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She didn't exactly dress like any of the other professors Xander had seen. Every day, she showed up in some striking outfit of black leather, decorated with all manner of occult trinkets. She didn't act like a teacher either. That leopardess was feisty, but altogether passionate about the weird things she was teaching. The otter had only enrolled in her class for the sake of filling out his final year credits. He figured it would be an easy pass to help him take his mind off his other, more challenging courses, but every day he spent taking in the sight of that wickedly curvaceous cat poised before him was one he lost himself in thought, forgot to take notes, and failed to even hear what she was actually saying half the time. Just how important were Professor Mahiri's extensively detailed lectures on demonology to his academic and professional career, anyway?

It was only when he found himself staring down at a big fat F on his recent essay that he realized he needed to start trying harder. She'd already swished off to deliver the other graded papers by the time he noticed the small addition beneath the mark, written in sharp, slanted handwriting.

My office. After class.

There wasn't a trace of her usual humour in that damning note. He immediately found himself oddly anxious about that impending meeting. In his neglect of learning her admittedly bizarre material, he'd disappointed the lovely cat. He probably deserved a stern talking to, at least. Though, even as he worried about what she was going to say, his mind still raced for other reasons too. Being all alone with the busty feline was admittedly an enticing prospect for a girly otter like him. He managed to fluster himself just imagining what she might do. As much as he knew he ought to have been hanging onto every word of her remaining lecture, he was as distracted as ever, even squirming in his seat while his imagination unshackled itself. He hardly picked up a thing about demon corruption even while she explained at length all the nuance and dangers of such. As well as the benefits.

He made brief, nervous eye contact with her when she dismissed the class and everyone started shuffling out. Her eyes always seemed so bright, reflecting even the dimmed lights she always insisted on when she was teaching. Before he could dart his gaze away, she simply beckoned to him and turned to leave. He watched the tight outline of her fine, shapely ass all wrapped in leather as she went. There was no helping himself. He got up awkwardly to follow, finding himself already a little entranced, already a little firm. Honestly, even if the whole meeting was just her getting mad at him for ignoring her class, that was going to be hot in its own way too. She seemed like the kind of cat who was sexy when she was angry.

Her office was repurposed from an old storage room, given she was just a temp professor. She'd still managed to make it her own, with wall-to-wall decorations. There were articles detailing demon possessions, photocopied excerpts from occult tomes, as well as an assortment of artistic depictions of various dark creatures all hung up along with numerous trinkets and totems. Xander might well have been able to identify them if he'd been putting more effort into her class, but as it stood, they all just looked like strange, spiky things. She sat behind her desk and folded her hands. The position hid much of her tempting body, but still afforded him a tantalizing look at her fluffy white cleavage while she gestured for him to take a seat. A five-pointed necklace rested just atop the crevice of her impressive hefty bosom. Maintaining something resembling eye contact was a feat of its own, leaving him biting his lip, trying not to let his attention stray. Or when it inevitably did, he did his best not to stare for too long.

"Xander. Hello. Thank you for coming," she said.

Her voice was warm and soft. Just listening to her speak was enough to send him into that distracted spiral once more, but he forcefully shook it off with a visible shrug of his shoulders.

"Oh, um. You're welcome."

She very faintly chuckled. Her body didn't move. Then she gave a long sigh and leaned towards him.

"I'll get right to the point. I can tell you're a smart boy, so why exactly is it you've seen fit to absorb next to nothing I've been trying to teach you? Do you not think what I've been saying is important?"

"Uh!" he quickly exclaimed, catching himself mid-thought.

His first instinct was to say no. It was all just a bit of fun, some mixing of mythology and history, right? Something that was interesting but that he'd never use again once the semester was done. Textbook definition of an elective, to say the least. But he wasn't going to insult her like that, so he just shook his head.

"No ma'am!" He gave a few quick nods for emphasis.

Her face visibly darkened, along with the room itself. Was that a flicker of the power? A very well-timed one, at least. In the lower light, her eyes shone all the brighter, projecting an aggressively green glow into his vision. She tapped her fingertips together.

"Please, Xander, you don't have to humour me. I understand you may have your doubts that there is truly anything beyond the veil. That's why I wanted to call you here, so that I might assuage them."

"What ... do you mean, exactly?" he couldn't help but ask, squirming in his chair just a little. There was something about the way she said that. It invoked such a strange feeling inside him, as if a void had opened up within his stomach.

"You will see. This is more a demonstration than an explanation." She rose from her chair, and all of a sudden she seemed to tower over him. He gazed up at her while she waved a hand and launched into her speech reminiscent of the one she gave on her first day of class . "Haven't you ever wondered if what you see is all there is? Is the world truly so mundane as it first appears, all the mysteries of existence explained away with simple science?"

Yes, that part he'd heard before. He silently nodded and let her continue. The next part was new to him.

"I'm asking you this, Xander, because I have seen it. There is something so much darker beneath the surface. It reaches out and grasps what it wishes. There are few places its tendrils haven't touched. Few can resist the call of corruption."

From there she broke into a broad, fangy grin. Seeing her teeth flashing like that briefly evoked something primal in the otter, as if he was laying eyes upon a shark or an orca in the waters of yesteryear. He reflexively recoiled while she made her approach, slinking out from behind her desk to stand directly in front of him. It was there that he noticed the considerable bulge in her pants. With her skintight leather leggings hugging her body like a catsuit at all times, he certainly hadn't missed such a shape, but it was so much bigger by the time she stood directly in front of him. He was eye to eye with the distinct outline of a fat, firm cock, not to mention her plump sack. She let that stand as her statement for a few seconds, with the otter utterly transfixed by her allure before speaking again.

