Prince Luna Straight Drownin' In Mares 2: The Terrible Return Of Nightmare Moon

by Frocto

Rating: mature
Tags: Princess Celestia, Alternate Universe, Anthro, Main 6, Nightmare Moon, Princess Luna, Trixie, My Little Pony: Friendship is Magic, Sex
Length: 12759

Prince Luna plans a counter-offensive against his bullying older sister.

Prince Luna becomes impatient with his slow progress in restoring the power of Nightmare Moon, and enacts a plan that will ultimately lead to him challenging his sister for rulership of Equestria.

Contains harems, impregnation/breeding, transformation and a very heavy focus on the sexual antics of a genderbent Princess Luna.

The first two chapters of this story were co-written with the lovely Unideal. Editing by the lovely Troublesome Beast.

This story is cancelled for the time being! More info here.

Published 2016-08-30 21:50:02 UTC
Last updated 2016-09-19 02:55:47 UTC

Trixie's Scheme

Author's Note

This chapter is a cute little plotting piece consisting almost entirely of Luna, Rarity, Trixie and Twilight lazing around Luna's bedroom, and was one of my favourite character pieces to write for the whole story.

Trixie's Scheme

The mysterious, inky-black night sky of Equestria. Where one might expect just endless dark, the vista seemed to come together with as daring a design as any Canterlot artist could have dreamt. Soft, generous moonlight raced along the clouds, fracturing into a pale spectrum of quiet energy. Splashes of white color lashed across a dark blue canvas, upon which the great glow of Equestria's pockmarked moon was, quite fittingly, the centerpiece. Everything was in its place and in accord.

As befit a work of art of such celestial magnitude, illumination was provided by thousandfold stars of all shapes and sizes. Dwarf and giant stars alike shone their light down from on high, racing through their lifespans as they formed and dissolved in tandem. Deeper still, a mysterious nebula swirled within the recesses of the star-speckled night.

All at once, the Night, in all its great majesty, shifted. It inched slightly to the right. A cooing voice seemed to come from far away: "Oh, you poor dear... Just look at how bothered he is, girls!"

A great set of white-hued fingers, with glossy purple fingernails all perfectly-painted, suddenly split that very same night sky wide open with cataclysmic gentleness. Galaxies were driven to either side as they weaved down across the great universe.

"Heavens alone know what could be responsible for this... I'm just relieved we're here to take care of it for him!"

Those lustrous fingers wound all the way down to the deep, dark base of the night. Finding the back of a head, they closed around it, cradling gently, and with genuine warmth. The night felt peace tinged with swelling relief. It night continued to shift, a hundred stars dropping from its underside and vanishing from reality.

A great milky-white pair of breasts were suddenly freed from once-concealing confines, to be dangled heavily across the inky blackness that formed all existence. Creamy flesh oozed across the surfaces of a hundred or more suns, yet it did not burn. Sky-blue nipples rose ever upwards.

Finally, the great night was drawn apart. From within the splashes of color, light, and the motion of a galaxy beginning and ending perpetually, a wet little mouth emerged. It opened, and a pink tongue waggled from within its depths, naturally guided to those nipples...

Luna came to rest on the great dome of Rarity's belly, dimly aware of the young foals kicking and squirming within its depths. She adoringly drew his gorgeous mane slightly back from his pretty face a little bit more, and more of the white bedsheets began to become visible under the most beautiful landscape painting in all the world.

"Don't you worry one bit, sweetie... Mommy Rarity will, hnnnn, take care of everything. My, you are stiff down here, aren't you?"

She glanced up at Twilight and Trixie with a cheeky grin as she sat on the royal bed, Luna's head in her lap and her fingertips slithering up and down the poor little prince's painfully-erect pole.

The midnight blue-hued boy looked the picture of malady. His head was tilted back, eyes closed and face flushed. His mouth was open, but teeth held tightly together. The sweat-soaked noble writhed on the bed, shaking hands not knowing where to settle; back arched and dark nipples stiff on his flat little chest.

It was a mesmerizing sight for the onlooking members of the Prince's great harem. Each muscle on his body was tight and corded, with a well-defined and firm belly, shoulder muscles forming a tight "V" around his throat. His chest, from throat to the definition of his pubis, was an artistically arranged pattern of rich, ripe muscles, toned as well as any swimmer's physique. In fact, the only part of him still full, fat, and luscious were his flaring, almost feminine hips, leading into a plump, squeezable ass.

And his shuddering gasps when she stroked the fat, drooling cock that had made them all mothers-to-be simply had to be heard to be believed! Few women could be expected to keep their decorum around such a vulnerable, sensual, adorable display~

He'd been tossing his head at first, but now he was slowly beginning to settle, if not rest, against Rarity. It didn't take much longer before he began to quietly suckle from the milky dilettante.

Rarity smiled at Twilight's disbelief and Trixie's familiar frustration. "What? Oh. Yes, of course I'll hear what his problem is in just a moment, darlings, but you can hardly expect me to believe this doesn't need taking care of!"

Surrounded by such a generous bounty of warm, loving attention and supple female flesh, Prince Luna soon relaxed. His eyes widened when he tried to speak: no words came out, but a stream of Rarity’s delicious milk was pouring in. He worked his deft tongue gently around her swollen nipple, savoring the intoxicating sensation of her sugary sweetness flowing into his belly, combined with the pillow-like softness of her majestic tits. A few more mouthfuls, just to start him off. After all, she wouldn’t mind. Especially judging by the sound of those cooing moans coming from above.

Eventually he managed to tear himself away, with no small regret. Luna released her nipple with a gentle wet pop, and Rarity purred with delight. She adored seeing her little Prince’s face in repose, his cheeks shining with a red-hot blush, his fingers moving to wipe the last few trickles of milk and drool from his divine mouth. No doubt she thought him a sweet little prince who’d allowed himself to get a teensy bit too messy. But he could hardly be blamed for his table manners. She’d helped herself when he was as vulnerable as a colt, it was hardly even fair!

“Hnnn... We do not need to be pampered so...” he whined, nevertheless snuggling deeper into Rarity’s matronly curves.

“Don’t you?” Trixie said, sitting herself down on the bed. The mattress creaked and cratered under her generously jiggly blue rear, tilting Luna ever so slightly toward her. “With all that twisting and turning you were doing, Trixie could hardly tell!”

“You did look a bit upset, darling,” Rarity cooed, wrapping an arm possessively around her petite prince. Her breasts pancaked insistently on his back, the points of her nipples digging ever so slightly into his skin. “Why not tell us what’s wrong?”

“We... ” Luna’s face turned a brighter shade, and then even moreso when Rarity’s hand resumed her harem duty, stroking his slick, sticky shaft.

“We do not know what thou speakest of!” he insisted. “We raised the moon at precisely the right time and precisely the right brightness, with no difficulties. Nothing is wrong whatsoever!”

He squirmed under their eyes. “And whatever Our sister has told you are the purest of falsehoods!”

“Your sister, mm?” Rarity teased, her skilled hand working ever so slightly faster. “None of us mentioned Celestia at all, did we?”

She turned to the others. “Girls?”

“Not I!” Trixie said, making herself comfortable on the bed. She pressed her softness up against Luna’s fluttering chest, sandwiching him between two marvelously well-endowed mares. The space between them was getting all sorts of wonderfully sweaty and slippery, the bed becoming more humid by the moment. “Did you, Twilight?”

“Certainly not,” Twilight said. She was breathing hard, breasts wobbling ever so slightly as she gulped down huge breaths of air, coincidentally helping herself to Prince Luna's intensely-pleasing, hypnotizing scent. There were a few soft thump-thumps as she shifted fitfully on her hooves, pounding them on the carpet. It was beyond obvious that she wanted in on the party, if only the bed could support a third mare. “So, by simple deduction, that must be the problem.”

“How dare you! Questioning Us in such a fashion! We... hnn... We are The Night!” huffed Luna, but to little effect. It was hard to sound intimidating when his words were broken up by heated, horny little slut-like moans. Movement between Rarity and Trixie was nigh-on impossible, and even the hint of a struggle to escape from the two slippery mares merely earned him a chorus of pleasant sighs. “And even if she does employ the sun-emblazoned posterior against Us, attempting to lure Us by wobbling around in those ridiculous outfits, what of it?”

