Nightmare Moon's Rubenesque Revenge

by MetalBrony20

Rating: mature
Tags: Fetish, Porn, Sex, Princess Celestia, Alternate Universe, Anthro, Main 6, Nightmare Moon, Princess Luna, My Little Pony: Friendship is Magic
Length: 8331

In which Nightmare Moon's exacts revenge upon Princess Celestia, in the most delicous way possible!

Princess Celestia expected she would be captured upon  Nightmare Moon's return. Chained up, imprisoned upon the sun. A great many things filtered through her mind, though cake definitely wasn’t on that list anywhere! As the diabolical Nightmare decides to enact a strange revenge upon Celestia, her waistline will be expanded to sized unfathomed by either party. 

This is a partial retelling of Friendship is Magic Part 2, with a fattening twist to it!

Contains:

-Weight Gain (Skinny to Blob)
-Immobility
-Slight Mental Alteration
-Mild Exhibitionism

Published 2022-01-16 18:20:00 UTC
Last updated 2022-01-16 18:20:00 UTC

Chapter 1

“Wakie wakie… my dear princess…”

A low, purring voice slowly bubbled through Celestia’s mind as she fought her way back to wakefulness. She groaned, her head pounding fiercely, forcing her eyes shut. Pressing a hand to her skull she rubbed her temples, the headache dissipating into a dull thud. Far more lucid, her mind went back to the voice that had called out to her. It was familiar, not one she’d heard for a long time. Yet she couldn’t place it, finally opening her eyes and shifting herself in her seated position to take a look at the pony who dared to…

She stopped, blinking as she gazed towards them. A lump formed in her throat, her breath catching in her throat. The silver-blue armour that curved around the figure’s body. The midnight black skin, seeming to suck in the light around her like a great void. Those predatory eyes, a piercing blue that glinted menacingly in the light of the room. A flood of memories burst forward like a dam, shooting to the forefront of her mind as she regarded the creature that stood just meters away from her. The monster that used to be her sister.

“Recognise me, sister?” The creature purred out in a sensual tone, the corners of its lips turned up into a grin, showing a pair of pointed fangs that gleamed like razors. Celestia slowly rose to her feet, pulling herself to her full height as she continued to lock eyes with it.

“Nightmare Moon. I should have known this’d be your doing.” Celestia responded, restraining the bubble of emotions that had perforated her mind.

“Hm Hmm… guilty as charged… Are you pleased to see me; it’s been ever so long since we last met… hmm?” She giggled as she spoke, laced with an underlying tone of hysteria.

“I have been more than fine thank you.” Celestia curtly replied, her mind abuzz as she took stock of the situation. The room she was in was a small, boxy affair. It was devoid of detail, save a few rusted metal brackets that propped up some rotted wooden boards. The only thing else was the door, the opening filled by the Nightmare. She had been captured, that alone was obvious. Her limbs, however, were able to move freely, that much was clear when she’d stood up. Even her wings were free, unfurling the majestic plumage from her back.

“That’s wonderful to hear. Must have been wonderful to have the place to yourself. Although, that was how it was beforehand, yes? I can’t imagine much changed since you’ve ruled alone, considering how your dear sister was never a part of the picture regardless.” The Nightmare sneered, its smile growing more manic as she watched Celestia’s expression darken.

“That’s not true. That’s just lies you’ve fed my sister to allow you to take over.”

“Perhaps, though, it’s not like she can fight back very much anymore. After those first few hundred years on that desolate rock, she’s grown awfully quiet.” Nightmare Moon stepped further into the room, her toned body rippling and flexing with each movement. The way she moved was far too casual for Celestia’s liking, tensing up and moving into a battle stance. The Nightmare paused, the same wide grin taunting her.

The demon was trying to goad her with its silver tongue, its demeanour, and its mannerisms. And despite how clear these intentions were, Celestia would defeat this abomination and save her sister. From within her, her magic flowed like water from the purest stream, rising through her like a star burning a planet to cinders. With a twitch of her head, the tip of her horn was pointing towards Nightmare Moon’s neck. She intended to defeat the creature here and now.

The pure magical energy roared up, her mind forming the spell matrix as she pushed it through her horn. Except, nothing happened. Magic flowed up her horn, abruptly stopping a short distance along. Again and again, she attempted to summon forth the power that could annihilate mountains. She gritted her teeth, clenching her fists as she tried once more, the casting interrupted as a hand glided onto her horn, gently rubbing it.

The suddenness of the action brought an uneasy moan, responded with a laugh. “Having some performance issues there? I heard it happens in old stallions, but I didn’t know it could happen in old mares too.” The Nightmare drew in close, her hand continuing to rub up and down Celestia’s horn as the other pinned Celestia’s arms. “Did you really think I’d just let you, one of the most powerful magic users in Equestria, be unrestrained? I suppose all that fat you’ve accrued has gone to your brain as well if you’d think I wouldn’t put a magic inhibitor on you.”

Glancing up, Celestia watched as the Nightmare’s fingers curled around an ancient magic inhibitor. The design was far cruder than the ones she was used to, but the power of the device alone was staggering. Great plumes of raw magic vented as she attempted to push more energy through, harmlessly dissipating into the air. She yelped as she felt the Nightmare grab her around the middle, grabbing at the demon’s arm as it roughly fondled her gut.

