it got there, I spent a long time trying to get in here and these aren't goat hooves.”
He made to move past her, but Undyne grabbed him by the collar and yanked him back towards the fireplace before pointing down at a suspicious-looking indent in the bull's pants leg.
“Hold your uncomfortably muscular seahorses, you think you can just drop into MY front room without another word, you little punk? Is that a shotgun or just another secret present bulging down your leg?”
“No, that's just . . all me, can I go now?” He said, more embarrassed that he was still stuck under the officer’s cyclopean gaze than by the question.
“Nice try, kid, but you’re not leaving without a stop and frisk. Looks like I've already stopped you, so now comes the-” Undyne pressed a firm hand against the trouser girth, groping and fondling the strangely warm mass before freezing when it started to swell and throb under her rough treatment. “What the runes?”
Without hesitation, she summoned another spear into her hand, curiosity too strong to be ignored, and sliced Cole’s pants open at the seams. True to his word, the bull had been going commando and a massive slab of semi-hard mottled horsecock broke free of the ruined garments, matched only by the pair of bowling ball-sized testicles that slipped out after it.
Undyne had never seen such a monstrous display of virility before in her entire life, not even from Alphys’ growing collection of strange rubbery penises that she was too embarrassed to admit about. The sight of this thing was like a blow to Undyne's stomach, dropping her to a knee and dissipating spear in hand.
Cole frowned at his shredded clothes, trying to avoid staring down the cop's impressive cleavage that swelled against her tank top. “I get it, it looks a little intimidating up close. Now if you could just let me-”
“Who said I was intimidated?! Just because you've got a little spear of your own, doesn't mean I can't take you down.” Undyne's head snapped upward at the accusation, one hand suddenly wrapping around her prisoner’s shaft like it was under arrest. “I've watched plenty of Alphys’ documentaries about how orcs and tentacle monsters use these all the time against their foes. How shrine maidens use every part of their body, including their holes, to exorcise evil spirits from ugly dudes! Sex is just another weapon in a true warrior's arsenal!”
Despite their loving relationship, she'd never gotten the straightest answer from her girlfriend whenever she popped a question about those videos. To Undyne, the exotically shaped training dildos that stuffed Alphys’ office cupboard seemed no different to any other armoury. Neither of them had ever so much as held hands with a guy, except when Undyne was about to twist their arm into a hammerlock. But on a surface world filled with galaxy-throwing robots alongside golden-haired monkeys and hedgehogs, Undyne was prepared to stake her soul against any and all challengers.
“Are you talking about hentai-”
“Shut up and watch me show you who's intimidated!” In one fell swallow, she punched the fat flare down her throat, wrapping her lips as far as the media ring. Her opponent let out a stunned groan from the sudden assault, which only deepened as Undyne dragged herself back and forth along the glottaling girth, fucking at least a foot of horsecock with her own face, fingers digging into his olive thighs so he couldn't even think of escape.
This was almost too easy for her. Sure, breathing through her nose was a little annoying, but all of that practice whilst secretly borrowing Alphys’ training dicks was certainly paying off. Her airtight suction already had Cole leaking precum like a busted faucet, which only intensified when she started palming his fat nuts like she was trying to weigh exactly how much cum he was smuggling inside them. Men it seemed, even unusually endowed ones, were way too easy to beat. Even when she hooked up her tank top to tauntingly tease her soft handfuls of perfect tit, all this guy was doing was relishing the show. This was getting boring!
She slapped his perky ass cheek, producing a yelp from above, her eye glaring up with a true warrior's spirit. ‘Fight me!’ Undyne said without words, tired of her opponent who had been content to simply let her beat him up with her throat. When he hesitated, she slapped his huge nutsack the second time, anticipating to at least produce a wince from Cole but instead, she just tasted more of his pre-cream as it spurted a double dose directly into her stomach. Even as she kissed back and forth up to the limit of his ring, she could tell it was surprisingly rich, despite Undyne having heard that men usually produced a salty or sour taste, not that she planned on admitting that to her foe.
Before she could level a third taunting smack, Undyne felt Cole’s hand as he grabbed a handful of her red ponytail for leverage. ‘Now we're talking.’