“Well…” Twilight found her hands increasingly busy roaming across her needy body. She teased herself all over, hands most of all lingering on her thick inner thighs. There were lots of fun spots to touch and prod down there under the shadow of her fat purple pussy. She wasn’t first in line for some fun with the Prince, but clearly she wanted to get herself ready for him. “That confirms it, girls! We suspected as much. Nightmare Moon’s power is already growing in him, and Celestia knows!”

Rarity and Trixie could hardly believe their big floppy ears. They had, after all, been told that was the entire purpose of this experiment, but they hadn't even mothered a few foals yet! In their minds, it had been years and years away. Perhaps even decades.

Their dumbfounded gazes turned away from Twilight and towards each other, the pair of unicorns saucer-eyed over their combined squeezed-together racks. Their bosoms slapped together around Luna's head with a loud series of claps that made his ears ring... right before they cut out all light and sound.

With Trixie and Rares now fully facing each other, there was absolutely no room for Luna to escape. Those earthquake-causing tits, individually massive, had the total combined weight of another whole mare, and that weight was now pressing almost solely on his shoulders. He buckled, sagged, then finally surrendered with a little sigh~

"Nightmare Moon?" gasped Rarity. Her hand shot up to that captivating mouth of hers, fingertips dimpling her smooth skin. “You can’t mean - ”

"Already? But... But Trixie is not adequately prepared for... for something like that!"

"Well, like it or not, it's coming, girls!” Twilight nodded solemnly. “And we need to be ready to handle it."

"Oh come now, Twilight! You sound like you're talking about one of our Cutie Map missions. This is Prince Luna we're talking about, not some big scary monster~"

While the other girls were talking, Trixie was free to walk her fingers down Luna's exquisite abs, eventually finding her way to that intensely hot and drool-worthy member. Yes, this shaft above all others! A truly fearsome and admirable weapon, it had even rendered one as great and powerful as her heavily pregnant, laden with the foals of the royal family.

And it had certainly cast its seductive spell over Rarity; even as she carried on her casual conversation with Twilight, it wasn't like she'd stopped paying Luna's shaft the attention it richly deserved. The steady flow of slick precum down the shaft had left the curvaceous mare's fingers and palm glistening, and she was working on massaging every last drop of Luna's seed back into the night-black skin of his own member. She only paused her instinctive pumping of that strong, royal member to waggle her fingers along his medial ring and occasionally prickle the fat cock with her nails. That always made it twitch... and fatten up all the bigger and angrier.

Trixie smirked self-righteously at that. Every time Rarity sank a nail briefly into the tense skin, that amazing cock took to twitching in the most delightful fashion. Maybe if that silly boutique-loving mare teased it too much, she’d get an early taste of that evil power they were discussing!

Luna might have been as cute as a button but there was no mistaking that this behemoth had once dangled between the legs of a genuine Devil God. On the long-haired beauty's slender, girlish frame, that vein-mapped god-rod of unchallenged filly enslavement looked almost comical - like what one would get if they placed Big Mac's member on Pipsqueak's body, with the prick very much leading the effeminate stallion, rather than being carried by him!

It didn't take long for Trixie's deft hand to join Rarity's between his legs. With the talented dressmaker already fisting the shaft, the great magician instead chose to draw light circles around his frenulum with magic-dripping fingers, working adoration and enchantment into that gorgeous cockflesh! Soon they were rubbing opposite sides, his overstuffed balls hunching up under the base... He'd be popping any second now!

Twilight continued her lecture while her friends devotedly worked on helping their perfectly-pretty lover to a spectacular finish. Trixie subtly aimed it downwards, hoping he might fire his rich blessings with enough force to leave that fat-reared bookworm dripping... What was five or so feet in distance for an Alicorn’s mighty member?

"Now, as I was saying, Prince Luna's power is growing. The, ah, sense of... let’s be polite and say “ownership”... we've been nurturing and nourishing is the key to unlocking his potential. It’s the whole goal of this project, after all. But at the same time, it could get dangerous if we allow it to go overboard. Princess Celestia's teasing is... well, it’s complicating everything!"

Trixie was surprised Twilight could keep her cool so well under the circumstances. Surely Prince Luna's lovely prick and princely pheromones would be wearing down her defenses by now: even if Twilight looked calm on the outside, she would be mooing like a cow on the inside.

"Darling, Celestia is doing it on purpose. Deliberately! With every intention!" Rarity's hand was pistoning faster now, her eyes occasionally darting down to re-experience her cock-shock over and over. Whenever she caught a glimpse of Luna's member, the bubble-brained filly could barely resist licking her lips, tasting his scent on the air. "Trixie, darling, he's going to bloo~oow..."

"Rarity is more than right, Crylight Sparkle! Celestia wants to see for herself if Luna is enough of a stallion to take what he wants! I can sympathize with the urge to see something so miraculous, so delicious, and not be able to have it... Ooh, thoughts like that just make me wish I could unload all my frustration somehow! And make a big, gooey mess doing it!" She was drawing circles around his cocktip faster than ever now, fingers sparking with magic. There was so much frothy white seed oozing from the tip that her fingers were soaking, squishing wetly on each circuit.

Rarity and Trixie both had their eyes locked on Luna's big shaft now. Their mouths were hanging open in awe, drool leaking from the corners of their lips.

Twilight had a feeling she'd best wrap this conversation up before things got out of hand. Well, further out of hand.

“The point is that we have to put a stop to this immediately!” Twilight said, even as she dutifully restrained her own gaze from the Prince’s throbbing… pulsating… gorgeous... cock. She needed to be of sound mind right now, and that would simply be impossible if she wound up mesmerized by his hypnotic,bobbing member! “Prince Luna needs to… unhhh.. tell Celestia to stop whatever she’s doing, or there could be some very-- oh~!-- dire consequences.”

She clenched her fists together at the same time she did her thighs. Her waggling butt was outthrust, and swinging from side to side. “He has to stand up to her!”

Luna finally freed enough of his head from those large, sweaty bosoms to join the conversation. He rested his slender hands on the pair's juicy booties, pushing into their rich squish to force his way upwards. “We are trying, it is just...” His overwhelming orgasm was approaching even faster as fantasies of his lusciously lusty sister filled his head. “To not put so fine a point upon it, even the darkest most fearsome Night, in all his eminence, barely stands level with her chest!”

Truly, brazen Celestia could make any pony feel short, but next to cute little Luna she positively towered. Other ponies could rave for days about her beautiful face - those full cheeks and pouty eyes - but Luna had to turn his eyes upwards just to see her titanic chest. Mouthwatering tits the size of his head, plush white breastflesh as pure and radiant as the sun itself. His hips bucked feebly as another fevered moan escaped his soft lips. He shut his eyes tight, trying to force the thoughts from his head. He was imagining her again!

And how could he not? Big, ‘clumsy’ Celestia, always walking into him by accident, her generous, jiggly curves bowling him over with barely more than a giggled apology - at best! She never seemed further than an accidental grope away, close enough for him to breathe in her rose-scented perfume - under which steamed and fumed the potent scent of a mare’s undeniable sexual need. No amount of perfume could hide that.

He knew she had to be teasing him. Taunting him with the prospect of bedding Equestria’s most eligible goddess. It was nigh-on cheating! How could he resist her erotic wiles when she was so big, so overwhelming, so… everywhere?

The thought alone might have been enough to send him over the edge, but it was accompanied by plenty of generous assistance from Rarity and Trixie. It felt like a dam bursting, a wave of blissful release washing over his mind. His every muscle tensed as rope after rope of creamy white cum gushed from his broad tip. Most of the steamy load arced upward, hanging briefly in the air before it splattered messily back down on the bed. Having already buried Luna in a pile of jiggling mare flesh, Trixie and Rarity took the brunt of it, something they were more than grateful for, the perverts! They giggled as it soaked their luscious bodies, rubbing it in like finest lotion. The sheer output of a single messy orgasm was more than enough of a vivid reminder of Luna’s burgeoning virility.