"I know you've been thinking about me, Xander."

She licked her chops so indulgently he heard the slick sound of her streaking those shiny black lips with a light layer of saliva. Everything else had dropped away. He could feel the emptiness around them, as if that small office was the only place that existed anymore. Then there came those rumbles, those deep, bassy vibrations that were something even more potent than a purr. They filled the whole tiny room and rattled right down the otter's spine until they tingled at his taint. He shuddered, but he was far from cold. When she reached down to tap a finger beneath his chin and tilt his face towards her own, he followed her guidance without hesitation.

"Every time you cum to me, I grow more powerful," she resonated.

By then her voice had grown boomy enough to seemingly shake the whole room. Pictures rattled on the walls. Darkness crept up to the window and blotted out any view of the outside. It was just him and her. No one could stop her from taking what she wanted. When she sunk her fingers into his hair and lightly dragged her claws across his scalp, he didn't offer a shred of resistance. A mere tug was enough to direct his muzzle against her bulge. Her cock was so tightly outlined he could even feel a bulging vein against his nose while she rubbed it on his face. The scent of leather mingled with her own feline spice. His first sniff of that lusty natural perfume was enough to intoxicate him, to leave his head spinning and his mouth watering while he tried to think of a proper comparison. There was sweetness, there was richness, there was a velvety smooth something that added up to breathable sin. It invaded his mind and clouded his reservations for as long as she kept him smothered there against her, greedily humping his face.

It wasn't long before he started licking her bulge. He mostly tasted leather but there was a good initial sample of her flavour that left him immediately wanting more. The circumstances were hardly relevant to him anymore. That failed essay, the class, his whole degree. All that mattered was serving her. He was an addict for her essence from the very first taste. The slight moan that spilled from her dark lips was encouragement enough to make him keep going. They were tiny licks at first, but he soon graduated to long, sweeping drags of his tongue across the entire outline of her cock. His own pulsed rapidly between his legs until he'd soaked himself with the sheer output of his precum. It wasn't natural. Nothing was, when she was involved. He was starting to understand exactly what she meant by her grandiose speech, just as he was starting to lose his understanding of anything that wasn't licking her confined dick with worshipful, even obsessive reverence. That was all before he even laid his tongue on her bare skin.

This time, it was necessary to tug his hair firmly just to direct him away from her bulge. He didn't want to stop licking, not even for a second. She had to insist for long enough to get unzipped. It wasn't long before that hefty feline cock sprang from beneath her clothing to plap warmly atop his face. A thrust of her hips wedged his nose right between the base of that glossy black spire and two enormous leopard balls. He nuzzled and smooched her sack and laid his adoring licks upon it while her fat dick dripped some supremely warm precum into his hair. She marked him in her scent and claimed him as her own. He was lost in those otherworldly tastes and textures. He adorned her nuts with kisses and slurps until he could slowly fit his mouth around one of them. That was all he could fit, and even then it was a drooly, open-mouthed suck. His eagerness was his tribute to her while he worshipped for without a second thought. He was caught up in the hypnotic nature of her body to the point it jarred him back to reality when he heard her speak.

"Do you see now, Xander? Such a foolish boy you were to ignore the truth right before your eyes. Acting like I don't exist - the nerve!" She softly laughed. It echoed oddly, as if coming from a few directions at once. "You can make it up to me with those girly lips wrapped around my cock."

He didn't need the urging, but she tugged him by the hair nonetheless to put him exactly where she wanted him. There was no need for him to say anything. He simply moaned as he kissed the tip of her shiny shaft. A quick sniff was enough to make his eyes briefly roll back. He needed a moment to compose himself before he opened up to wrap his cute little otter muzzle around the tip of that thick, uncut dick. A firm suck on the first inch or two was enough to make him close his eyes and give her a long, muffled moan. Then he opened them again and fondly gazed up at her to watch her snarly expressions of pleasure and approval while he serviced her. Her rumbling was intimidating, but that just inspired him to dive down deeper on her dick to impress her. It wasn't about earning an A, or anything so mundane as that. None of that mattered anymore when he had that tantalizing cock in his mouth to drool all over.

It wasn't that he didn't have a gag reflex so much as Mahiri's cock fit perfectly in his throat. She plunged it straight down and he didn't even flinch. A deep, gullet-bulging suck was his tribute to her infernal glory. Part of him understood exactly what she was. Whether she always had been, or she'd instead been touched by something dark to twist and transform her inner self, that he didn't know. It was an important distinction. Hey, she really had managed to teach him something after all. But for the moment her lessons consisted of stuffing his whole dick down his throat and letting him guzzle the excess of precum flowing thickly from the tip with his every sloppy suck. He bobbed and gulped while he massaged her cock. She was merciful enough not to immediately facefuck him, but that was about as long as her patience lasted.

