Undead Labyrinth
The instant the dizzyingly thick scent of a man and the briny, clinging reek of semen came wafting up from the huge, scorching futanari cock Marie had thrust right up to her face, the last thread of Iris's reason snapped clean through.
Haaaahhhn——!
That visual shock alone, together with the smell stabbing up into her nose, sent what felt like thousands of volts of current racing along her spine, and a wave of pleasure she had no hope of suppressing came crashing down; eyes rolling white, she burst into another squirting climax toward the empty air.
Looking down at her as she sobbed and shuddered from head to toe, her face drained bone-white, Marie curled her lips into a smirk and seized Iris's jaw firmly in hand, pinning it in place.
"Now then, Iris. Open that jaw wide. I'm about to pick up the pace even more."
The moment Marie's command fell, the tentacles that had been tormenting her clit with tenacious little sucks began drawing on it with an even more vicious hunger, while Marie clamped down hard on the back of Iris's defenseless head and brutally forced her monstrous cock into that trembling, gaping mouth.
Guhk— mmph... ugh... mmmmph—!
At the huge intruder barging in with one thrust all the way to the back of her throat, Iris's eyes flew wide with shock. Under a pressure that felt as though her jaw might come unhinged, she thought desperately through her addled mind, tears welling up.
'It's... too big... at this rate my jaw really will pop out of its socket... hnn, I can't breathe...!'
Granting not the slightest mercy, Marie left her thick slab of flesh buried to the brim in that mouth and commanded her coldly.
"What's the matter, Iris? Move that tongue faster and lick every last corner."
She wasn't licking because she wanted to. The massive cock stuffing her mouth had sealed off every passage for air, and if she hoped to live—to scrape together even a single breath—her tongue had no choice but to flail desperately and carve out space. Whether she willed it or not, raw survival instinct reduced her to the wretched spectacle of licking and sucking at Marie's huge cock.
Marie savored every second of it, pistoning roughly into her mouth while drinking in the stifled, strangled whimpers leaking through the gaps in Iris's lips with each thrust.
"Haah, honestly... if you keep sucking that well... I'm only going to get harder, you know? Truly, you are a wicked little thing, our Iris."
Even as she delivered the joke, and without a shred of warning, Marie drove her cock to the deepest recess of Iris's mouth and unloaded a scalding rush of semen.
Mmph——! Guhhk... mm, mmm... mmph, grrmph...!
Unable to hold back even a fraction of it, Iris was forced to gulp down the staggering volume of cum flooding her throat, retching with every swallow, barely managing to breathe at all. Tears spun from her eyes along with a climax that felt like her mind burning white. One minute passed, then two, and the ejaculation showed no sign of ending. Only after that terrible release had stretched past five full minutes did the cock finally slip free, and Iris, her stomach weighed down with hot semen and churning with nausea, dry-heaved against the floor.
Cough, hack... cough... huuorgh... iht'sh fihlthy...
Seizing that face—smeared with tears, saliva, and some liquid that might have been vomit or might have been semen—roughly in one hand, Marie peered down at her as though it were nothing at all and whispered.
"Now then, it's time to make Iris-chan truly regret ever having stayed a virgin until today♡"
Snap—!
The instant Marie flicked her fingers, the waiting tentacles all moved as one, hoisting Iris's body up and tilting it into the perfect position for penetration. A breath later, Marie's grotesquely swollen glans smacked wetly against the entrance of Iris's utterly soaked pussy.
'No... I trusted her... even after being so horribly betrayed by the person I gave my whole life to... then why does my womb... why is it leaping with joy like thisss...!'
The desperate rejection in her heart and the blasphemous pleasure of a body instinctively welcoming Marie's huge presence collided head-on, grinding Iris's mind to powder. And before long, Marie's cock began to sink slowly, but mercilessly, deep into her pussy.
When it reached all the way to her cervix in a single stroke, Iris shuddered from head to toe, gasping as though wrung out.
"Haah... too... iht'sh too deepsh... mmm... at leasht... a lidle more... shlowly... haaaahn..."
"What am I going to do with you? If you're already struggling this much, it's only going to get worse from here. I haven't even gotten halfway in, you see."