Not even Twilight was safe - though it wasn’t as if she’d tried to be. Big dollops of Luna’s gooey seed coated her easily, her fur more white than purple. A questing finger dabbed itself in a puddle of warm alicorn seed, leading a strand up to her eager, trembling lips. “Mm…”

Only once little Luna had poured every last drop of his extraordinarily virile ejaculate all over silken bedsheets and horny ponies alike, did Trixie and Rarity finally unstick their slippery, cum-soaked fingers from around that magnificent pole. With eyes wide and mouths still hanging open, they watched the bobbing length in fascination

Without soft, feminine palms supporting the heft of the veiny shaft, endless inches of equine erection lolled immediately forward. It swayed drunkenly downwards, pulled to the bed by the weight of its own heavy flared head, where it continued to drool even more seed into an obscene pool of Prince-spunk.

Trixie and Rarity exchanged truly corrupt smiles, then took those boy-molesting hands of theirs and simultaneously trailed them up Luna's black-hued chest. After such a powerful orgasm, he was helpless and defenseless: it was no surprise when their fingers took to lightly scratching the Prince's mesmerizing body, teasing just enough to make him writhe sleepily, displaying his model-like form for their hungry, female eyes.

"Hnnah... Our servants, please... mercy..." the spoilt boy huffed, little steam clouds forming with the heat of his breath.

Up they went, scritching along his taut, clenching belly all the way up to his neck, where the girls crossed hands before his eyes. Rarity tucked her spunk-dripping fingertips into Trixie's eager mouth, drawing an appreciative sigh as she tightened up around them. Trixie closed her eyes and breathed through her nose as sultry slurp-pops, and her appreciative moaning and humming, filled Luna's ears.

It was, Luna admitted, somewhat flattering. If very impertinent! They were like slutty sperm junkies~

Of course, Trixie was a tiny bit slower than lovely Generosity in returning the flavoured favour. Perhaps at first she had originally considered hogging every last drip-drop of gooey hot Alicorn seed to herself, but she finally yielded to the ministrations of Rarity's hungry tongue. It darted between Trixie’s fingers and scooped seed directly from the magician’s warm, inviting palms.

"Ooh... Sho tashty..." the porcelain pony cooed.

"Hmmhaah..." agreed Trixie.

The girls leaned closer and closer together, until mouths that had become steadily more limp with the act of swallowing addictingly sweet cum ended up together over Luna. With eyes hooded or altogether shut, Rarity and Trixie formed a tight seal with their mouths, tongues rolling and grinding together in the depths on that lewdly-shared girl-space. The ponies fluttered their eyelashes and rolled their eyes back, lost in delirious pleasure.

Big, bouncy breasts were once again over Luna, this time filling his whole lap with pony-chest as they shared a post-handjob make-out, soft mareflesh squeezing up against his stallionhood.

They might have gone on forever like that, savouring the taste of Lunar cum on each other's lips, if Twilight hadn't coughed politely. "Um. Girls? Celestia? Yes?"

The pony’s purple horn glowed, and both oversexed mares felt a light, but unyielding, magical tug on their manes. Gently, but insistently, Twilight prised the whining bitches apart. "Honestly! Can a pony get a little help here?"

“Oh, pipe down, Sparkle,” Trixie huffed, lamenting the poor atmosphere suddenly looming over her favourite restaurant. “We all heard you the first time. It’s a simple problem, really. So simple it’s hardly even worth thinking about.”

And then, Trixie said the words everyone would have more than enough time to fully regret later: “Why, Trixie already has a solution for it!”

The whole room fell silent. Rarity and Twilight curiously cocked their heads. Luna turned his gaze toward Trixie, a hopeful gleam in his lovely, misty aqua eyes. “Dost thou speakest truth?”

“But of course!” Trixie rolled herself over to the edge of the bed, her horn aglow. Up from under the mattress, a vial of something profoundly blue floated neatly into her hand. “The Great and Powerful Trixie always has a trick up her sleeve - even when she’s naked! I can, of course, recognize a power struggle from a mile away, so I had that zebra, Blecora, mix this little number for me!”

“That’s Zecora!” Twilight groaned, exasperated. “You see her every day!”

“Decor-a, yes, whatever.” Trixie waved her off impatiently. She floated the vial gently in front of Luna’s face, the potion swirling and sloshing inside. “My dear prince, it seems the problem here is simply one of stature! Even I, in all my majesty, have to admit that our fair Princess Celestia is no pony to sneeze at. Small wonder that you can’t confront her, if you can’t even look her in the eye.”

Luna flushed, irksome memories of his ungracefully oversized sister surfacing once more. It would help if he could meet her gaze at eye level, for once, without needing a stool. And cushions. How much easier it would be to confront her if he could stare at her face, instead of those plump, heaving tits, forced into whatever outrageous - and outrageously undersized! - outfits she’d chosen to tempt him with that day.

Luna forced the exquisite image of his sister’s divine swaying tits from his mind. “You have The Night’s full attention, Trixie! What does thy potion do?”

While their theatrically-minded marefriend swanned in the spotlight, Rarity and Twilight maintained deadpan poker faces. As long as Luna looked happy, they had no grounds to object to whatever harebrained scheme Trixie was cooking up juuust yet. Besides, who didn’t love Trixie when she was having one of her moments?

“It’s really quite simple,” Trixie said with a dramatic wave of her hand over the flask. “The potion is attuned to you, Prince Luna! It molds and shapes the body of any mare that drinks it to fit your deepest desires. It can make the smallest, most homely of lavender-colored ponies into a goddess made flesh! Or…” she grinned a devious grin and winked a devious wink. “It can take a goddess made flesh and give her the figure of a plain, modest mortal.”

Luna looked up at Trixie with wide, shining eyes. Here at last, a solution to all his woes! No more looking up at Celestia. No more of her ‘accidentally’ squishing his face into her suffocatingly soft chest. Day and night could, for the first time in all history, be of equal stature! And why stop there? All the centuries spent in Celestia’s long, hourglass-shaped shadow could not be so easily forgotten, after all. If he decided to feel especially vengeful about that, she could even stare up at him. How wonderful would that be, for his sister to be the smaller one for a change. Perhaps then she’d learn to treat him with the respect he was due.

“We approve!” He grinned eagerly, taking the vial carefully up in his hands, considering its contents. “Tell us, Trixie: for how long do the effects of this potion last?”

“Oh, forever, perhaps!” Trixie giggled, more than a little manic.

“It’s a very powerful potion, the zebra made that quite clear. But it shouldn’t be a problem for you, Prince Luna.” Her finger trailed itself gently over his chest. “You do have such a strong will, after all! If you ever get tired of seeing your sister so short, you need only change your deepest desire and she should return quite quickly to normal. Though, with mares like the Great and Powerful Trixie at your side, I can hardly imagine why you’d want that!”

"Trixie, we appreciate you wanting to help Luna, but this, ah... this all sounds very..." began Rarity, tapping her chin as she struggled to find just the right words.

"Underhanded?" suggested Twilight, with a glare.

"Manipulative?" Rarity tried, cocking her head.

"Oh, I have another! How about 'entirely banishment-worthy?'" Twilight drolled.

"Quite so!" Rarity folded her arms under her magnificent bust. She nodded her head sagely. “If something went wrong, the consequences could be absolutely dire!”

Trixie cut her off with a smug sneer. “More dire than the reincarnation of Nightmare Moon? Mmm? Now still your boorish babbling, country bumpkins. Let true magic unfold!"

The fashionista blanched, cocking her head towards Prince Luna. "Come now, sweetie-darling, pay her no mind. While Trixie, aha, 'arguably' has the best intentions for you, wouldn't you prefer to just come to your dear, dear aunts whenever that big-breasted bully Celestia gets too much for you? We'll wring all the tension out of you, and dare I say it, provide some fabulous eye-candy while we’re at it~"

“But why bother with temporary solutions, when you can cut off the problem at its root?” Trixie rolled her sturdy shoulders, those pendulous, yet perky, teats rising proudly on her chest. Her candy-pink nipples certainly did have a way of dragging the eye down. And up. And down. "And you can be assured this plan will succeed, my prince!”

Trixie shuddered, apparently recalling some particularly vivid memories. “Trust me when I say I have no intention of returning to the stocks... Or the dunk tank... Or whatever other morbid humiliation devices that creepy Canterlot curmudgeon has devised since then."