The medial ring shot past Undyne's lips, stretching her throat to its limit as the sloppy-wet foot of horsecock she'd been battling was joined by a second. Cole’s hips began to join the action too, swinging those massive seed-factories back and forth against Undyne's frame, rubbing her erect nipples through her tank top with each heavy sway.
“You sure about this?” Cole asked as he saw Undyne's vision start to unfocus due to a lack of air, but she growled back in her strange fury as her smile widened, displaying full rows of razor-sharp fangs.
Even as Cole battered her throat, and produced strange sensations of warmth in her pussy that no male had ever achieved, Undyne had him right where she wanted him, ready to ‘disarm’ her throat invader with a single chomp. Her jaw clenched with a strength that could shatter rock, she had once before as a party trick, but her teeth didn't sink a nanometer. Just as he'd been strangely unharmed by her earlier nut tap, the diamond-hard horsecock only seemed to grow harder and thicker, stretching Undyne's gnashers further apart. The minotaur stud's bullhood wasn’t necessarily masochistic, but more that it was such a supreme piece of unstoppable lust that it could only grant and receive pleasure regardless of any other rules or laws. Such as making Undyne's clit ache with need despite violating her girl-kissing throat.
The two feet of stallion shaft swelled longer and fatter against Undyne's teeth-play, the throbbing now a body-shaking rhythm that had her core tightening to its beat. Her hands nearly slipped down to aggressively finger her needy clit, the cock-beat was so bad. No, she had to hold on to win this, the only thing left now was-
“Here. It. Comes!” Cole rutted, yanking her lips down to kiss the root of his mega-member as his hyper-virile nuts contracted with audible, dam-busting release. White washed across Undyne's vision and down her throat, her lone eye rolling back into her head as the oxygen deprivation finally took hold. Sinfully delicious, ultra-potent cum coated her stomach, drowning the fish in teen bull jizz, too delirious to fight back. She might have remained there affixed forever as this stud's throat pet if he hadn’t finally let go of her red hair. Her grip on Cole’s thighs slipped away and Undyne fell backwards, splitting the coffee table in half with her arc and coming to a catatonic finish.
Cole took a breath, fetching the Secret Santa present from the shattered table with a slightly embarrassed look. He had only planned to drop off the charity store DVDs before scurrying back up the chimney without a word, not . . all this! Hopefully, his cute salamander TA wouldn't be too annoyed by her girlfriend's strange take on ‘Stand Your Ground’ homeownership.
He slipped the wrapped anime cases under the pine tree Undyne seemed to have dragged through a window, with a last “Merry Christmas, Alphys” and a sigh of relief. Now all he had to do was find a key to the front door and get out of here before-
A blue hand rested on Cole’s shoulder, gripping him with steel-warping strength. “Where do you think you’re going, PUNK?!”
Undyne's hand spun the half-bull around on his hooves. Where he had expected to meet her vengeful gaze, instead he was greeted by a massive pair of head-smothering tits. The one-eyed piscine had changed, her clothes in shreds, now grinning down at Cole from nearly eight feet of Determined nude woman.
Everything about her was MORE. An Amazonian set of muscles glistened as if she'd recently finished a full gym routine, complete with perfect abs you could shred wrapping paper with. Her other curves had more than overcompensated to match her new bulk, with huge, gravity-busting breasts capped with mouth-watering nipples, and a phat, dick-breaking ass that Cole could see the thicc circumference of even whilst she was turned directly to face him. Somewhere someone was playing boss music, but all Cole could hear was the rushing of blood to his ears.
“Looks like all that protein you had me drink wasn't such a smart idea after all.” She took a step closer, producing a meaty *whap* from her new body and thrusting her enormous man-killing chest into Cole's stunned features. “It's your funeral now, letting your enemy power up like that. Everyone knows you never turn your back on a fallen opponent, SQUIRT, FUHUHUHUHU!!”
She had to admit, he'd tricked her pretty good with that last move but now he was all hers. Awakening a taste of giant, meaty horsecock in her was going to be this kid's last mistake. Undyne's pussy was Determined to crush that dick until he begged her for mercy, and not before she squeezed an orgasm or two out for herself. All this power coursing through her had created an equally potent hunger that would be leaving this teen stud with a powdered pelvis before the night was over. “I know boys take about an hour to get hard again after they've cum, but I'm certain I can have some fun with you until then. Bet you've never been forced to suck such juicy nipples as these,” she laughed, grabbing a handful of Cole's hair before motor-boating his entire head.