“My word, what a piggy you’ve grown to be. Where did all that muscle go?” With a sharp push, she managed to dislodge her captor, rubbing at her middle. She grumbled at the creature’s words, refusing to meet its challenge, regardless of how true the statement may have been. Whilst the Nightmare’s muscled form was clad and accentuated by beautiful gleaming armour, Celestia’s flowing dress failed to fully hide her weight. She wasn’t fat per say. Chubby at worst she supposed, as her soft middle pressed outwards slightly.

“I no longer needed to have such a figure. Equestria hasn’t faced any major threat in millennia. I was needed to lead the country as its figurehead, not as a vicious tyrant.”

“Is that right? I suppose that’s why you need to scoff cake so much. How many did you eat last week; I seem to recall there were at least three.” Celestia paused, confusion knotting her eyebrows. “Oh yes, and they were chocolate, vanilla and coffee if I recall correctly.”

“How did you know that?”

“You think I’ve been idle this whole time? That I’ve just twiddled my thumbs on that desolate ball of rock, listening to your sister’s pleas and cries?” She pointed to her horn, tapping it a few times. “I have the power of an alicorn at my disposal. I have more than enough magic to do almost anything I want. The spells that would allow me to break the seal restraining my physical being would take centuries to work. That, however, didn’t stop me from projecting my magical force beyond. Astral Projection is such a useful spell, and I’ve been using it to keep up with Equestria’s affairs.”

“I’ve watched Equestria change, watched how some things change, yet some stay the same. I learned, going through the spells in your castle’s archives as the students from your school read them through. Influenced of course, by me. My form was still mostly disconnected from the dream realm. Mostly. I could still enter a few. Push a few pieces here, pull some strings there. If I was persistent enough, I could accomplish a few minor tasks”

She paused, giggling again as she watched the dumbfounded look on her captee’s face expand. “Of course, just because I could go down, doesn’t mean I’ve spoken with anypony else. I may or may not have given into lunacy a while ago, not that I really mind too much. I’ve watched, waited and planned my revenge to ruin you.” Stepping back a short distance, she beckoned towards the door, horn subtly glowing a rich blue.

Hesitating for a moment, Celestia begrudgingly followed, stepping out of the room. Like the room she’d been in before, the hallway she found herself in showed signs of clear decay. The stonework was cracked and weathered, with great patches of lichen covering sections in a patchy green collage. The floor was bare stone, save for the moth-eaten remains of a few carpets. Pieces of shattered rocks sat amongst deep cracks in the floor, water dripping down through holes in the ceiling. The immense pillars holding the roof were fractured, coils of vines snaking down as large cobwebs spanned to the wall behind.

Despite the darkness and the passage of time, Celestia recognised the place. “Just like everything in life-related to Luna, you cast away her home too. Such a shame too, I rather liked the architecture. Far better than that... thing you call a castle now.”

“What is your goal here, Nightmare?” Celestia barked, gritting her teeth. “These insults and jabs are naught but childish. You talk about plans and revenge, yet you have done little to me. I have many plans of my own already in motion, I’m sure you know which one I’m talking about.”

“Oh yes, the one involving the purple unicorn and the Elements of Harmony? Quite the ambitious one, I must admit. And if I’m being quite honest, it’ll most likely succeed. You’ve handpicked probably the best group of ponies to embody each element. Even if I was to run or fight, I know that something would go wrong. Don’t misunderstand this as full acceptance of my fate. The traps I’ve set throughout the forest should delay, or injure them if everything goes right, and I’ll claim Equestria as mine.”

She leaned in close again, near nose to nose, their horns clacking together. “I’ve been watching you for quite some time. That gluttonous part of your being has come out in full force over these long years. Even with an Alicorns metabolism, you can’t hide all those calories, regardless of how formless the dress is. Before my spirit is ripped from this wonderful host, I wanted to let not only Equestria, but the world know just how much of a wobbling, jiggling pig you are. That, and I want to have a little bit of fun too.”

Motioning with a nod, Celestia begrudgingly followed the Nightmare down the hall, heading towards a pair of familiar doors. Drawing in close, Celestia couldn’t help but notice a peculiar smell in the air. Far different than the smell of decay and wet that permeated the castle, it was far more palatable, far sweeter. With a flick of the Nightmare’s horn, and they opened, creaking on rusted hinges.

Like a wave, the sweet smell washed over her, permeating her nostrils, taking in several deep breaths. Standing in the middle of the old throne room was a cake. Highlighted by shafts of moonlight that pierced through the shattered windows, the immensity of the dessert was fully apparent. There was only a meter or so between each wall, the great sugary mass of the cake, the top rising above the base of the windows. The design itself was simple, divided into two concentric layers, the smaller top piece still easily able to fill most of a Ponyville house. The top of each layer was covered in a thick layer of vanilla icing, layered over a thinner strawberry one, creating a wavey pattern over the rich, chocolatey sponge below. A deep pink icing formed a large snaking wave around their middles.