“Well, there’s no doubt in my mind that Trixie has planned this all out perfectly,” Twilight said, rolling her eyes. “But-”

“But it’s Prince Luna’s decision, of course!” Trixie leaned close into Luna's side, wrapping her gloved arms tightly around behind his lithe neck. Her deft, dextrous hands massaged his upper back, teasing and tempting. "Princess Celestia will be so satisfied with her changes that she won’t even dream of pressing charges.” She grinned, her eyes gleaming beneath the brim of her crooked witch’s hat. The naughty pony narrowed her eyes, smirking at thoughts of her ultimate revenge on Celestia. “Who knows? Perhaps it will be what she’s always wanted!"

Rarity sagged, and Twilight tutted, her love of procedure momentarily working against her. "Well, it is ultimately up to Prince Luna, I suppose…” She turned to Luna, her lips pursed in a pleading pout. “We are merely his humble servants."

Luna leaned slowly into Trixie, relaxing into the wicked villainess' warm, cushiony embrace. Reformed or not, the showstopping mare’s sensationally sinuous curves simply had a knack for turning just about any situation into a steaming pot of trouble - and not always for her.

Enchanting, beguiling, and ensnaring were all words to describe her, Luna’s conscience reminded him. idly. Her Cutie Mark might have been better off as a straitjacket!

Still... he had to consider his options. He was smaller than Celestia, obviously, and only her equal in magic. Perhaps this was his only opportunity to get a leg up on her... And a leg over her. He blushed and wriggled as that mental image came to him in full, candid clarity. Celestia trapped under him, pleading helplessly for mercy... The moment stretched out little by little as he continued to be captivated. He’d never wanted anything so much!

His mind was made up. He had to do this, for the good of all of Equestria! He could feel the hearts and minds of all ponies uniting as one, all rising up towards this noble goal.

Well, that settled that. He coughed, ready to announce his decision. "We shall... deign to follow Trixie's recommendation."

“Oh, so soon, my prince?” Trixie could barely contain her hungry grin. "I should have thought you’d need more… mm... convincing. You know it's not even dinner time yet."

"Just give him the potion, Trixie," Twilight groaned, burying her face in her hands. “If we’re going to get banished for trying to turn the Princess into Luna’s sex toy, we may as well get it over with.”

Luna Watches The Sunrise

Luna’s private chambers were exactly how he liked them: quiet and dark. The only light and sound were both provided by the crackling heat of a solitary fireplace lurking amidst the comforting shadows.

The little prince himself was cozied up in his favorite chair, just barely small enough for the tip of his horn to peak over the cushy top. Luna was cradling a book, but not really reading it. He idly flipped the pages, alone and vulnerable in his own private chambers. This was a trap, and he was the bait.

Prince Luna’s ears perked as he heard the door opening, and then closing briefly after. He heard the soft thump, thump, thump of the tallest, curviest mare in all of Equestria lightly crushing the carpet underfoot. He was ready, he’d told himself a thousand times. He had the potion, he knew the script. All he had to do was convince his big sister to drink a little vial of ‘beauty enhancer’ and then everything would be set. He was ready.

Whumf. Luna winced as a pair of warm, pillowy breasts cradled his head from behind. The air was suddenly thick with the heady scent of Celestia.

“Eep!” the little prince squeaked.

Behind him, Celestia seductively leaned further down, the soft, all-enveloping embrace of her solar bust claiming more of his head.

Wait, no, upon reflection: he wasn’t ready for this. Not at all. “H-hello, Sister.”

“Good evening, Luna,” Celestia purred, searching hands weaving their way over his small shoulders. “I do believe... mmm... it’s about time I checked up on my favorite little princeling, don’t you? What’s that you’re reading there?”

“T-this?” Luna could feel his heart racing in his tight chest. Mentally, he had been prepared for this. Physically, he realized that nothing could ever prepare him for her. The mere sense of her, entering and flooding into the room, was absolutely overwhelming.

Luna groaned meekly as her supple hands started working away at him, her fingers teasing and probing the stresses in his shoulders… then slowly exploring lower and lower. Not two minutes of this, and his erection was already stirring in his pants. “This… this is merely light reading, sister! We have been hoping to catch up on the modern, um, literature.”

“Is that so?” In the blink of an eye, Celestia had circled around the chair, stalking him like a hungry pony might a hayburger.

Celestia loomed over Luna. Her presence was so great, so willful, that the Goddess seemed to fill up the entire room. First, there was the physical space occupied by the abundantly well-formed mare standing before and above little Luna, and then there was the imperceptible wall of sheer authority she projected down on him.

Celestia was every part a spoilt royal who had grown fat off her land. During Luna's long, long stay on the Moon, Celestia had had plenty of time to enjoy an entire kingdom's worth of magic, no longer having to share one bit with another divine being. She had grown heavier, fuller and oh so much more sexual. While he had nourished himself on magical table scraps, Celestia had gorged herself endlessly and become even more fabulously perfect. Luna had been left to linger in his sister’s exaggerated shadow, gazing wistfully up at beauty beyond compare.

The Princess was just too much! So lush! So full-bodied! Even her very hair was too much, candy-coloured blues and pinks and purples dipping sensuously over her eyes, twisting and turning away in loops that seemed possessed of their own will, exaggeratedly forming curls and great waves that added so much extra size to her form... It was just so unfairly large, and it doubled or tripled the size of the silhouette she cast on the wall.

And her dress just made her seem even larger, more like the grand ruler coming to visit her silly little subject. If it were any other mare, perhaps the great, white floor-length dress Celestia had come for him in today would have molested her overflowing curves into a semblance of decency. But instead it made her look riper... like the richest and most decadent fruit hanging low on the branch, with a teasing readiness to be plucked.

The brilliant white gown was designed to be worn by royalty, sewn from finest silks, and it clung to Celestia's royally-excessive body like dirty lingerie. Like something cut for the bedroom.

Despite the puffed sleeves, her throat and cleavage were bare as could be, drawing her “little” brother’s ensnared eyes as surely as ever. But the slender curves of her straight, lean back were fit snugly with material as white and bright as a wedding dress. And it wasn’t even backless, the Goddess’s wings had been momentarily magicked away.

Her lewd meaty breasts, already known for their capacity to make boys thirst and slaver, had been transformed by the fabric. They were held tightly by the thin material of the dress, sitting high and proud, and framed by curtains of rainbow-sheeted hair on either side. Celestia’s heaving bosom formed a deep, deep cleavage bisected only by an shimmering emerald necklace. Her breasts were was incredibly heavy and plump, yet the jiggly, juicy expanses were kept aloft by their own exquisite perfection... with some slight assistance from the tightly-bound yellow sash running her waist.

They bounced happily away in their dreadfully-tight confines, the slightest shift in the larger royal’s weight seemingly enough to make the girls jiggle playfully along. Every time they bounced, Celestia grinned knowingly, she was unable to stop herself from smirking whenever Luna’s eyes were inexorably bosom-wards. She loved seeing him happy... and when was a male more happy than when they were completely spellbound by her tits? As far as Celestia was concerned, if she could fill his mind with nothing but thoughts of her heavenly rack, her sisterly duties would be fulfilled.

When Luna finally managed to look lower, following the rainbow trails curling about her figure, he reached Celestia’s waist. The Princess's waist was naturally and succulently lissome, complimenting a pair of brood-bearing hips that made all onlookers silently offer up stiff members to the Crown.

So robust! Celestia's lower body was that of the mother of a nation. It was perfectly full and teasing, more a testament than anything else of how much she had expanded in size and prowess.

The Princess had grown plump and round in Luna's absence, getting healthier by the day. And nowhere was this more evident than in her majestically girthy hips. Even in the tight clasp of that sensational dress, flanked by rainbow-coloured strands all the way to the very ground, they still defied logic in their size and shapeliness, like a sign of nobility all on their own.

As soon as the babymaking curves of her hips reached their conclusion, Celestia's dress cinched tightly around her thighs, then burst out into a ten-foot wide carriage that spilled all the way across the floor. The dress made the Princess even more imposing, more like an Empress of the Sun, or like the awe-inspiring Goddess she truly was!