Cole's horsecock twitched at these words, -and these tits- rising with renewed stiffness between Undyne's blue, toned thighs. Calmly, he took another breath, nostrils flaring at the scent of her arousal.
“Now that I've got you right where I want you, PREPARE TO MEET YOUR MAKER! Wait, are you hard alread-”
“HOLY SHIT HOLY SHIT FUCKFUCKFUUUUCKK!!” Undyne creamed again, holding onto her couch for dear life as the hyper-hung bull mercilessly slammed his ginormous cumtanks against her clit and repeatedly distended her steel abs with multiple feet of mind-breaking horsecock. She could barely hear her own moans over the sound of their bodies
whap-whap-whapping
against one another as Cole continued to mount her powerful bodice from behind and hammer inch after glorious, girthy inch inside her chain-orgasming pussy. So heavy were his strokes and so thoroughly was her cunt being reshaped, all she could do was beg him to never let this end.
“MORE HORSECOCK GIMME MORE HORSECOCK! FUCKING BREAK MY PUSSY WITH THAT FAT FLAREEE!!”
Somehow he was lifting her densely muscled thigh which probably weighed more than him now -not counting his cock-, resting it over his shoulder so that Undyne's cervix was receiving multiple direct blows a second. Both of them watched the absolute mockery Cole was making of her newfound strength, fucking her and throwing her around like his own personal fucktoy, breaking her pussy on his hyper endowment that had only swollen fatter and more virile as if it knew this new cumdump could handle the extra girthy inches and had since stopped holding back.
“GONNA DIE,” Undyne the Undying moaned as her vision rolled back into her head again in another life-ruining ahegao. “GONNA DIE ON THIS PERFECT, FAT, FUCKING STUD COCK!! FUCKING KILL ME WITH YOUR HORSECOCK, OR YOU’RE A FUCKING COWARD, AAAGHHHGHHH!!!!”
The couch gave a sorrowful creak as Cole flipped her like a pancake, grabbing handfuls of her powerful ass as he bent this titan of a woman into a mating press fold. There was a moment where, with more cunt-wrecking cock than was fair still inside her, he paused to offer Undyne an out, “You want to call it a tie?” He asked, having not even broken a sweat and his implicit mind-ruining threat aimed directly at the back of her pussy.
“N-n-NEVER!” She panted, her cock-crushing kegels squeezing around the jumbo-shaft still inside her, her walls kissing the beasthood in the hopes that it would stay there forever. “Wh-when you finally tire out, THAT’S GOING TO BE MY MOMENT TO STRIKE!!”
Cole shrugged before dropping his hips like an anvil, his cock breaching Undyne's womb at the same time the couch splintered under the pair's immeasurable sexual force. Undyne and furniture both let out pitiable sounds under his merciless thrust as wood chips and monster-girl squirt were left in his wake.
In the ruins of her couch, Undyne's phone finally connected to her girlfriend's. It had been a little difficult to tap the salamander's contact with the piscine warrior's womb-invader still teasing at her Amazonian body and Undyne's own refusal to stop making out even as the call came through, but as the dial tone cleared, she said, “So, hey Alphys, *Mwa* I need you to come home- *Mwa Mwa* like now. I have a special present I think you’re gonna love. -fuck, how is it still so big- I just gotta *Mwa Mwa* these balls too. *Lick* Ahem, sorry, just get here like now, there's so much I want to share with you. Too much for me
not
to share it *Mwa* or else I think he's gonna actually kill me, heh heh. Hope you’ve trained better than I did. Love you! *MwaMwaMwa*”
The call continued as Cole tossed the phone aside and dived atop Undyne once more. Alphys couldn't see her powerful partner's massive blue tits pancake against the young stud’s body nor how her toned legs wrapped around his waist as he initiated another cervix-busting mating press.
From her tiny back office, sitting in front of a desk full of papers to be graded, all the pale salamander could do was listen enraptured to the sound of Undyne's fucked-stupid moans coming through the speaker, her own pussy slickening in anticipation of her Christmas present.