After he'd given her an adoring slurp and knead with his lips, she started pressing that glossy shaft in and out of his cute muzzle. At first she took it slow, with long, dragging thrusts back and forth. A rumbling rowl overtook her in time and he felt her fingers curling tighter around his hair. She might have even pulled a little of it out in her aggression. He didn't let that phase him. All he could do was brace himself and endure the solid plap of those fat cat nuts against his chin. They swung and smacked along with his every face-humping blow. Xander pursed his lips to make his mouth as fuckable as it possibly could be while his eyes rolled back with pleasure at the taste she inscribed upon his tongue. Every swallow, every heavy gulp around those many solid black inches kept him marinating in the forbidden ecstasy of flavours not meant for his mortal senses. It was no wonder he broke so quickly when he drank pure ambrosia from her cock. There was plenty more in store for him.

"Rrrrrrrngh," came her grunted snarl. "That's a good boy. You deserve to be my little toy for a while."

The way she phrased it, it wasn't clear if she considered such a thing a punishment or a reward. Maybe both. He sucked her off and clung to her hips while she rutted him between the lips with messy glides of his shiny dick. His grip was so tight he dug his fingers into her spotted ass, or the slight tease of it beneath her partly lowered pants at least. He was latched on and ready to drink her cream while she pounded straight down his bulging throat so that prominent vein was visible under his fur. A fountain of juices schlurked up from around his lips, even his nose, overflowing as the plunging downward strokes squeezed it out of his tight little throat. Her next snarl was much sharper, higher-pitched. She shrieked her pleasure while she gripped his head and shoved his nose deep into her crotch fur. That was where he stayed smothered while she twitched inside his mouth. A flag of her tail, a brief quiver of her thighs, and then there came that thunder again. It filled the room and presumably spilled out into the hall beyond the door - if there was even anything out there anymore. As far as Xander knew, it was the two of them fucking in the void. All he cared about was drinking her cum.

It flowed hot and rich in what felt like one long, continuous spurt. She hosed down his insides with her potent seed while he chugged it in quiet desperation. He didn't want to waste any. That was inevitable despite his valiant efforts. It spurted up from his mouth and splashed onto her own fur and clothing alike. It poured down from his chin and soaked into his outfit. He felt his clothes clinging to his fur, soaked right through by that thickly musked cream. She just kept going. No matter how much he swallowed, no matter how full he got, her balls never stopped clenching and pumping out that sinful demon cream. She made him a believer with every gulp of cum she gave him. Eventually it was enough to remind him of his own mortality. A strained glrrk came when he found himself struggling to swallow anymore. She took that as indication enough that it was time to pull out. The shocking tug of her dick from his throat left him feeling frightfully empty. She made up for that with a gushing facial. He vanished beneath the torrent of leopard cum when it hit his features with a splash. A drenching blanket of pure seed soon painted him from forehead to chin and well beyond, until there was hardly a part of him that wasn't coated in the claiming scent of her fresh jizz. Her dick didn't get any softer when she was done.

"Ahh. You see? There are certain benefits to letting the darkness in," she purred, the vibrations of those content sounds slipping into her every word. "I met her long ago. And ever since, things have only been getting better for me."

Xander gave a few vague murmurs that eventually built to a gurgled whimper. He wiped some of the cum from his face just so he could speak without choking on it. His voice came out ever so tiny, even for him.

"I-I ... I want it. I want what you have. Anything you can give ..."

He wasn't even really sure what he was saying, but it made the leopard laugh at least. There was something dark and haughty about that sound. It was different than before. She laughed like a haughty, wicked queen, lording over her subject. Then she just patted him on the head.

"That is a very cute thought, Xander. We shall see how you take to it. I've already corrupted you a little. Do you feel it?"

In truth, the otter wasn't sure what he felt. Everything. Nothing. Parts of him were a little numb, especially around his cum-swollen belly. He sloshed when he moved even in the slightest. A few pats to his middle and he simply nodded to her, eager to be affirmative even if he wasn't sure.

"I think I do. Your cock tasted so good ... " he all but whispered.

"Good boy. You are a fine worshipper. I do believe I shall keep you. One way or another."

He wasn't sure what that meant, but by the way she purred when she said it, it must have been good. For her, at least, and he wanted little more than to make her happy. She loomed there for a while, cock twitching inches from his face, sleek with the coating of cum and saliva that came from rutting his muzzle numb. He was ready to lick her again when there came some sudden movement. She was faster than his eyes could track. A shove to his shoulders sent him toppling back in his chair, flailing his arms as he went down. The crash landing on the rug below wasn't as bad as it seemed at first, but he was certainly stunned. He sprawled out below her while she stood above him, stripping from her clothing.

His vision was a touch blurred, but even he could tell that the way she undressed simply made no sense. One tug and her whole top came off, without so much as needing to remove it sleeve by sleeve. Another and she was bottomless, bare in her spots, her leather cast aside in a smoky haze. Maybe her choice of dress had been an illusion all along, and in truth she'd stood before him and the rest of her class totally naked but for the demon magic clinging to her rosettes. The thought just made him admire her before form all the more right up to the moment she overtook his vision by kneeling down over his chest.

At least she kept the weight off his swollen belly. The position let her drop her balls directly onto his nose, where she rested them a while. At first he simply took in her scent with a few fond sniffs. He quickly transitioned to licking her sack, swiping up the juices that had dripped there onto her creamy fur. She rubbed her balls on his face, ground them into his nose, bounced them up and down on his lips to make him kiss them again and again. The solid smek of those nuts playing on his features was enough to leave him blushing while he bulged in his shorts to the point of nearly bursting them. He'd never felt such pressure in his own cock before. The thumping, pounding urgency became suddenly apparent to him when he throbbed so hard the button of his bottoms popped open. Even the leopardess couldn't ignore such desire. She glanced over her shoulder and gave the smothered utter a smile he barely saw, then spoke in her luxuriously seductive voice with her balls still firmly planted on his face.