But it wasn't even the flattering dress, or the delectable hips, that possessed Luna's thoughts. After all, little Luna knew all too well that those hips of hers were the carriage to bear something even more threatening to any attempt he made to be calm and collected: a thick-lipped, lusciously plump pussy, a diabolical sleeve that could easily fuck a poor little Princeling blind! And had. Not a single one of his harem girls had endowments to match his sister's royal mound. It was just plain devilish, as if it had been designed solely to exploit the weaknesses of his sensitive, twitching cock, seeking the fastest and most efficient way to reduce Luna to mewling in mindless pleasure, cock shooting out all its cum.

Luna could count the number of times she'd actually let him inside on one hand, and every single rapid-fire taste of undeniable euphoria had been over in what felt like the blink of an eye. Embarrassing for him. Humourous for her!

While her slit might look soothing and relaxed, Luna knew all too well what that naughty, grasping slit was capable of, and how powerfully it could tighten up at a moment's notice. Celestia's pussy handled cocks like Celestia handled her subjects: firmly, forcefully and fully capable of milking them to the last drop. And then making them thank her for it.

Celestia had developed all the lush and prodigious sexuality of a true Goddess and more, while the little black Alicorn before her still felt for all the world like just another tiny, innocent pony, halfway to crawling on his knees. She was like a fireworks show going off right in front of him, all the sequins on her dress sparkling, that full head of mesmerizing hair constantly rippling and shifting in magical waves.

In his weakened state, Luna doubted he could ever stand alongside this majestic being. Seeing something like that before him and knowing it was what he had been denied in his banishment, knowing that such a level of beauty was what he could become, should have become... It was maddening! Luna wished he could be so majestic, and sexy and... wondrous.

The little Prince had only ever possessed the same strength, beauty and incredible raw sexuality when the thousand voices of the Nightmare Dreamscape had rushed through his mind... when he'd been the intimidating and terrifying monster Nightmare Moon! Looking on Celestia and knowing conquering her would be the first step to his longed-for rebirth, Luna’s heart soared with determination to put Trixie’s plan in motion!

For the good of Equestria!

Unfortunately for Luna, that thought only lasted right up until Celestia dropped her oversized, plush rear straight on his undersized lap. She wiggled in and around to make herself comfortable, lush and full cheeks pinning his thighs with ease. “Why don’t you tell me a little more about what you’ve read? A bedtime story for your sweet big sister, perhaps?”

“W-well!” This was dangerous. Luna knew it. “We are… not sure we should. At least, not at this moment!”

Celestia was everywhere, all around him. She seemed all-encompassing, immense seven foot frame eclipsing him easily in his own recliner - and most of the recliner, too! The wooden supports creaked under her weight, and if she hadn’t purposely kept the full brunt of herself off him, she could have easily pressed him into the cushions. As it was, all he could see, feel, and smell, was her. Magnificent feathered wings danced in his vision, the air laced with cinnamon tones. And those thighs! So very large, rubbing oh so slowly over his burgeoning erection.

“We were… ah…” Luna bit his trembling lip. It was now or never. “Hoping to, well, speak with you on some Royal Business!”

“Royal Business…” Celestia clicked her tongue. As much as she loved to tease Luna, she was a princess first. Being big sister could always wait until her subject’s needs were... properly satisfied. “Very well!” She stood up, dusting off the lap of her dress. Her horn surged with a golden glow, and a massive velvet throne - properly sized to a princess of the sun - appeared opposite Luna’s. “So, Luna,” she said, snuggling into the seat, leaning forwards to show him precisely how low-cut her dress was. “What business have we to deal with?”

“Foreign éclaires - affairs!” Luna wiped the sweat beading on his forehead. Born into a position of power as he was, holding the very might of the Moon, Luna had never possessed the incentive to develop his skills at deception. He couldn’t lie to his subjects, and certainly not to his sister.

All the little prince could hope for that was she mistook his anxiety for embarrassment. There was no hiding his nervousness from her , but hopefully she’d just take it as a sign she had properly teased him. He could only hope. “For you see, the ambassador of Saddle Arabia has sent a gift. A gesture of goodwill... to show the great esteem in which his nation holds thee!”

Luna flourished grandly. “Behold!”

“Mmhmmm! Is that so?” Celestia nodded, the corners of her lips turning slyly upward. “How thoughtful of them to send me something!” She paused, cocking her head inquisitively. “But nothing for you, Luna?”

“It would… seem not.” He shrank back into his recliner, trying to look even smaller and less threatening than he normally did. It wasn’t easy when he was already so small and cute! “It has only been a short time since our return. Perhaps they have simply - ah - overlooked the Moon’s majesty! In our newfound benevolence, we suppose we shall spare their puny kingdom this one time!”

“How unfortunate,” Celestia sighed. “I will have to talk to them about that... Perhaps find my little brother a proper consolation prize while I’m at it. Let’s see what it is, then, sweet Luna.”

She shot him a sultry wink, stretching herself back on her throne. “Perhaps I can share.”

“There is nary such a need!” Luna coughed. He lit his horn, levitating the simple crystal bottle from atop his nightstand to the fireplace. It hovered in front of Celestia’s nose, giving the intimidating Princess something to focus on that, thankfully, wasn’t him. “Besides, it wouldst do naught for the Night. The draught enhances a mare’s beauty, and a mare’s alone. A concoction of the rare... nnnm... Balabo herb, which grows only in Saddle Arabia…” Luna bit his lip, searching Celestia’s face for signs of suspicion. He didn’t want to oversell it. “Or, ah, so they say.”

“The Balabo herb!” Celestia exclaimed, taking the tiny vial in her hands. She swirled the liquid around, appraising it. “Oh, yes, I do think I’ve heard of that. To enhance a mare’s beauty, you say?”

“I-Indeed! The truth is as you speakest, dear sister.” Luna could only hope his big sister was as oblivious as he was when it came to telling the difference between a nervous liar and an embarrassed little brother. He certainly couldn’t distinguish a skeptical sister from a teasing one. “Pre-tested for poison, of course!”

“Of course, of course.” Celestia grinned. She looked down on Luna with an almost predatory gleam.

“Well, this is just such a thoughtful gift. Don’t you agree, Luna?” She stood up to her full height, the vial gripped tightly in her hand. Luna was forced to crane his neck upwards yet again, trying to discern her face through the imposing shelf of her overwhelming bust. “Such a lovely, wonderful thing to give me.”

“The Saddle Arabians must know thee very well, Sister,” Luna murmured, steeling himself for what was to come. He tried to make her shrink in his mind, imagining Celestia as a tiny, modest waif, when he finally hit upon the critical flaw in their plan.

He may as well have tried to imagine her as an elephant.

Even the most creative mind would have had difficulty thinking of a small, flat-chested mare while sitting completing occluded by the shadow of those breasts. “It seems they know thy tastes.”

“It would seem so, wouldn’t it?” Celestia’s fingers worked nimbly at the cap, twisting it off. “Well, it sounds like the Saddle Arabians spared no expense in delivering me this tonic... After such an effort, it would just be rude to turn it down!”

“Bottoms up!”

Celestia swept her head back, exposing the white flesh of a finely-curved swan neck to her handsome little brother. One of those dainty hands, wrapped in one half of a pair of finest silk gloves, ran past his face, travelling up and up. And she had that little bottle in hand! Luna gulped as he watched.

Celestia's elegant fingertips came to rest on her forehead, danced sideways to her fluffy, upthrust ears, and pushed under her stylish mane. She lavishly swept the full head of Celestial hair aside, sending a tidal wave of bubblegum pinks and magical purples cascading down all over the little seat - and the prince seated in it! Luna’s personal space was suddenly invaded by long magical locks of every colour of the rainbow, spilling over his chest, down his face and carpeting his lap and legs.

There was, of course, the transparent excuse that it was all in service of more prominently exposing her luscious pouty mouth for the guzzling, but Luna felt more and more like it was all part of an elaborate tease. Sure enough, Celestia was slyly watching him the whole time out of the corner of her eyes, graceful laugh lines forming as her cheeks dimpled.

She was still smiling as she began to suckle at the bottle’s small head.

Luna could barely see her downing its contents behind the luscious swells of her dress-straining bust.

Watching the Goddess undertake even this simple act was too much. The tension in the air rendered every detail exact to poor little Luna. Celestia's long and greedy gulps, coupled with the sweeping pulses of the liquid travelling down her throat felt like his whole world.