At Marie's words—that she had already been pounded to her very depths and yet not even half was inside—Iris recoiled in horror, eyes flying wide, quivering. Pickled through with pleasure, her tongue badly twisted, she let out pleading moans in a slurred, hazy voice.
"L-Lady Mawie... your cock... why oh why ish id sho biiig... my headsh going all dupid... I can'd... nnngh...!"
Marie, too, seemed barely able to handle the tight, clinging grip of that exquisite little vessel, her breath rough through her nose as she murmured.
"Ahn~ this feeling of being squeezed so tight from the very entrance...♡ This is exactly why I could never, ever quit hunting virgins...♡ Especially you, Iris-chan—you're the tightest little pussy I've ever tasted, tighter than any bitch who came before you, so you may as well be proud. Clamping down on my cock and refusing to let go like this... your grip is simply out of its mind, isn't it?"
Right away Marie dug both hands into Iris's ass, hoisted her up, adjusted her into the position optimized for a mating press, and drove her cock in several times deeper and far more ferociously than before.
"L-look at that... even as it squirms and tries to shove me back out, Iris-chan's pussy is swallowing my cock with such unbelievable greed...♡ There we go—half is finally in."
But from where Iris stood, even half was ruin. Her cervix had already been forced open and pried into, and simply drawing breath had become an ordeal. Enduring a pleasure too great for her brain to survive intact, she moaned in anguish as her inner walls clung with everything they had to the massive cock lodged up against her womb—a cock she could not possibly contain.
'Hnngh... it's too much. But this feeling of it plunging in over and over... it's so, so good I think I'm going mad...!'
In the end, instinct won out over reason. Iris wrapped her arms tight around Marie's body, clinging pitifully to her shoulders and the nape of her neck as though they were the only things left in the world to hold onto.
Marie, apparently caught off guard by the unimaginable clutch of Iris's perfect little pussy, lasted less than thirty seconds before she climaxed hard inside, erupting semen directly against the innermost depths of her womb.
Grrrgle—— spurt, spurt, spuuurt—!
"Aaaahh... iht'sh coming ouuut... nn-hiiii... hiiiii...!"

Iris remembered, down to her very bones, the monstrous volume Marie had unloaded in her mouth earlier, and terror seized her that if she let her keep coming like this, her belly might actually burst. Waving limp arms, she pattered her fists against Marie's chest, begging her to pull out, but Marie smacked her lips teasingly and, as if to say not a chance, pulled Iris into an even tighter embrace. In that crushing hold, their bodies sealed together without a hair's breadth of space, Marie's cock slammed ferociously into Iris's womb yet again.
"I don'd... wanna cum... iht'sh... I'm dyiinggg... my head keepsh melthing awayyy... I can'd... hosh id... nngh, hoooh... hiii...!"
Tongue twisted, pronunciation utterly destroyed, Iris wailed at the top of her voice in a dissolving slur. Just as when her mouth had been filled, the internal ejaculation went on without pause for a full five excruciating minutes deep inside her womb, and by the end of it Iris's lower belly had swelled out conspicuously round, like a woman at full term.
Only much later, once she had finished emptying herself with a long, satisfied groan, did Marie slide her cock smoothly out of that pussy, press her lips over the dazed girl's, and linger there, greedily mixing their spit as she stole the kiss.
The remarkable thing was this: with that much semen pumped inside, it should have come trickling down the moment the cock withdrew—yet not a single drop escaped. Marie's thick, clinging cum remained packed to the brim, pooled and sealed inside Iris's womb without wasting even one drop.
Seeing it, Marie stroked Iris's sweat-damp hair with tender fingers and offered her a word of praise.
"To take every last drop of my semen without spilling a single one... our Iris-chan really is such a clever girl♡ I knew it—Iris-chan and I truly are the finest match in all the world."
Iris had been thoroughly steeped in pleasure as well, her face vacant and blissful, tongue peeking out just slightly as she twitched and squirmed.
And then Marie murmured under her breath—"Now, how shall I ravish our Iris next..."—falling deep into thought over how best to torment her. Seizing that split-second opening, Iris clawed her scattered wits back together and began crawling silently across the floor, inch by inch, desperate not to be caught.
'No... if I keep taking this, the person I still am will be finished for good. I have to run...'