"Just look how needy you are. I bet you'd blow your load for me if I so much as told you to. You'll earn your release, in time. First ..." She rose up, and slowly turned her hips around until he was looking directly at the curves of her ample backside. " ... show me how devoted you are."

He panted with the desire to prove what he could do. That was when she made a throne out of him. Every proper demoness needed one, surely. She nestled down with his muzzle firmly planted between her cheeks and let him kiss her rim without even needing to prompt him. That plump ass totally enveloped his whole head with that much weight coming down on him. She buried him beneath that booty so she could fiercely grind on his face. The soft fur of her warm taint caressed along his lips until she found the perfect position for him to rim her. And oh how she purred when he gave her exactly what she wanted without a moment's hesitation.

He didn't just lick. He slurped and dragged and massaged that taut ring until he could slowly wriggle his tongue inside and eat her out like a proper succubus deserved. Even as he served her, he could feel her thriving on the attention and worship, as if reflecting her own pleasure back at him. It all just made his dick pump hard, until he spurted jets of precum in his shorts. His eager feasting on her ass came fuelled by the hope that she would grace him with release if he did his job well enough. That hope was enough for him to tonguefuck the gorgeous leopard's ass without need for a break or a breath of anything but her.

Even smothered beneath her, he could hear the wet sounds of her stroking her cock while he pleasured her. That must have meant he was doing a good job. He plunged deeper, deeper, pumping his tongue back and forth as fast as he could. His jaw hurt from the effort, but it didn't matter. The vibrations of her pleased rumbles kept him focused on his task. Finally, she lurched her body forth, but never relaxed the pressure on his face all throughout the process of stripping him. It was just like her own outfit. One tug and she removed garments without so much as worrying about the physicality of it all. He was pretty sure his own clothes had been real, but she dispelled them as if they had been nothing more than figments of his imagination. His cock stood up tall - if not as large as her own - and shot a skyward streak of pre as the pressure mounted to something he could hardly bear. The mere touch of a single finger on his spire was enough to nearly set him off.

"Rigid for your mistress, just how I want you to be. You've been cumming to me at night, or even in the middle of the day, slipping off to have a moment to yourself with all your dirty thoughts. I know. I feel them, Xander."

He might have been more embarrassed if he wasn't already chin-deep in her ass. She slowly swayed her hips to grind herself down on his face all the harder while she idly ran a digit up and down his twitching cock.

"I'm sure I could make you blow with a few strokes, or a little suck ... but that would be so easy. Here is what's going to happen, Xander. Put your tongue inside me. All the way."

He was already close to such, but a little more pushing had him completely buried within her. From there, she danced that single digit around his dick until she reached the top. Then, as if casting a spell with a magic wand, she tapped three times on his pre-smeared tip and firmly rumbled out her commands.

"Cum for me. As hard as you can. Let me see you gush from eating my ass alone."

Simply hearing her tell him to was enough. He didn't have to focus on his release. She gave him permission, and his body obeyed in an instant. His cock became a fountain of tribute for the dark queen who reigned over him upon the throne of his face. He sprayed his cum straight up and let it rain down over them both. Mahiri didn't move to avoid it. She let it splash into her hair, splatter her tits, and rain down upon the rest of her while she stroked her own cock to completion. Soon, Xander's relatively modest cumshot was drowned out and made irrelevant by the leopard's second release.

With his clothes gone, seemingly disintegrated into nothing but smoke, he was free to bathe in her essence and be marked right down to his toes until a puddle of hit cat cream formed beneath him. She slathered him in her corrupting cum until he was all but a blank canvas, fit for reshaping into the image she desired. And she didn't let off his face until her balls finally stopped pumping and her constant stream of fresh jizz ceased to a trickle right at the same time his own cock flopped over, utterly spent. Her own still remained firm. She grinned.

"I've always wanted to do that. She'll be so proud."

Xander still wasn't sure who Mahiri was talking about. When she rose from him, the creeping desperation for air came to him all at once. He'd never felt like he was suffocating right upon until he could breathe normally again. Then it was a matter of gasping, even wheezing as he recovered from her extensive smother. His head was spinning. Sometimes he swore he felt like he was dreaming, right up until she surprised him with another sensation that was as assuredly real as it could possibly be. His cock was partly soft for a short time, already starting to stir again just looking at the wicked goddess smiling down upon his mere mortal form, all painted in her spunk. That was long enough for her to spring her trap.

She didn't apply it herself so much as she simply made a few odd arcane gestures as if conducting an orchestra. Xander roused from his daze when he felt the clamp of steel around his partly softened cock. A cage closed firmly around his inches, ensuring he couldn't get any bigger, no matter what she did to him. His response was to immediately fill out the confines of that chastity device with a tiny, pulsing hard-on that remained in captivity for as long as she decided.

"You see, Xander. I am not one for reacharounds. A proper demoness knows how to fuck the cum out of her servant."

She reached down to pick him up, grasping his arms tight and pulling him close to her face. Her clenched teeth made her next words much more commanding.

"You're going to blow another load for me. When I tell you to. Understand?"