It felt like as soon as Celestia had begun drinking, it was over. She brayed gently, a little whinny of approval, before magicking the flask away. She wriggled in Luna's lap.

"Well?” Celestia licked her lips, slurping up every last drop. Her large red tongue had him mesmerized. “Is it working, Luna? I know you can hardly contain yourself around my beauty as I am now...”

She shook with a generous burst of laughter, then spoke again: “I wonder... Whatever will my dear, sweet little ‘Nightmare’ do with himself when I become more beautiful still? Mm?"

Celestia danced her fingers along the underside of her smaller brother’s chin, hooding her eyelashes. Far from shrinking into modesty, she seemed more aggressive than ever. It was as if the fluid intended to sap away her defenses against his will had only had drained her inhibitions. "When my beauty is even more unrivalled, will little Prince Luna finally snap? Ohoho~ I'd like to see that."

Princess Celestia loomed closer, until Luna could feel her hot breath whistling on his cheek. "Will Nightmare Moon come pouring out of this horny little vessel and pound me senseless? Mm~”

That teasing smile of hers was inches from his face now. Celestia licked her greedy chops. “Oh! Maybe you'll bring about a thousand years of night in my panties?”

Luna wanted to shy away from her, but it suddenly seemed like there was even less space in the chair than a moment ago. Even more of his world was being packed full with teasing white mareflesh, showing no mercy towards him... or his thick, fat member.

"Well? How does it feel to bask in the Saddle Arabian-infused beauty of the Equestria's Sun-Kissed Goddess? Don’t keep me waiting, little brother! Speak your mind.”

Luna was feeling light-headed as well. His already-tight latex shorts were now painfully so, wrapped like a second skin about the member copiously leaking into them... He was gushing down there, a steady flow of Celestia worship seeping out of his flare and bubbling under the surface of the stretchy material. "Ahhnn... Mm...

"You are... You are..." Luna stalled for time, turning his mind more and more to shrinking her, willing this puffed-up royal to deflate down to a more manageable size... before she overwhelmed his helpless mind entirely! He wanted to win today, which meant there was no time to become Celestia's happy little cum-drone again!

"Mayhaps I should try a simpler question?" laughed Celestia, pressing her fingertips together over those obscene breasts, and pursing her lips together in a pouty kissy face.

The Princess moved closer, dangling her face a few inches over his. She popped her tongue out of her mouth, sliding lecherously it across her crooked, naughty smile. She fluttered those long eyelashes. "How's your cock?"

The little royal squirmed under her ruthless gaze. His hands danced across the large chair’s cushions, not knowing where to settle. They ended up uselessly gripping the silk as he stared up at his radiant sister. Luna whined in a voice so tender it made her heart quaver: "... Hard... We have become...”

Luna closed his eyes and let out a dreamy sigh. “... So hard...”

Celestia giggled. “I do so love how honest you are.But getting so turned on by your own sister, Luna! Why, you must be absolutely humiliated right now.” She tsked, shaking her head at him.

“Nnng…” Luna grunted, thoughts swimming as more and more Celestia closed in on him. She was simply too soft, too warm and too everywhere for him to catch his breath. Even just thinking felt impossible right now.

Luna’s cock throbbed helplessly. It was all he could do to hold onto his one last rational thought, the only thing restraining him from giving into his lust: that curvy giantess would soon be reduced down to a more... manageable... size. Any second now, the magic would take hold of her and shrink her down, breaking her charms over him forever. Any second now at all. Luna just had to hold out. He just had to be strong a little longer. “Just a little more…”

“Just a little more what, hmm?” Celestia purred, moving the slightest bit closer. Her full, enticing chest was completely against Luna now, which meant his world was filled - stuffed - with tits. Overflowing with them. Her enormous breasts, barely constrained by her dress, were swaying before his eyes, the large nubs of her nipples dancing teasingly along his chest. “Until the potion takes effect? Or... mmm... until you blow a big sticky load for your big sister to gobble up?”

Celestia hiccuped, her pale white cheeks blushing a rosy red. A visible warmth rose up in the Princess’s body, ticking Luna’s prison a few degrees higher. “Oooh, I can feel the magic now. It feels… mmm.”

Luna slowly shut his eyes tight, a little cheer rising in his breast. There! Victory, at last! In his mind’s eye, he could already see it happening: the shock on her face as her mountainous tits receded into gentle hills, and her shock as her formerly smaller sibling rose high above her. She’d have to get used to it, he supposed. Perhaps she’d learn to treat him with a bit more respect, once she was the littler one.

“Oh, yes…”

The little prince’s eyes immediately shot right open again. That wasn’t right! Why wasn’t it happening? She was supposed to be shrinking now, but if anything she seemed to be getting even bigger! He could feel her soft weight pressing him deeper and deeper into the chair, her breasts pressing heavier on his chest like warm, jiggly water balloons filled from the tap. Where Celestia had started looking him at the eye, now he was level with the increasingly triumphant grin on her face… and sinking as she inched steadily higher above him.

Luna's armchair creaked concerningly under the pair. It had been put together with a dainty pony filly in mind, not the expanding, growing and developing Alicorn Goddess filling it up right now!

It seemed like so long ago now since Celestia had first sashayed her way into the room, heavy-handedly depositing all seven feet of her powerful, strong and most of all intoxicating body in his lap. He actually found himself wishing he could go back to when she'd merely dominated his personal space, rather than annexed it. Oh how Luna wished he could go back to those simpler times!

Back then, she'd just been sitting away from him, the cheeky princess impishly wiggling in his lap like she wasn't wielding the power of the kingdom's roundest, fattest badonkadonk over him... She'd kicked her long legs out and leaned back, making a little playground for herself of Luna's lap.

But at least Luna was somewhat used to that sort of treatment by now... It wasn't out of the question to have Celestia settling her plush rear in his lap, even if her rear-end was so wonderfully squishy his thick thighs sank into it, and she was left sitting in the chair on top of him! It was a little troublesome feeling like just a little bump under her butt, or some loose change stuck in the cushions, certainly, but that was at least manageable. It existed within the realms of what felt possible.

What the prince was dealing with now, however, felt like it was in an entirely different realm.

Celestia was front and center on the chair, mouthwatering breasts unapologetically crammed up against his face. Filling his suddenly shaky vision up with pale white Celestia, demanding he stare at her fantastic rack. Stare, and be spellbound. There was no subtlety here... Just the sheer majesty of her chest’s, awe-inspiring size.

As for the rest of him, Luna's entire chest, from his slender waist to his soft and squishy chest, was thrust into the "barely-there" space between the giantess's immense thighs! The cocky deity was now tall enough she could effortlessly fold her arms over his head, and she placed her hands and elbows on the chair's high back. Celestia loomed all the way over her cute little stallion, putting her forehead on her wrists, and wreathed Luna in vibrant rainbow locks so thick they actually weighed Luna down.

The flood of ethereal Goddess tresses kept coming, filling Luna's lap, cloaking his shoulders and blotting out the previously-unbroken starscape of The Night.

The more he sank into her mane’s perpetually-wavering depths, the closer little brother and big sister came together. And the next time Celestia tossed her head, imprisoning him deeper in her luminescent, untamed locks, Luna caught a flash of that very wicked thing he knew was waiting there: the cheeky, upturned grin on Celestia’s face, the smug smile of a mare who had her prey right where she wanted him. Fat cock and all!

As above, so below: while she wrapped his head and shoulders in sheets of hair, the floor-length dress straining against Celestia's frame had become a mire Luna’s lower body was sinking into, virginal white petticoats spilling over both arms of the chair, splashing across the carpet’s length and breadth.

Luna had such a big bedroom. Celestia could have sat on the bed, or stood by the window or the fireplace... If she had chosen to, she could have given him plenty of space and still been adored in all her magnificence.

But here she was, riding his lap. And there was no escape for little Luna.

Maybe she would have chosen that moment to loom all the closer, close enough to give him a kiss, if the Princess hadn't suddenly heard a fun little ripping sound coming from her overstrained dress. The seams on her dress, both in the rump and the thighs, were most certainly bulging out. Her shoulder straps dug in tighter, bracing to snap right open.