It was utterly glorious, Celestia’s eyes glued to the wondrous sight before her. A low, rumble elicited from her middle, accompanied by a thin line of drool from her mouth. “My stars, how… this is…

“This is the biggest cake in the world, I know. Not the tallest ever, but by sheer volume, oh, this is by far the largest. So huge, so delicious, and all sitting here alone.” She replied, her voice soft as she wandered behind Celestia, her horn flaring to life. “And it’s all yours for the taking…” She smiled, spell matrices forming as the solar princess stood in place, eyeing up the mother of all desserts. Her mind was in conflict. The rational part of her mind screamed at her, screamed that it was a trap, a ruse; the cake is a lie. And yet, the other part of her yearned for it. The scent, the size, the composition was all so utterly divine. She could only imagine the taste and texture, how moist it looked, how the flavours burst in her mouth. Little by little, this part of her mind became louder and louder.

She was aware of the faint tingle of magic across her skull, the influence of another tampering with her mind. She could do little as it latched onto her gluttonous side, amplifying its commands tenfold and burying everything else. Celestia staggered forwards, pressing a hand to the side of her head as she tried to wrangle control back. Another burst of magic from the Nightmare stemmed this notion entirely. With one final grasp to the side of her head, she staggered forward and practically launched herself at the side of the cake. A loud ‘splut!’ issued as Celestia’s front was suddenly splattered in copious amounts of icing. Wrapping her arms into the mix of sponge and frosting, she buried her head, taking huge mouthfuls.

The desire to consume the dessert only grew stronger as the heavenly taste washed over her taste buds. As one seasoned in the art of cake eating, it didn’t take long for her to process each mouthful. Spurred on by her amplified wants, she gobbled down more and more, soon carving out a head-sized chunk that she eagerly set about her expanding. “Mmmphhh… mmmm, oooohh, it’s shoooo goooood!” A muffled moan elicited as her icing splattered muzzle emerged to snatch a quick gulp of air, the lustful tone of it bringing a smile to the Nightmare’s mouth.

“How nice of you to say Princess. The royal cake disposal giving me a compliment about my baking. I’m honestly quite flattered…” she laughed, casually walking up behind the glutting mare. “Though, it is rather easy to convince you that it tastes nice when I can so easily alter the properties of the cake to make it as tasty and addicting as possible…” she trailed off, reaching about and wrapping her fingers around Celestia's hips, grinning as she found a new roll of fat, giving it a light squeeze. “…not to mention, I made it as fattening as equinely possible as well.”

Indeed, as Celestia busied herself with forcing as much moist sponge and sweet icing into her gullet, the effects of said gluttony were apparent as day. Her slight chub had been upgraded as pounds upon pounds began to accumulate across her frame. Her gut had pushed forwards an inch or so, forming a definitive pot belly that jiggled inside the tight confines of her dirtied dress. A juicy pair of rolls connected to it, ringing around the top of her hips to create the beginning of love handles. Her back too was starting to lose definition, developing a meatiness that hadn’t been there before.

The Nightmare smiled in glee as she watched Celestia’s butt expand before her very eyes. Like a pair of water balloons, those two orbs swelled up and up, subjected to the bombardment of calories that her belly gleefully digested. Reaching out, Nightmare Moon laid a hand upon the rightmost cheek, cooing as she felt it become softer and softer, pressing against her hand and forcing the lithe digits to sink into the pliant pudge. As Celestia continued to expand, the poor dress was forced to conform to an increasingly unsuitable body. Whereas it had once reached down to her ankles, it was now riding up towards her juicy thighs. Moving lower, the Nightmare’s probing hands inspected those exposed legs, marvelling as the gap between them gradually diminished. She squeezed a good handful of pudge, a sputtering moan eliciting from above her.

Those thighs continued to thicken, sagging, and creating an overhand as they swelled onto her lower legs, which were also into the process of puffing out. “My goodness, it’s only been a few minutes and you’ve already become quite the porker, haven’t you?” The question flickered into Celestia’s mind, the taint of the Nightmare’s magic urging her to nod, her budding double chin squishing into her growing neck fat. “Oh, do you like it when I call you a pig? A hog, a lazy sow?” A needy moan was all the response the demonic mare needed, laughing again as she toyed with a new fold of back fat.

“Well then… you don’t need to stand on ceremony then. Just eat, eat and eat all your heart desires… and I know your heart desires so much more.” Grabbing the back of Celestia's head, she shoved it deep into the hole, the Princess of the Sun tearing out more and more, using her pudgy hands to shovel more towards her thoroughly messy face. Food was everywhere, her hands and mouth covered in an ample amount of icing and crumbs that stuck together in a sticky morass. This was soon becoming more and more apparent elsewhere as her thoroughly soiled dress continued to provide less and less protection from the whirlwind of gluttony surrounding it.

Cackling, the Nightmare watched the fabric strain and struggle against Celestia’s thickest belly roll. Amongst the sound of unfettered consumption, she could hear the unmistakable sound of threads popping. In canon, she watched as large welts formed, the thread ripped and plinked apart. Finding more room, the compressed flesh oozed its way through. The extra pressure exerted began a chain reaction as the wardrobe malfunction accelerated. All over, smooth fat burst forth, her true size revealed as her booty spread forth. Turning around to attack the wall of cake to her right, the Nightmare could see the devastation that had been wrought on Celestia's front. That initial round belly had morphed. So much fat had collected it’d forced it into two rolls that had begun to sag down and cover her almost complete nudity.