A low rumble of punctuation ensured he felt her words as much as heard them. He nodded his head, and she let him go, seemingly to fall back to the floor. The inertia made him gasp and reach out for her, but as soon as he flailed his arms he was startled by the sudden rattle of some heavy shackles bound around his wrists. Those were some serious, dungeon-quality bindings. They were attached to two chains that protruded from the walls, seemingly punching right through them. Mahiri stepped back, made a casual upwards gesture, and just like that, Xander was lifted into the air. His wrists, and then his ankles, even his tail were all bound in heavy iron or something stronger. Squirming did nothing to distract those bindings that kept him all stretched out and exposed to the sultry mistress. Arms behind his back, knees bent, feet pointed towards the ceiling, tail lifted and stretched taught - he couldn't have possibly been more vulnerable to her whims. She drew the tip of her tongue along her lips as she observed her own handiwork. He was all hers.

The treatment ensured he was desperately hard for her. Those few trembling inches pounded against the metal, but it was never uncomfortable. He was exactly as hard as he needed to be to accept all the pleasure she saw fit to give him. She took her time. Strolling around to his side, she ran her claws along his spine, she lightly squeezed his hip, she passed a flat palm along one cheek of his ass. The otter was soft, curvy, girly - everything a big-dicked succubus could possibly want, or at least he hoped so. He wiggled a little to see if his chains and shackles would provide room to move. Not even in the slightest. He was stuck there, left to breathe deep and inhale the scent of sex as the leopard finally nestled herself behind him and between his lifted thighs. He felt the intense warmth of her breath crawling up his spine as she leaned across his back. She shrouded him with a blanket of rosettes until she could lick at the back of his neck. Hopefully she knew that otters didn't have the same kind of thick scruff as cats before she got too bitey.

A little whimper escaped his throat after the first few slurps of her scratchy tongue. She licked him harshly enough to almost take his fur off, but the result was a moaning plea in a single stammered word.

"M-Mistress ..."

It seemed the most appropriate thing to call her. He immediately felt her purrs intensify when it left his lips. It seemed he was correct. She let her fangs glide against the side of her throat until she found a spot where his neck met his shoulder to latch on and give him a solid bite. That might have hurt more if he wasn't so caught up in the moment. As it stood, it just made him moan for her before she even penetrated him. That was coming. She teased him with her sex-slick cock preseed up between the curves of his ass. Grinding there was the perfect way to keep him whimpering. A smooth, slow glide of that wet, glossy cock against his fur and rim alike was enough to make him clench his teeth, to close his eyes, and completely lose himself in his desire for her. Essay? Professor? Degree? Those words had no meaning to him anymore. Being caught up in her presence meant he was little more than a vessel for her pleasure and cum alike, desperately awaiting the feeling of her sinking that shiny dick deep beneath his forcefully lifted tail.

"Yes, yes, yes ..." he repeated. The words came automatically to him, as if she was speaking through him. A puppet for her to manipulate as she wished.

"Such radiating desire, Xander. A demon was bound to find you someday. You should be thankful I was first." She softly chuckled in his ear, then fell to a whisper. "Some aren't so merciful."

Though that was perhaps meant to be comforting, she spoke it so fiercely that it felt intimidating anyway. Was there something more within her, ready to be let out? He was going to find out. She nibbled him and dragged her claws down his back without hurting him, but that all certainly told him she easily could have. He trusted her. That was his only option at that point. It was easy not to worry when he had a fat dick prodding his sensitive rim, slowly spreading him out with just enough pressure to enter him. A low whine started coming from his lips and he couldn't stop it. There was nothing uncomfortable about getting penetrated by her, other than the anticipation that clenched through his body and shook his shackles until those chains loudly rattled and drowned out his fussing. The leopardess lightly chewed on him while she whispered her seductively comforting words.

"Patience."

He was trying. Every little bit of her that sank inside his body was one worth squeezing down on, kneading in his tight, pumping backside as a welcome. She sped up in the slightest once she popped the thick head of her dick inside. From there she could spurt her excess pre into his rump. He could feel the warmth not just under his tail, but spreading all through his body as if it was becoming part of his essence. Maybe it was a little corruption already. He'd already swallowed plenty, but this was different. This was the shaking, quivering ecstasy of being fucked by his demonically depraved professor turned mistress. She let her mouth water as she sucked upon his throat and sank her cock into his constricting depths. It was enough to set him into rapid pumping clenches before she was even halfway buried. Another rumble rolled through her body, slightly snorted, almost machine-like as she vibrated atop his back while he dangled for her. A long strand of precum stretched all the way from his confined cock to the puddle on the floor without ever quite snapping off, and it just kept dripping.

Those fierce purrs dominated all the other sounds in the room until she bottomed out with a firm thud of balls to his own and a rowr from her lips. She made her way up to one of his ears and nibbled it while he huffed and flexed on her every single inch of thick, bulging meat. The shape of it showing in his belly would have been impressive if he could look down to see it, but his eyes remained shut while she danced her fangs along the back of his head. It was enough to remind him he was dealing with a leopardess, not just a cat. She was a predator, a dangerous beast, and the darkness lurking within just made her all the more threatening. Yet even so, she quelled any possible worries with that smooth, sloppy fuck.

She started slow. Pushing, then tugging, sliding out from his stretched rim almost all the, and she paused. Holding herself there was enough to make the otter squirm again, what little he was able in such tight bindings. She waited until he whimpered again and then plunged into him before he could grow too desperate. All he could do was toss his head back and sing for her in his broken, quavering voice. A chorus of moans and cries came with her every steady thump as the pleasure shot through his entire body at once, screaming into every nerve.