But it was an empty dream, and Marie saw through it instantly—she pounced down over Iris's back, pinning her to the floor, and brought her mouth right up beside her ear.
"And where do you think you're going, Iris~?"
Marie whispered low, hotly licking the shell of her ear.
"There's no way you could ever escape at this point. What a silly little fool you are~"
"S-Shtop... pweathe, pweathe... no mooore... anymore I jush... keep cummying sho eathy, aaaaahhh...!"
Before her pleading words—her tongue gone slack and mangled—could scatter into the air, Marie's cock plunged deep into Iris's reddened, swollen pussy for the second time.
"Hahn... if you pud id in like... like that again... my body getsh sho shensidive... I really can'd hosh id anymooore... hnnngh...!"
"Don't hold back. Take that pleasure exactly as it comes and enjoy it to your heart's content. Though, well... if Iris-chan weren't so wonderfully cheeky and defiant... dominating her wouldn't be half so satisfying, now would it♡"
Leaving that teasing advice behind, Marie's cock—far prouder and more forceful than before, as if determined to skewer her womb clean through—plunged in to the very root. Iris's breath jammed in her throat; her eyes rolled back and she spewed out moans like a beast in heat.
'Noo... I hate it... what even is this... it's so deep, on a completely different level from before... is this really a cock a human being can have? It feels like my womb is being stretched open from the inside...!'
Marie smirked with wicked delight as she watched Iris's reactions turn fiercer and her cries grow ever more desperate with every jab against the depths of her womb.
"Oh my? Your reaction is worlds apart from before. Aha—I see it now. Being pinned down underneath and fucked silly was your taste all along, wasn't it?"
"No... iht'sh nod... aaahh, nnhahhh...!"
"Pounding you at this angle, a cock that could barely get halfway in before now drives all the way to the root as if punching straight through... which means your cervix is under tremendous pressure...♡ So this is what you wanted all along, Iris-chan? To have your womb crushed and pressed and squeezed?"
If that's our Iris-chan's wish, then of course I simply must grant it, Marie whispered sweetly—and then pushed the speed of her pistoning to its absolute limit, fucking her like something possessed.
Iris, eyes rolled back to the whites, streamed tears and drool without end.
'Dangerous! Dangerous! She's insane, she's completely insane...!'
Those two sentences alone hammered through her skull, over and over, pasted across the inside of her mind like wallpaper. Then an enormous, climaxing jolt pierced her whole body and surged to the crown of her head, and she mumbled on in a voice emptied of all self, more sob than speech.
'My brain... iht'sh melthing awayyy... I hate id! I'm cumming... cummy, I'm cummying... ahaaaaaahhh...!'
Flattening Iris completely beneath her from behind, pistoning into her without pause, Marie murmured in a low, throaty voice.
"Iris-chan's pussy... I am terribly, terribly fond of it...♡"
Desperate to claw her way out of that hellish chain of pleasure, Iris thrashed and writhed against the body crushing her down—but Marie only laughed, "Fufu♡ As if I would ever let you escape," and poured down even harder, more merciless thrusts from above, as if to crush her cervix utterly flat.
"Go on, then—cum until there's nothing left~ and become completely, entirely mine♡, Iris! Nnngh... a-and now I'm about to—aaahhh...!"
Amid both of their ragged panting, Iris and Marie shrieked out frenzied moans in unison and hit the very summit of climax together. Marie scattered her third load of semen, unstinting, into the womb that had been heated clear to the bone—and in the same instant spurted a thin trickle of yellow pee, her hips twitching in fine little bucks as she rode out a squirting climax of her own.
Iris's climax, once started, did not stop for even a single second until Marie's eruption deep inside her finally ended. That release raged on insanely for a full ten minutes—longer even than before—and thanks to its monstrous volume, Iris's belly swelled out grotesquely round, rounder even than a woman at full term.
Convulsing from head to toe, her reason long since flung off into the Andromeda galaxy, tongue loose and slurring, Iris spewed animal whimpers into the air as the time that followed was spent in copulation with the tentacles.
"Hiiiii... hnngh... ahaaaahhh... Lady Mawie... pweathe, pweathe, no more... I-I'm, I'm cummying———!"