Her breasts too had steadily blimped larger and larger. The pair of ovoid mounds were overflowing her straining bra, ample amounts of white flesh pouring over the cups and squishing into the straps that were hugging against her for dear life. “Now what do we have here? With the size of the breasts, I think you’re more of a cow than a pig, don’t you think? A lazy heifer, wolfing down cake and turning herself into an ever-larger mountain of useless, wobbling lard.” Nightmare Moon gleefully taunted her, licking her lips in delight as she watched Celestia’s cutie marks come into view. Only just visible beneath smears of icing, the familiar symbol had become distorted, as rolls and folds began to mar her flanks, as did the accumulating amount of cellulite dimples. Like bowls of pudding, they sloshed back and forth at the slightest movement, colliding against each other with quiet smacks.

Between the shifting orbs, the Nightmare spotted her panties. Like her breasts, they were fighting a losing battle against the tsunami of obese alicorn blubber. Turned near spaghetti thin, the garments were lodged deep inside. She grinned, watching the material fray and give way as another mouthful of cake was rapidly digested. Crossing the threshold in what was surely morbid obesity, her movements had grown awkward and sluggish as several hundred extra pounds were dragged down by gravity. Despite the mounting weight, her own alicorn strength helped to counteract and keep her mobile.

Though it wasn’t becoming a matter of strength whether she stayed mobile, but more so her own body conspiring against her. Her thighs continued to swell larger, pressing into each other no matter how wide she spread them apart. Combined with her now apron-like belly that sagged down, she was forced into a waddle to move at all, just shuffling her bulk a step or two before she buried her head into the cake once again. She was just an eating machine, using any and all part of her being to scoop and tear more cake and sentence it to the billowing rolls that was her gut. Dozens of new folds and rolls appeared as her body struggled to add yet more fat to her already enormous frame, each as spattered and smeared with cake detritus as the last, her entire form devolved from the once cool, collected monarch into a slobby glutton.

And the Nightmare was loving every second of it. Her most hated adversary, once an equal in strength and physique, was just standing only a few meters away, so fat she’d barely be able to lift a finger to stop her. So utterly transfixed by the dessert, she only vaguely acknowledged the Nightmare playing with the blobby alicorn body. Her fingers glided and swam over every curve and outcropping of blubber they could find, finding herself moaning alongside Celestia as she fondled deeply into the fat. “Oh gods… you’re so fucking fat Princess… so soft, so plush, so warm…” She moaned as she worked her way along, trying to find the thickest part of her fat, eagerly wobbling the hefty slabs as creamy white flesh oozed through her fingers. Moving down her fold choked back, the two globular ass cheeks tantalising wobbling back and forth.

Cocking her hand back, she let it fly, a loud smack reverberating through the room. Celestia groaned, pausing in her feast as a sudden jolt of please lanced across her over nourished blubber. A red handprint had been left amongst the sea of white. A second, lighter smack issued from the other cheek, as the Nightmare began to toy with the pliable mounds. Smacking, squeezing and jiggling was par for the course as the royal rump was abused. “Ahhhh… oooohhh… this feels soooo good! Oh, how I’ve missed the feeling of another pony…” she ejected lustfully, stepping back as she reached to her sides. With a burst of magic and a loosening of some clamps, she removed her armour, quickly stripping down to just her undergarments.

Metal clanked against stone, leaving her in nought but a simple pair of panties and a bra. Her midnight black form shone in the dim moonlight, highlighting every feature of her form. Despite nearly being in the nude, she didn’t notice the temperature change at all, slowly padding her way back to the princess turned hog. She’d hardly taken notice of the Nightmare, too consumed by complete greed, her only thoughts turned to a bestial desire to consume. Not caring as her form devolved further and further into a mass of snow-white softness. Bereft of her magic, and forced to use her increasingly clumsy hands, the Nightmare watched as Celestia struggled to gouge another horrendously fattening slab of pure calories from the cake wall, grunting and panting all the while.

“There you go. Chew, swallow, chew, swallow. There’s nothing to it!” The Nightmare shouted in glee, laying each hand upon each of those immense, saggy ass cheeks. Pressing in, she cooed as the malleable flesh oozed through the gaps in her fingers, her smile widening ever more as she squeezed and mashed it about, watching in delight as the cellulite dimpled ass deformed further and further. More moans came from Celestia, just barely managing to prevent herself from choking as pleasure lanced through her mind. All those hundreds of pounds of soft, sensitive fat, pleasured and touched in such an intimate manner. She was revelling in the feeling, consumed by pleasure as she grew wider and wider.

“Oh… would you look at that… you’re as wide as you are tall! And you're such a tall pony too… imagine how many hundreds upon hundreds of useless… jiggling pounds you’re lugging around. Or perhaps you’ve passed into quadruple digits. It wouldn’t surprise me, not in the slightest.” Indeed, looking past the copious amounts of stains and mess covering her form, there was no denying just how much her body has pressed outwards. Privy to a front row seat, the Nightmare could actually feel the immense badonkadonk balloon in her hands, the jumbo beanbag sized orbs sagging down upon thighs built like tree trunks. She’s not seen the entirety of the belly in some while now, but the impressive set of love handles that blimped out gave her a rough indication of how much ballast the Princess was continuing to accumulate.