It didn't take long for that ferocious, growling fuckbeast to take over. She treated him gently for half a minute at most. From there it was rutting, pounding, driving deep into his body with long, lunging thrusts. She used every inch of her cock to fuck him even if that meant it took longer between each stroke. Slamming up against his tight otter ass was her way for making up for the wait. She shook him, pounded him, shattered him with her unending strength and stamina. He tightened for her no matter how hard she plowed him. Xander refused to be anything but the perfect sleeve for her, kneading on her cock every time she sank fully balls-deep in his rump and held herself there for half a second. Then another yank from his depths, another thrust, another thunder roll through his bound body as she clutched him by the chest and dug her fingers into his fur. Sometimes he felt her claws, her teeth, but she refrained from injuring him. She broke him just right, in the way he always needed but could never fully explain.

"Yes ... !" he could only faintly whisper when he wanted to scream. His pleasure was their secret for as long as they were locked together in the void. So close. And yet, his body never went over the edge until she spoke the magic words.

"Good enough," she mused, then broke into some spitting snarl-speak. "It's time. Cum for me, Xander. Don't you fucking dare hold back."

Toe-curling, eye-rolling, spine-tingling ecstasy was just the start. Xander lost control of his body and fell to odd convulsions as if she was possessing him from within with the plunge of her cock and the slap of her nuts. That device kept his cock all locked up, but it certainly didn't hold back his orgasm. He vacuum-sealed that fat dick and blasted his spunk straight down to the floor below to mingle with the rest. His ass flexed and fiercely pumped on her while he creamed himself for his goddess. That was the word for her now. Not just mistress. She was a queen to him for as long as her cock fucked the bliss into his tender mortal body.

A clutching bite to the back of his throat finally brought the wails out of him. It was a good thing the school was long gone, somewhere back in the realm they'd left together. His screams pierced the little office turned fuck den, until his throat was hoarse and he'd emptied out every single drop of cum his body could possibly churn up. That didn't stop him from dry-firing for a full-minute longer. Even when his climax ached his body pumped on, stiff and tight all over, constantly clenching inwards as if desperate to milk his mistress just as dry.

Mahiri leaned herself up from his back and took him by the tail. That was how she finished herself off with him, yanking the sensitive appendage to the root with the other hand firmly planted on his hip. Long, rolling, athletic thrusts started off coordinated. A few dozen of those and she lost her rhythm in favour of a primal plapping, of rutting and spanking him faster, harder than ever before. It was beyond anything he'd ever seen, not to mention felt. She became a blur of motion, a distorted, sped-up video of herself as she claimed him with demonic strength and speed alike. The slapping and thumps to his ass were enough to numb him on the outside, but he felt every single inch within him.

He couldn't cry out any longer. The best he could do to tell her how much he loved what she was doing to him was to dumbly drool as he did his best to even understand the second climax she forced out of him just when he thought he was absolutely spent. Feeling her precum growing thicker, her spurts more frequent, her shared warmth more intense was enough to set him off again and sync up with her viciously anticipated cumshot so they could rock together in shared delight for as long as that finish lasted. Which was much longer than he could ever have expected.

"Let my seed claim you," she snarled before tilting her head back and letting those gurgling snarls boil over into a triumphant roar.

He'd seen big cats deliver that sound before. It was always as impressive as it was disruptive, shaking windows and rattling drinks off tables if they weren't careful. Hers was different. It was as much a shriek as it was a bellow. She called to the darkness around them in a harmony of voices, all of them her own, none of them the same. He felt the sound in his gut. It rattled him, even scared him for a moment. There was some glimpse of what she really was - or what she'd become, at least - in that sound. But when it came accompanied by the surge of seed, the thick and heated cascade of pure cat cum, he could forget about his mortal fears for a while.

His mind shut off for as long as she used him for a condom. He was purely a vessel for experiencing everything she had to give him for those enduring minutes. He'd never had a cumshot last more than a few seconds. With her spurting him full of belly-stretching spunk, he gushed and squirted for her well over a full sixty, until he was stricken utterly blank. A drooling, dripping, stupefied demon's slut, he dangled loosely, unthinking, only feeling, nothing more than a ruined, empty vessel with his belly full of leopard spunk.

Picking up the mental pieces one by one, he had to remind himself who he even was as he panted there in those imposing chains. Mahiri held herself inside him until her cock finally stopped its constant twitching. Even then, it gave the occasional jolt, even if she wasn't filling him any longer. She stroked along his hips, his sides, his chest, and eventually made her way down to his belly to rub along the shape of his inflated gut. It sloshed, it gurgled, but it was never uncomfortable. Or she didn't allow him to feel any discomfort, at least. He wasn't sure.

When he could see again, he squinted at the room, and then blinked to try to clarify he was really seeing what he thought he was. The darkness outside the window was thicker somehow. He felt as if it went on forever. But more alarming was the crawling of the walls. It looked as if it was constantly melting before him, swimming into itself, reshaping into jagged shapes only to smooth over and start the process over once again. He wanted to glance back at the leopardess herself, but he was far too bound to move much. Instead, he had to wait until she schlurrrrped her cock out of his stuffed backside and made a fountain out of his gaped hole. She slowly strode before him and tipped his chin up with a finger so he could look her over once more. He already knew her secret, but until that moment he had yet to see it truly manifest.