Her grin faded for a moment as she gasped coyly, then turned to an incredibly pleased little smile. "Oh... Oh my. Luna, darling, did you hear that?"

Celestia placed a hand to her cheek, feigning a look of shock that wouldn't have passed in the most amateurish foal's pantomime show. "Why, it seems like your potion shrunk my dress! How absolutely dreadful!"

"Or maybe..." she mused, knowing mischief playing in the Goddess's eyes. "Maybe it's something else?"

“We…” Luna averted his eyes, somehow tearing his gaze away from his all too voluptuous sister… or he tried, at least. Every corner of his vision seemed filled to bursting with soft, supple Celestia. “We do not know what you mean.”

“You don’t?” Celestia giggled, her titanic bust inching its way ever higher over his head. His ears filled with long, slow rrrrrrrriiiips of doomed fabric as her dress filled with more Celestia than it could manage. “Goodness, my poor little brother must be having some trouble thinking! That couldn’t have anything to do with all the blood rushing down from his head, hmm?”

Celestia's dress was losing its struggle with her unleashed body. Face-to-face with giant, soothing Alicorn tits, Luna could see that better than anyone! Her chest was growing even moreso than the rest of her, dangerous curves not just taking off in height, but also size, and threatening to snap the straps of her dress at any moment.

The unexpected expansion seemed to strike Celestia with a giggle fit. It was as if the very act of growing even bigger, even more powerful, felt delightful. So much so that she was overwhelmed by pleasure and happiness, tossing her head this way and that, shaking with tinkling laughter.

The already low cleavage of the much larger mare's dress was creeping down further, showing more succulent flesh by the moment. A body Luna had only seen in brief glimpses was now being bared - in full. Once upon a time, the fashionable garment had done a most demure job of keeping Celestia ladylike. The oversized royal melons had been well-presented, cupped and upraised. But now, stretched thin as it was, more and more soft breast was overflowing over the dress's hem.

In the end, the "V" neck of Celestia's dress had been stretched into more of an "O." It couldn't possibly wrap around her bust anymore, not with the throat of the outfit strained somewhere down by her belly, and strained so far to either side it was tugging her nipples along with it. Her breasts were parted as the dress began to break, briefly revealing the long line of the princess's solar plexus running between her bosom.

Celestia let out an adorable little squeal as her dress abruptly exploded across the surface of her breasts. The long, drawn-out riiiiiiiiip of tearing fabric had been steadily continuing for some time now, until only a few strands of material had still travelled the dangerous expanse of her bra-clad breasts.

Well, their duty was over now. Celestia’s dress fell away from the upper half of her body in tatters, and her expanding breasts began working on making her bra next on the chopping block.

Luna stared up dumbly, and found himself wondering which would come first: her bosom continue its growth until even that brief line was filled in, or would she bust her dress before then, swinging her melons down and inwards to smoosh his pretty face in her chest?

As Celestia's body continued to inexorably expand, filling up Luna's little armchair until it looked more and more like a toy from a dollhouse, those eye-level breasts began to rise above him. At first their ascent was leisurely: her growing, and her body, were far from anything reasonable, but at least this felt somewhat manageable! If little Luna simply zoned out and tried not to think too hard about those glowing, warm centres of sexual power, it might still be possible to not just drool himself into her clutches forever.

But that only lasted until Celestia's hooves touched the carpet. Coming to rest on the floor, the Goddess reorientated herself on top of her heels, half-standing. Her chest rose up over the chair's tall back.

And just like that, Celestia began to cast a long shadow. Luna's whole body, from his long, starry curls, to his blushing face and small shoulders, was swallowed up by the blackness under Celestia's grown-out rack.

More and more pale ivory flesh was beginning to peek through the splits and runs in Celestia's dress. The chair under Luna was beginning to creak, and Celestia's mane risked brushing the ceiling. He couldn't possibly begin to handle all this mare~

Barely more than ten minutes ago, Celestia would have needed her whole upper body to occupy the same real estate she could smother now with her tits alone. And she was bringing it all down on him. With a satisfied smile, the Princess began to lower her grand weight, shifting her center of mass to bring all that glorious bosom right... into... his lap~ Luna groaned as warm, suffocating breastflesh crashed over his lap. It was impossibly soft, but also impossibly heavy.

It was only now that he could truly understand just how deep this whole scheme had put him in trouble. Next time, he would heed Twilight and Rarity’s warnings! He really would!

This was bad, and much worse than it normally would have been. In the past, Celestia had never had much trouble getting her way with him before, but at least he had always been able to resist, even if it were just a little. No matter how great her copious feminine wiles, it had taken her effort to pin Luna in place and seduce him. But not anymore! Now dominance was as simple as lying on him, entombing him easily beneath her all-consuming bust.

“Enjoying the view, Luna?” Celestia teased, her height still shooting up in spurts here and there. Pound by pound, inch by inch. Creamy white flesh emerged from the growing tears in her dress like rising bread dough, the fabric straining heroically to contain the swelling princess.

With that much pressure on the Princess’s dress, it wasn’t long before the dress seams running up her thighs began to pop-pop-pop like a row of fireworks, each loosening of the material accompanied by oodles of fine royal flesh squeezing its way through. Celestia sighed in relief as the pressure eased on her lower body... if only the lower-end of her dress hadn’t had to become split completely down the sides to make it happen.

Unconcerned with all that, Celestia was much more interested in doing equal amounts of damage to handsome little Luna’s clothes. Her horn glowed, and a soft little rrrip rose up from Luna’s lap, his erect cock springing free of its former prison. “I know I am.”

Luna summoned up the courage to take a peek. His throbbing erection, massive as it was, could only barely keep itself afloat in the deepening canyon of Celestia’s cleavage. The flared onyx head throbbed above a sea of brilliant white fur, slick pre dribbling down the shaft and into the mare below. Luna groaned in ecstasy as Celestia shifted ever so slightly, ripples and waves of motion reverberating around him like some lesser mare's pussy - everywhere! “Stop!” he gasped. “Please, We beg you!”

“Hm…” Celestia put a finger to her cheek, as if pausing to think about that. As though there might be some, small chance she would relent. Her lustful eyes, however, were locked firmly on Luna’s shiny black shaft, sinking ever so slowly beneath the conquesting curves of her rising tits. “I don’t know, Luna, that doesn’t seem like a very compelling deal. What would be in it for me, hm?”

Luna faltered for words, hypnotized by boobs. Celestia stifled another laugh, and let her quaking cleavage come to rest for a moment. After all, poor Luna couldn't possibly begin to form an answer like this, not with Celestia massaging his pole with assets all Equestria would have lusted for.

She waited just a few more moments, smiled winsomely... and then darkened her expression. "Bzzt! Time's up!”

“Looks like you're trapped for the moment, darling~" Celestia cooed, redoubling her expert efforts to torment his member. This busty pony seemed to want to keep him on edge and steely, cock oozing out one frustrated drop at a time.

Barely visible behind that cheeky smile and those all-consuming melons of hers, Celestia gave her big bum a playful little wiggle. With the garment shredded down to the top of her hips, the jiggle in said wiggle was plain as day to anyone who wanted to look. A more modest mare would have turned bright red to be so exposed.

It was so much fun to tease this little cherub, she could have done it all day long, regardless of whether or not they shared familial ties with her, related by both blood and endowment-size. The fact she was teasing her little brother on top of all that was just the cherry on top of it all!

"You know, Luna, I really should be thanking you... When you're the Goddess ruling an entire world, raising the Sun each morning... It can be so easy to become indifferent towards even one's divinity."

Celestia thoughtfully ran her tongue around her mouth, choosing her words thoughtfully. "But this... My, my! I could get addicted to growing like this! I've never felt quite so in-control, so... mmm... so sated, in all my days! All this... power...”

She arched her back, running her hands up her own belly, cupping her enormous breasts. “Elements have mercy, I’ve never felt so gooo~oood!"

Luna was scared, and rightly so.

But, he knew he had to begin some sort of counter-attack, lest he be swallowed up completely. The prince laid his fingertips atop Celestia's breasts, fanning them out; they looked for all the world like four little black stallions attempting to cross an endless white desert~ When he tried to gently ease her away, the desert quickly became quicksand.