Pressing her muscled form into Celestia’s doughy one, the Nightmare could get close enough to wrap her arms around Celestia’s back, partially enveloping herself into Celestia’s crevasse of ass cleavage. Hooking her sinewed arms under a pair of sloshing bingo wings, she found her prize: a pair of bloated tits, sloshing audibly with milk and fat. “Hmm hmm hmm… now what do we have here then?” She trailed off, fingers tracing around her areolas, squeezing and tugging at the fat nipples. A deep, wobbly moan left the sun princesses mouth as she forced another sticky mouthful inside, eyes rolling back as the Nightmare came in for another pull.

The stimulation was more than mutual, however. As her body was being enveloped into her sister's warm, doughy embrace, she revelled in the contact that for so long had been taken away from her. The Nightmare’s arousal had been steadily building too, the pair moaning in tandem from another rough grope, pink and white tit meat yielding to her firm ministering. “Yes… yes! Oh, by the gods this feels so… divine. I… I wonder which part of you is going to touch the ground first. Will it be your wide, wobbling derriere, or your gelatinous mound of lard you call a stomach?” With the words tantalising flitting through Celestia’s nogging, the mind magic sent a good dose of pleasure coursing through her.

Literally fighting against herself to retrieve more of the orgasmic dessert, Celestia was coming across a significant problem. “Ah… you're getting… so massive. We Alicorns may have great strength, but what use is it when you can’t bend anything at all? Oh… buck me, you're getting so big and fat!” Indeed, trying to balance the sheets of adipose swaddling her form was becoming rather tricky, her knees so encased in fat that any mobility was being sapped away, combined with the apron of belly flesh that sagged towards the floor, she was teetering, grunting and whimpering as she reached out for more. Willing herself forward, the world seemed as though it was in slow motion. Pushing just a little extra weight forwards, she was able to grab at the piece in front of her. The achievement was short lived, however. Now out of balance, she toppled forwards, letting out a small shout of panic as she fell onto the floor. The sudden, hard impact expected never came, as her immense belly provided an ample cushion, blorping and gurgling from the impact as the leftover cake on the floor was squashed under her.

The Nightmare just stood back, admiring her corruption over her sister's form, suppressing a biting cackle as Celestia continued to consume, pressing her face into cake, weakly sloshing her over encumbered arms around. Even in such a compromising pose, belly down on the floor and feasting like a farmyard animal, she continued on. The only thing she felt was a sense of relief, having finally taken such extreme weight off her hooves, content to use her own built-in mattress of flesh as it grew and grew below her, steadily oozing its way outwards. No thoughts, other than to eat and keep growing bigger and bigger. “And to think, this is only the beginning sister. You’ve only managed to eat a small part of a greater whole. You’ve still got plenty more left before you can even consider being done.” Bending over, she filled her hand with a great glob of Celestias back fat, gently squeezing the warm lump.

Slowly, a series of whines reached her ears. Looking up, Celestia was weakly reaching out with her arms, the massive sheets of arm fat sloshing as she attempted to grab anything edible. Already, she’d managed to clear out all the cake and icing she could reach, but the corruption on her mind forced her to seek out more. Alas, pinned down by a prison of her own flesh, she could do nothing but grumble and whine like a spoiled child. The food was right in front of her, but in her immobilised state, it may as well have been on the other side of Equestria. “Aww, can’t Celly piggy reach, mayhap some piggy let themselves go a little too much?” Celestia continued to struggle, trying to crawl and push her colossal bulk, instead only managing to jiggle around. The Nightmare’s magic lit up as several items levitated in her cool blue magic.

“Well, I can’t say I blame you, all that delicious, mouth-watering cake, just out of reach. Don’t worry, I’ll help you out. It'd be cruel to deny you the pleasure of pure, unfettered consumption.” Nightmare placed down a massive metal trough in front of Celestia, clanging onto the stone flooring, using her magic to adjust Celestia’s position, the Nightmare then began to tear chunks of cake loose, dumping them into the basin. A small, unprincesslike squeal left Celestia’s lips as she dipped her head in, tearing into the offerings with gusto. Further manipulating her magic, a pair of hoses drifted over and hung above the trough. With a slight grumble, they came to life, one dripping with thick cream, the other with melted chocolate. Pooling inside, they mixed with the cake already there, the basin filling up with a calorific sludge.

“After having all that cake, I thought you’d need a little something to help wash it all down with. And what better way of serving it to you than a hog's favourite thing to eat out of? Just keep eating, and I’ll keep adding more and more. You’ve still got a way to go…” The Nightmare trailed off, focusing back on her task she deposited enormous helpings into the trough. Already, the brown and white slop was plastered on her face, her enormous cheeks, jowls and chins splattered in the gunk as she continued to glut. In it’s semi liquid state, it was even easier to chew and swallow than before, Celestia’s gut working overtime to process it all. Grunting and snorting, belches escaped between every few mouthfuls. And as she grew, the cake slowly shrank that little bit more. Even so, she’d only made a proportionally small hole in the side, and there were still literal tons of delicious, fattening cake.

“There’s still so much to eat my tubby sow. But you're still far too skinny, my, you’re practically wasting away. By the time you're done, it’ll make your current size look practically anorexic. So, I hope you’re hungry…” Celestia said nothing, for her mouth was overflowing with calorific sludge. With the magic permeating her mind, there was nothing but simple commands to eat, chew and swallow. Not caring as her belly outsized jumbo bean bags, not caring as her enormous ass could have oozed off the edge of her bed. Just hoggish delight in gorging herself and adding more and more pounds to her already adipose ladened frame, struggling to find any more room to cram any new fat.