The horns were a given. Two sets stretched and curled from her head to form a queenly crown. Her eyes were the same colour, but a thousand times more intense. He couldn't look into them for long, lest he lose himself in the essence of her emerald glare. Her upper fangs curled right past her lower lip like a sabrecat. Everything was bigger. Her bust swelled out even thicker, even heavier. Every moment she spent like that was living in defiance of gravity itself. Of course, he could only barely glimpse those tits past the sight of her towering cock. It grew to twice, thrice its initial meaty size, until she was ready to nudge it out of her face with one hand. With the other she clutched the base of that imposing black spire and slowly stroked up and down. He could hear the squelch of precum flowing from the tip. An arc of translucent juices shot up into the air and rained down upon his face while she proudly brandished that colossal weapon. Xander truly had no idea what she meant to do with that, but he didn't have much an idea of anything at all after that powerful fuck.

A little gesture was all it took to slowly lower him down from his chains. He found himself on his feet again, albeit shakily, as the shackles released. Even his cock sprang free once that device detached itself and clinked to the floor. When she beckoned to him, he was compelled to come closer, and closer, until he planted his face right into the depraved excess of her demonic dick. He licked near the tip a few times while he balanced himself with his weight leaning against her shaft until she slowly angled herself to let him make contact with the tip. The cumslit gaped and flexed before his eyes, at least until he was forced to shut them as he got spurted in the face.

A mere gob of precum was as potent as a whole cumshot from anyone normal. He was somehow even more drenched than he already was after lingering before her glory for a short while. Eventually, a hand on the back of his head directed him precisely where she wanted him. He found himself smothered against the tip of her corrupting cock, hmmfing as he got immersed in the excess juices leaking from that broad slit.

"Right there, Xander. I have made up my mind. How will you ever truly learn if I don't show you?"

She left it as cryptic as that, and gave him another shove. That was enough to schlurk his muzzle into the grip of her cock. It flexed around him and kneaded like a throat, seemingly gulping him deeper with every heavy squeeze of the heated walls around his face. A little deeper, a little more. She sucked him into her dick with the constant pressure from all sides. Once his head entered her, he was surrounded by slurping sounds and darkness. Her scent was as thick as it was intoxicating. He fell deeper into drunkenness as she slowly took him down the length of her cock, a little bit of otter at a time.

There was no need to shove or force him in. All she needed to do was stroke her cock and drag her prey down that glossy shaft until his stunned face formed a clearly outlined bulge. There was no question what she was doing to him. If she didn't intend to swallow him whole with her dick, she wouldn't have been stroking so firmly, or flexing so tightly around his slender form. Every messy cock-gulp sent him slipping and sliding closer to his clenching, churning fate, all for the crime of catching her attention and looking ever so delectable.

"Hhhhhhss ... that's it ... your fate looms ... " the leopard seemed to hiss with a flick of her forked black tongue.

Xander only partly heard it. He was caught up in the cacophonous symphony of slurping and sucking occurring in the confines of the cat's cock. The wet noises overwhelmed him and kept him from panicking too much, even when it was apparent he wasn't getting out, no matter how much he squirmed. She mrowled and rumbled until he could feel those contented vibrations in her gripping dick while she squished the walls around his shoulders and worked down his chest to lightly stifle his gasps.

A bigger hurdle was the bulging shape of his cum-swollen belly. That was going to take some kneading, some ample squishing with the strength of her cock to flatten over enough for her to swallow. Cum poured from his well-fucked rump while she worked him down that hungry slit. He managed little more than a few weak kicks once he was engulfed in leopard cock up to his waist. His paws swung through the air in vague indication of ... something. Objection? Fear? Pleasure? He hardly knew himself anymore, basking in the intensity of sensations that came with being consumed by the wicked feline.

Mahiri tossed her head back and gave a firm thrust of her hips, swinging Xander's body right along with the sudden shift in momentum. She couldn't help but show her elongated fangs again with a feisty snarl of rising bliss.

"Yessss, good boy. Take a nice deep final dive, otter. You're so very good at it."

It wasn't so much a dive as a plummet, but she was right about one thing. His body fit ever so perfectly in her cock, hugged tight by the walls around him as they dragged him into her hungering depths. It wasn't long before he dunked down into her heavy nuts. His greeting was the blorp of churning spunk. Those chambers hardly worked like any regular sack. They were tanks full of cum, heaving, clenching, gurgling away to produce more the moment he touched down to the bottom. He was swiftly submerged beneath the surface, briefly drowning in fresh, pure cream before wriggling to the surface with a steaming gasp.

Spurts of precum shot up around his legs as she rapidly swallowed them down to finish devouring him. He felt her rapidly stroking around the bulging shape of his hips, then his thighs, and then she reached up to pat the pads of his paws as she slurped them away with a mist of juices in their wake. Just like that, he was fully inside her, enveloped in her heat, worked down to sag her fat balls almost to the floor as before she clenched up around his form to trap him in a helpless pose as digestive gurgles rang out from all around him. It was a sauna, a hot tub, and the constant sensory assault of demon spunk ensured he couldn't stop to contemplate the moment, nor the increasingly fleeting nature of his existence.

"You inspire such hunger, Xander. You were doomed from the start, in truth. Such a shame you didn't pay more attention. You might have understood the danger."