Trying to move Celestia's awesome bust was like putting his hands on a waterbed... wherever Luna's hands touched, they sank into Celestia's flawless, unmarked skin, immediately followed by more creamy benevolence rising up on either side of each finger, swallowing him up in princess-chest.

"Celestia... Nnnh... Going to cum..." he whimpered cutely, wriggling his trapped little bottom.

"What's the matter, little Moon?" Celestia asked, not even pausing when the rest of her dress finally gave up the ghost, along with her bra. By now only a few minor tatters remained... and with nothing to hold them up, her tits collapsed entirely into Luna’s lap. Celestia gladly granted him the blessing of "seeing" her fantastic dishabille - it wasn’t like she could stop herself at this point, anyway!

Luna lost his voice again. So luxurious... The vista spread before the prince was the height of opulence, lingerie far beyond the ken of mortals. Celestia's milky-white set of breasts were now bulging out of a light-coloured silk bra, reinforced a thousand times over with both magic and flawless craftsmanship to be the bra capable of supporting the carriage of royalty. A formidable garment for a formidable bustline, and nothing less would ever have done for her.

Despite the intrusion of her chest into his lap, and increasingly, of his body into her chest, Celestia continued unabated, lightly teasing her little brother as she jostled herself in and over his lap. "You've got enough of a big, macho pole here to handle a big, fat harem stuffed with well-stuffed mares... but suddenly just one weak little filly is too much for a royal stallion?"

Celestia simply leaned forwards, and suddenly the largest, thickest stallionhood for miles around suddenly looking insignificant in comparison. It looked like a toothpick under the Princess's drooling, cavernous mouth. Like she could swallow it down in a single inhalation.

She propped up his member's underside with the bed of her royal red tongue and wasted no time helping him inside her mouth. With great slurping sounds that seemed extra echoing for her new size, Celestia gave Luna's leaking, sister-loving shaft the grand tour of every nook and cranny of her insides, swirling him around like the finest of wines.

Then she drooled him out disdainfully, his released cock immediately flopping onto her tits with a wet thud. It looked woozy - like it couldn't stay up - weighed down under a cascade of her newly sized-up and extra-gooey saliva.

The Amazonian Princess was smiling at Luna through slitted eyes. "What's the matter, little Prince? Hm~hm~hm~"

Celestia brought both hands around, laying her fingertips gently on the swells of where her bra was splitting around those mega-mams, some fingers coming to rest on the intricate wiring, others touching down on raw, unfiltered pure mare. With a series of little "Tpp," sounds, she touched down on the sensitive flesh, and pushed inwards, biting her lower lip as she watched the adorably squirmy results.

She squeezed Prince Luna's dick between her epic cleavage, and he saw stars.

"Oooh! Ooh..."

So much warmth and pressure on his penis, slithering up and down... the barely-there slit between the Princess's alarmingly-huge teats was tight as a pussy, slippery with her sweat and the fluids he'd released in worship. Celestia saw the look of consternation on her prey's lips, knew he was close to finishing, and redoubled her efforts. She would have her due, just like always.

Not that she even needed to see his face to know he was on the verge of cumming... the way he trembled against her told Celestia he was about to do what males like him did best, and all over her rack.

"Looks like even with all those ponies waiting on you hand and foot, you're still a sucker for your big sister Celestia..."

Celestia touched a finger to her mouth, smiling down at the writhing, lovestruck boy-toy. "Maybe I was wrong to try to spread your progeny around... Maybe I'll just keep little Princeling Luna as my own personal cum-cattle spunk-fountain~"

Celestia’s bra finally gave up the ghost. It shot off her heaving bosom, with no more room to in its confines to contain her any longer. Glorious, pale-white bosom wobbled its way into Luna’s field of view, and the sight was instantly calming to him. His favourite breasts had arrived...

The Princess grinned devilishly, leaning forwards and gripping her tits, redoubling her pumping on his rampant rod. Heat, pressure, wetness... It all overwhelmed him, whiting out the poor sissy stallion's brain, leaving him helpless before Celestia's brainwashing body. "Go ahead and let it all out, silly boy... I’m just too much for you.”

“Annh!” Too much for sure. With a gasp, Luna finally came, big balls seizing up beneath Celestia’s bigger breasts, his twitching shaft finally showing some spunk. Its final thrusts sent those hefty tits a-jiggling His nuts rushed to unload their full contents into Celestia’s cavernous waiting mouth. Many a mare had been unable to swallow a full load, eyes popping, cheeks bulging, bellies fit near to burst… but to Celestia an endless deluge of princely cum seemed little more than a light snack. She slurped at the shaft like it was her favorite lollipop, effortlessly downing rope upon rope of thick, sticky cum.

“Mm,” Celestia smacked her lips when finally his orgasm tapered off, a few drops spattering and disappearing against the snow-white landscape of her breasts. “Delicious, Luna,” she giggled. “For an appetizer, of course!”

Luna could only softly groan. He had been left drained - in more ways than one - by his tremendous orgasm. “Please…” He begged weakly. She was simply too big, too overwhelming, too… too much.

“More?” Celestia grinned craftily. “Goodness, Luna, aren’t we eager!” Her horn lit up, thrice as bright as it ever had before. “Oh, being bigger does come with plenty of benefits! There’s so much magic, I hardly know what to do with it all.” She winked at him as a warm golden glow of her power wrapped around his flagging shaft. “But I can think of a good place to start.”

Luna’s eyes nearly rolled back in his head as Celestia’s spell took hold of him. His once-weary cock jumped to full mast in mere seconds… and kept going, ballooning ever so slightly thicker and fatter in tandem with his sister’s still-constant growth. The prince’s spent balls were set immediately on churning up a fresh batch of rich royal cum, swelling bigger and fuller than ever before.

“Oooh,” Luna groaned, barely able to think anymore. How could he, when his balls were swollen to the size of grapefruits, and filled to bursting with unspent cum? “Don’t stop… Please!”

Sometime later, Celestia shook her shimmering mane out and rose from where she’d been laying on the floor. The wreckage of Luna's armchair had been thoroughly distributed about the room, the lacquered yew turned to splinters now after being crushed under royal booty, regal teats.

She casually dusted herself off and smiled, magicking up a new dress to replace the old. She surveyed the scene casually, seeing the chair wasn't the only thing that had been crushed.

Luna was laying face-down on the ground, lacking even the energy to crawl out of the steamy sex-puddles left from their coupling. So undignified! His long starlit mane spilled all across his head and upper body, wending its way through the wreckage of his bedroom.

His little body was trembling. The source of his brainlessness, a bloated, lengthened for her pleasure extra-red and raw cock, lay massively engorged between his legs, so long it snaked down to his knees. The big flared head looked beat-up and kissed-better in equal amounts.

It could be hours before Luna’s endowment went back down to a more manageable size, and he was stuck with this unwieldy giga-cock for the foreseeable future. He'd been truly studified, shaped-up to cartoonish cock sizes, all for Celestia's amusement.

A few lipstick-shaped stains lingered here and there along the veined pole where Celestia had marked her territory, but few had remained intact under the deluge of saliva, cum and her vaginal secretions dripping down his big rod.

Below the pole, Luna's sperm-drained nuts were big and red, and looked sore as heck! It was his own fault, really. He hadn’t just been producing endless loads of cum over and over, but also firing them off in worship. All spunk had been splashed on the altar of the heavily-rounded Goddess before him.

The room was flooded with semen. Sticking to the carpet, hosing down the broken chair and its comfy cushion... Just looking at it all made Celestia thirsty, and she lashed her tongue along her cheek, picking up a few strap droplets.

"Mmm~ Not bad, Luna."

She leaned down, lifting the fringe of his mane. The look of him under there made her giggle again, those fucked-out, glazed-over eyes not even turning to look up at her. But he was obviously still conscious: Luna's tongue moved a little bit, his breath quickening.

When Celestia spoke next, her voice was overflowing with good humour and cruelty: "Well, that was certainly fun! But you might wanna build a little more stamina before you and your little friend Trixie try and play another naughty prank on me. Best to keep things entertaining, heehee~"

Celestia sashayed smugly out of the room, butting the door shut behind her with one of those big, maternal hips. Her impish laughter echoed all the way down the hall.

Author's Note

Oh no~! What's gonna happen to Luna???