“Now, who’s ready for more?”

Chapter 2

Twilight cautiously edged around another corner, trotting into another dilapidated corridor. Behind her, a small procession of five mares followed, determination apparent upon each of their faces as they joined her, small clouds of dust erupting with a hoof fall. Held in a sparkling purple field, five stone orbs drifted around them, each inscribed with a unique symbol. Wandering around the abandoned halls of the ancient castle was certainly a strange experience, made all the more bizarre by the utter lack of any opposition inside.

“Ya know what Twilight? I’m rather missing being back in the Everfree.” Applejack mused, taking a few glances out of the smashed window beside her, pale moonlight streaming through the stained shards.

“Really AJ? We couldn’t go like 5 minutes without something going wrong, how could this place be any worse?” Rainbow Dash responded with incredulity, lazily flapping her wings as she hovered a few meters above the ground.

“Well sure Dash, but at least we knew there would be something strange here and there. Ever since we went inside, not a single thing has happened. Puts me on edge, ya know.”

“Ooh, I know exactly what you mean, Applejack. It’s so cold and dark in here, at least in the forest there were all those nice critters.” Fluttershy agreed, hanging back just a little from the main group.

“Regardless, the Nightmare is still here somewhere. If I had to guess, she may be preparing herself for when we arrive.” Twilight cut through, grunting as she hefted the stone orbs.

“Now that is a scary thought darling, I hope you have a plan when we get there.” Rarity commented, a twinge of panic undercutting her voice. Twilight shook her head, a small grin flashing on her muzzle.

“Don’t worry Rarity. I just know the elements are still here. I have a sneaking suspicion that we’ll unlock them when we find the Nightmare, whatever ‘spark’ the book was talking about will come to light.” Rarity wasn’t quite sure if she believed that was entirely true. However, Twilight did sound rather confident in her convictions, and it wasn’t like they had any other option. Silently nodding, they approached a set of spiral stairs.

Then, they felt… something. In the stone below, they felt a strange rumble and rocking. “Hey guys, why’d you stop?” Rainbow paused, looking back at the group, all five had stopped, looking around in confusion, a few puffs of dust flaking from the ceiling.

“I… I don’t know. Maybe an earthquake, I guess?”

“Nah. If it was an earthquake, my tail would be going all spiky and my hooves all ticklish.” Pinkie spoke matter of factly, drawing an incredulous look from Twilight.

“Wha… Pinkie that makes no…”

“Don’t question it Twi. Besides, you’ve got better things to be worrying about in your egghead noggin than to be worrying about the Pinkie Sense.”

“Yeah. Besides, you’ll have an entire episode for that anyways.”

“Uh huh... Well anyways, whatever that was, felt pretty close to me. I reckon it’s probably up there… whatever the hay made that.” Applejack steered the conversation back on track. They nodded, stepping onto the worn stone blocks, working their way upwards. As they climbed, the same strange rumble came again, growing stronger with each meter ascended. Soon enough, a whole spectrum of other sounds joined in; a growling, blorping noise that was quite unlike anything they’d heard before. That was mixed with a sweet scent that permeated the very air Twilight breathed, quickly overtaking the smell of damp and decay. The smell alone was enough to remind her that she hadn’t eaten anything at the surprise party, setting her belly gurgling. Finally, the opening was in sight, Twilight motioning with her hand, all of them huddling together.

“Right, we’ll all go in together, but be quiet. I have no idea what Nightmare Moon is doing, but if she’s distracted, we might be able to get the jump on her.” They nodded, some more enthusiastic than others. “Great, let’s do it!” Creeping over the last few steps, they all stopped in shock. Filling a good portion of the room was an object of considerable proportions. It was the colour of fresh snow, the great sloping, overlapping swells and curves giving it the appearance of rolling hills in the winter.

Looking closer, one could begin to see several peculiarities. For one, two misshapen orbs stuck out on the blob's front, the ends capped by light pink ovoid’s. Their eyes travelled around the immense mass, taking in the overlapping nature of the great sagging masses as they fought against gravity. Looking to the side, however, they spotted something amiss. Upon a side of a roughly spherical mound, they spotted a strange image. A yellow-coloured mass, bigger than a goods cart, with a distinct radial pattern curving into a stylized image of the sun. An involuntary gasp left Twilights lips as she spotted it, the dots suddenly connecting in her mind.

Suddenly, another groan and grumble rumbled forth from the mountainous monarch, followed by the sounds of heavy swallowing and gulping. Soon, the others were putting the clues together, a mixture of emotions working their way onto their faces as it dawned on them that this room filling mass of white blubber was, at one point, Princess Celestia. Her gut sprawled out in front of her like a tidal wave of pure fat, her immense jelly belly formed of rolls thicker than entire beds, stacked atop each other haphazardly. Where her belly button was, was now a literal chasm that could swallow up the group whole, with plenty of room to spare. Those immense rolls battened forth, creating the ultimate set of love handles that oozed from her side, almost managing to cover up the great spherical stacks her legs had regressed into.