Mahiri sucked a breath through her clenched teeth and then straightened up again, putting on the illusion of steadiness. Now and then she huffed or snorted in pleasure as she slowly caressed along the surface of her well-fed cock. Her balls did all the work for her. They worked in a constant, ravenous flex around the bulge of otter inside her sack, constantly kneading him and splashing the hot jizz all over his naked body. It soaked into his every single inch, every single hair of his short fur. His hair was matted to his head, his scalp inundated with the cream that burbled all around him.

The heat kept him stifled, kept him gasping whenever he tried to make any other sound. Words were far from his capacity for as long as he stewed within her nuts. His mind was functional just enough to notice what was happening to him. The longer he churned up in those fuzzy cumtanks, the softer and more sludgey his body became, until he was barely able to feel his fingers or toes anymore. That numbing feeling just kept crawling up his extremities, working towards his centre, and the whole time he couldn't escape the singular thought. It was bliss to become her spunk, no matter how much his mortal side ought to have been horrified by his impending end.

When he tried to summon up the strength to say her name once more in tribute and praise to the gift she gave him, he could only gurgle. He was as much her cum as he was an otter. More so the former with every squeeze of those walls around him. They smoothed him over and hammered down around his shape until there was less and less of him that was recognizable. Some part of him hit something like a peak while he was still relatively whole. It was hard to tell if he was cumming, or simply merging with Mahiri's own pleasure. The leopardess emitted a constant rrrrr while she rubbed her dick to something near a peak.

Her shaft gave a mighty pump that rolled right down to her balls, forcing them to jump up tight under the base of her cock and flatten over the otter's form almost entirely. His malleable self squished into something vaguely resembling a person for a few seconds, but somehow he endured on, still feeling, still perceiving, right up until the moment she clamped down again with intense, orgasmic pressure and utterly snuffed him out with the greedy churns of her ravenous nuts. A heavy slursh and he was nothing but a load of cum to stretch and bloat her balls, sloshing around in those fat, jiggling tubes while she pleasured herself with both hands.

Before she fully finished, she scrambled off to her desk - a constant even as the realm itself shifted into a nightmare - and removed a simple piece of latex from a drawer. It was much more than just that, of course. Someone of her potency, with a sack full of freshly melted prey, needed something tinged with a little demon magic. It even had his name on it. That was why it fit so perfectly around her otter-eating cock, encasing the glossy black in a layer of violet to ensure that excess cream didn't flood her office. From there, she leaned her spotted ass on the edge of her desk and rocked her way to a final release. A horrifying shriek might have sent Xander scrambling in terror if he was anything more than a load of jizz by then. Yet some part of him still heard it.

He wasn't fully blank, even after annihilation in her nuts. There wasn't a trace of his body left, but plenty of lingering energy remained churning away within the cream he had become. The leopard shot his cummified body straight out into the swiftly bulging condom even while she worked and kneaded around the glowing remnant of his existence, that precious soul that defined all he had been, and all he had ever been. It was her prisoner to do with as she wished.

Speaking mid-orgasm made for some shaky words, but she did her best to maintain that same dignity as before nonetheless.

"All mine. All mine. I was going to keep you around, Xander. A pet. A trophy on my curves. But that precious soul of yours." A flick of her tongue came with another wet, greedy hiss. "I'm going to take it for my own pleasure. I'm going to absorb every last trace of you and turn you into a cumshot. Do you believe in me now?"

He didn't have a body with which to respond to her. All he could do was feel a fleeting sense of terror as he briefly understood what she was doing to him. That flicker of his essence in her nuts, churned and squeezed by the fleshy walls as if it were tangible, that was all he had left. And the longer she filled that condom with cum, the less of him there was. A thought, a memory, a piece of his identity - every passing moment meant another thing got sloughed away and turned into the gushing load shooting from her cock. His cum was glowing by then. That ghostly blue-green of soul sludge decorated her cream until that condom was bloated to a bursting point.

She swiftly reached over to snatch another before she popped the first, and swapped them out as quickly as she could, tying off the first. Of course, that still meant plastering the walls of her shifting, distorted office in some of that otter-made load. He joined in with her pleasure, feeling it as if they were one body for a short time, until one more firm pump of her nuts erased the last of what he was. That little blip of light beneath the smooth white fur of her balls faded to nothing, and the rest was simply a matter of emptying out her swollen sack and slumping down in a delighted sigh.

"Mmmmhhf ... all mine. All gone." She licked her lips and stood there with her eyes closed and her ears flat for a while. Then she perked up and got to work.

Tying off that second condom was tricky with her hands all slick and slippery. She dragged it along with the first and tossed it into that same drawer. Such a thing made no Euclidean sense, of course. It was just a small desk, with room for a few books at most, yet when she opened it up, there was plenty of space for two bloated bags of cum. Right along with the others. There must have been a dozen or more condoms wobbling there, all filled up to the brim with gallons of demon seed, each of them branded with a name just like Xander's new dwelling. The succubus smirked to herself at the sight. Right where she left them.

The otter was another permanent meal along with the others, devoured to satiate the leopard's unending appetite for pleasure and indulgence. Some extra heft on her dick, her nuts, and her curves alike was the final legacy of Xander's life. All that, simply because of a single essay. Well, that wasn't entirely true. The only reason she ever needed was she wanted him. And there would be plenty more, to deepen her demonic power, to send her further down into depravity and corruption, no matter who she consumed along the way.