Once slender and graceful, those limbs had been turned into nothing more than useless piles of adipose, too stiff and encumbered to move even an inch, just acting as more storage for the deluge of fat blanketing her figure. Moving past the mammoth breasts puffing out on her chest, what could only be assumed were her arms. Like with her legs, each had been turned into a concentric stack of flab as each section ballooned out to absurd proportions. Her bingo wings were easily as wide as her wing spawn, the heavy sacks of flesh drooping onto her countless side rolls, jiggling with every miniscule movement she made.

Moving to the side, Twilight watched as more and more of Celestias butt came into view, and found it impossible to match with anything on a living creature. Swollen to such an absurd size, they’d been forced to accommodate tons of soft, malleable flab apiece, each blob of booty blubber covered by endless rolls and creases that distorted her sun cutie marks into uneven smears. Cellulite dimples were liberally dotted across her vast, sagging plot, folds festooned with the marks could be found wherever she looked. Rolls were stacked atop even thicker folds, overlapping in great discordant swaths as every inch of soft, undulating adipose fought for any available space. Pushed upwards by the tons of fatty flesh, she was all but impossible to ignore the mountain of a mare.

A monarch turned mountain, the thought rolled around Twilights head as she tried to plot out the idea; trying to deny the fact her mentor literally outsized houses outweigh the entire population of Ponyville. Through the cacophonous choir of stomach noise and consumption, she could hear somepony else, somepony very familiar. “My my, I knew you were a talented pony, but I never expected you to have the makings of an eating contest champion. You’ve eaten everything, the entirety of that enormous cake, now resting in this wonderful belly you’ve grown.” There was a pause, and the mane 6 watched as Nightmare Moon wandered into view, her bare bottom facing towards them as her ethereal tale swished back and forth excitedly.

“Oh, and how delightful it all is. An ocean of soft, plush princess meat to lay upon. I can’t imagine how comfy you are, surrounded by meters worth of delectable flab, wallowing in your obesity, as carefree as a pig and a mud pit.” The only response she got was a few deep groans, Celestia’s mind too overburdened by magic and hormones to think rationally. She only felt pleasure; her meters upon meters of flesh pressing against itself and the ground, the cream and chocolate being pumped into her mouth, the Nightmare sinking into her body. Another pulse of magic, and she moaned once again, eyes rolling back as another orgasm rocked her body, setting off a chain reaction of undulation through her form. Down below, her gigantic thighs and fupa were slickened by another burst of mare cum.

The Nightmare bit her lip, teasing her own sex as she leaned down towards Celestia’s face. Her head, just like the rest of her body, was packed with hundreds upon hundreds of useless pounds. Immense cheeks blimped out, resting upon the immense collar of adipose her neck had morphed into, melding and mingling with a stack of chins reminiscent of a waterfall. Her back fat was beginning to pile up significantly, threatening to ride up the back of her head. Between her lips, the two hoses had been neatly jammed in, thin trails of each liquid dripping onto her face and pooling slightly between each fold they trickled over.

With a yank, she pulled both tubes free, tossing them over her shoulder as their contents spilled out across Celestia’s bulk. Before Celestia could complain, Nightmare pressed her lips to Celestia’s own. Splaying her legs against the cascade of rolls, the Nightmare began to buck her hips back and forth, grinding her vag against the soft, pliable blubber as her tongue mingled with Celestia’s. Her hands roamed across the landscape of adipose, groping and squeezing at anything she could get her hands on. As greedily as the blob she lay upon, she mashed her face between those elephantine cheeks, moaning as her sex throbbed, slamming her hips into the cushioning flab. So vigorous was her Prench kiss, their horns occasionally collided with one another, adding to the menagerie of sounds filling the room. “Yes… Yes!!! I’ve waited so long for this! Mmm, nnrrgghhh… you fat cow, you mountain of porcine pounds, you’re nothing but a mockery… aahhh… such a blob… such a useless pile of lard… only good for eating… ooooohhh how I’ve ruined your body… ahh mmmhh… so big, so soft… so bucking fat!!!” With a final slam of her cunt into the soft embrace of her most hated enemy, she let out a loud gasp, moaning as she came.

Gasping, she rolled onto her back, her chest rising and falling as she laid back into Celestia’s flesh. Closing her eyes, she smiled in the afterglow, gazing up at the cold stone above her. She felt content, though she was noticing something was amiss. Nightmare Moon’s eyes slowly moved over to the hallway, eyes widening in shock as she saw six mares looking up at her in a mixture of anger, disgust, and a slight bit of arousal. Completely bereft of armour, her mane disheveled, and a mixture of half-eaten food, sweat and sexual fluid covering her, she was a far cry from her appearance at the town hall. More to the point, she noticed that a set of multicoloured jewels were orbiting around the group, forming into a set of stylish necklaces and a crown.

All she could do was sheepishly smile, sparks of rainbow energy building up. As the energy wave arched over and crashed down upon her, only one thing popped into her mind as the cleansing magic washed over her.

“Totally worth it!”

Chapter 3

The sound of applause rang through Ponyville. After the traumatic events of the night, order had been restored to Equestria. The sun shone in the sky, casting its warm rays across the landscape, glinting off spotless windows and glossy balloons alike. Music drifted through the streets as streamers and confetti drifted from the skies above. It was a proper Pinkie Pie party, with both refreshment and merriment in good supply.

“Well, I’m sure glad that’s all over. I think I’m just about beat!” Applejack smiled, looking across at the group of ponies she’d gotten far closer too. All of them were relieved, happy that the whole Nightmare problem had been dealt with. Still though, after a night of adventuring through the dangers of the Everfree, the sight that had greeted them at the end was… difficult to shake. Almost unanimously, they’d decided to clam up about the whole thing, the only exception possibly being Pinkie… one of the few who hadn’t looked utterly horrified.

Twilight, on the other hand, looked far worse for wear than the others, trying to keep a straight face. “Say Twilight, what’s the matter?”

Twilight jumped at her question, sighing as she walked over. “Well… quite a lot of things, to be honest. As you’ve probably realised, I’m not exactly the most sociable of mares. This whole experience has really opened my eyes to the world around me, and the value that friendship has. You, and everypony else means a lot to me, and now my task in Ponyville is finished… well, I’m going to be heading back to Canterlot.”

“Send you back? Darling, I may not know too much about… Celes… the Princess. But I know she’s a very kind mare. You were sent to Ponyville to make friends? It would be rather harsh just to send you back there by yourself, I’m sure she won’t just take you away.”

“Are… are you girls sure?”

“Sure as the Wonderbolts are cool!” Rainbow Dash shouted, earning a few chuckles and eye rolls. Twilight’s expression lightened, but still wasn’t a full smile.

“Let me guess sugar cube, it’s Celestia herself?”

“How could I not? I’ve known her for years, and in all that time, she always had a level of control, always had a grasp on any situation. Then the one day she disappears, she ends up becoming… massive. After the elements hit her and the Nightmare, she looked really out of it. I hope she feels alright.”

“Um… well Twilight, I don’t think you’ll have to wait long.” Fluttershy broke in, gesturing with a hand towards a large group of guards pushing their way into the crowd. Forming two lines, they cleared the entire road, practically clearing most of the town square, very much to the indignation of the party goers. Slowly, the sounds of partying diminished, everyponies attention drawn to the street. A cart, apparently made from several heavy goods carts haphazardly welded together, trundled into view. At least a dozen well-built stallions were hitched to the front, their bulging muscles straining to move the buggy any faster than walking speed. On the back of the absurd contraption, Celestia, still looking like an immense dollop of partially melted vanilla ice cream.

Her form had been partially clothed, with a bra/top made from several tablecloths wrapped around her upper torso, offering a very slight bit of decency, though offset by the twin mountains her ass had ballooned into. Her entire building-sized body jiggled and wobbled where she sat, creating a rather hypnotic dance of flesh as it slapped and smacked together, producing juicy claps with every impact. Ever with the Frankenstein cart, it still wasn’t quite big enough to hold the blimp of blubber, as great folds and rolls oozed over the sides like bread rising in a tin. Celestia’s head wasn’t even visible from where most ponies stood, only catching a glimpse of her ethereal mane billowing out with the wind.

So occupied with the gargantuan mass Celestia was, one could easily miss the tiny carriage pulled beside Celestia’s, a rather pensive and guilty looking Luna sitting inside, trying to avoid eye contact with everyone, and trying especially hard to look away from her sister. Stopping in the middle of the square, an uneasy silence filled the air. Suddenly, Twilight felt magic wrap around her body, lifting her into the air and towards the top of the blob. Simultaneously, the rest of the Mane 6, Luna and Spike were lifted up, carefully placed around her head.

“P… princess. Are you… are you ok?” Twilight nervously broke in, simultaneously setting off a great number of whispers, Spike being amongst them.

“Wait… we’re standing on Celestia? How… how did she get so big?” He mused, poking and prodding the swell of fat he was currently sitting on.

“Yes Twilight, I’m more than fine. I’ll admit, I’m still a little woozy from the Nightmare’s magic, but I’m feeling much more like myself now. My weight gain doesn't look too noticeable, does it?” Celestia grinned, winking knowingly.

“But Sister, thou art so large! This is our fault, is it not? We must try to find…” Luna spoke up, her grief-stricken voice cut off.

“No, Luna. I already told you… this isn’t your fault. You’ve been a prisoner of your own body, the Nightmare hijacking and corrupting everything good inside. The actions are those of the Nightmare, not of your own. Besides, I must confess that I’m very much enjoying this new form.” Silence again, broken by Twilight stammering.

“What… Princess, you can’t be serious. How can you like being this… fat.” A light titter left Celestia’s lips, jiggling her form slightly.

“I know this may be hard to believe Twilight, but I’ve never fully been happy with my body. I suppose you’ve seen in the tabloids about my eating habits. As tacky as those things are, they aren’t false by any means. I’ve always liked to indulge, though far less than I’d like. I’ve always needed to keep up a trim figure, lest Kibitz and the others get on my case. Now… I finally feel like I can let loose and enjoy myself.”

“But Sister, thou art the size of a leviathan, how does one expect to rule in such a condition?”

“I’ll find a way Sister.” She said with finality, confidence filling her words, just as the deep, bassy rumble of her belly cut in. “We’ll finish this conversation later… I’m feeling rather ravenous now, does anypony know where I can get some cake?”

“Ooh! I know exactly where, Princess!” Pinkie piped up with enthusiasm, her own smile matching the Princess’s greedy one.

“Excellent. For starters, I’ll need around a dozen assorted cakes, at least birthday cake sized please. I think that may just take the edge off my hunger…”