The Princess' Posterior

by Megapone

Rating: mature
Tags: Romance
Length: 8854

Lt. Silver Spear has a problem: Princess Luna's massive flank just won't leave his thoughts. No matter how hard he tries, he can't get her ass out of his head. And then Princess Celestia decides to give her own "assets" a boost...

Lt. Silver Spear has a problem: Princess Luna's massive flank just won't leave his thoughts. No matter how hard he tries, he can't get her ass out of his head. His situation isn't helped in the slightest when Princess Celestia, in a bid to win back her place in the limelight, decides to give her own assets a little boost. As Spear finds himself caught between two increasingly bottom-heavy sisters, he'll have to control his arousal—or else receive the opportunity of a lifetime.

A commission for SunStone. Coverart by weasselK.

Published 1970-01-01 00:00:00 UTC
Last updated 2015-09-20 01:20:02 UTC

The Princess' Posterior

Lieutenant Silver Spear had a problem.

It wasn’t, as most problems went, a particularly bad one. He was a fairly successful member of the Equestrian Royal Guard, having joined up not two years ago, and earning his most recent promotion just last month. He had his own room in the barracks, was looking forward to a good-sized pension, and though he wished that a mare could move in with him, was happy, for the most part, to live on his own for now.

His parents weren’t too clingy; his superiors were reasonable. His friends were some of the best buddies a stallion could ask for, and the last time he’d visited his dentist, she’d said that he had some of the whitest teeth she’d seen since Prince Blueblood’s last visit.

And yet…

...he still had a problem. A small one: almost, but not entirely, completely mundane, and yet he found himself consumed with it. It was, he guessed, probably some kind of ethical issue.

His problem was simple.

He could not, for the life of him—no matter how hard he tried—stop thinking about Princess Luna’s ass.

It was absolutely an ass worth thinking about, though. Upon her return to Canterlot a year and a half ago, she’d been the talk of the city. Not two months after she’d settled back into the palace, the suitors had started flowing in. After all, Princess Luna was an extremely attractive mare, and, though probably not the best fit for the word “eligible,” was definitely good-looking enough for the odd stallion or mare to try their luck anyway.

She’d always been a knockout—but a month ago, something had changed. Not for the worse; if anything, the absolute opposite. Silver Spear remembered like it was yesterday. He’d been standing guard outside of Princess Celestia’s chambers, waiting for her to wake up and begin her day. A tired-looking Princess Luna, bearing a positively massive ass, had then walked down the hall, given him a cheery wave, and then passed him by, her enormous rump jiggling madly every step of the way.

Silver Spear had barely been able to handle it at the time. The guard beside him had been struck dumb for the next five minutes. Now…

He glanced down and winced. He could already feel his stallionhood pushing its way out of its sheath.

This was not okay. He couldn’t be thinking about mare’s asses during his shift, and certainly not about the Princess’s. That had to be some kind of violation of professionalism or something. An ethical violation, at least.

But still… He bit his lip, the memory flashing across his mind’s eye again, not entirely unbidden. That ass, that incredibly globular rear—he’d never seen anything like it. It had always been a perverted point of note among the Guard that Princess Celestia possessed one of the most perfect flanks that any of them had ever seen—plump, rounded, bouncy—but Spear had to privately admit that Princess Luna’s new assets put her sister’s to shame.

“Hey, Spear!”

Silver Spear jerked to attention. “R-roger!” he sputtered. “Uh, sir!” His hoof slapped against his forehead in something resembling a salute, and he grunted as it bounced off. Ow.

A roar of laughter met his attempt at professionalism. “Chill, Spear.” A hoof slung around his neck and pulled his head to the side. “What am I, Captain Armor or something?” Nightshade smirked and tousled his mane. “Geeze. It’s way too easy to catch you off-guard like that. What were you doing, thinking about Luna’s ass again?”

The tips of Spear’s ears burned. His mouth opened and closed, working uselessly. “But—I—uh—”

Her eyes widened. “No way! You totally were!” Cackling, she thumped him on the chest and slumped against his shoulder.

Groaning internally, Silver Spear carefully reached up and extricated himself from Nightshade’s grasp. He leaned his spear against the wall and turned to face her, sighing.

From this angle, he had a much clearer view of her. A batpony mare a rank or two below him, Nightshade had always been an advocate of taking life less than seriously—which probably explained why she hadn’t been promoted further, despite the fact that they’d joined up at the same time. Still, despite the fact that she was more likely to prank him than drill with him, he liked her company.

Except, of course, when she was taunting him about ogling royal posteriors.

He cleared his throat. “I was not.”

“Don’t even try to deny it.” Nightshade smirked and poked him in the chest. “I could see the look in your eyes. You were even drooling a little.”

Silver Spear hurriedly reached up to wipe away his muzzle—and found it perfectly dry. He glowered at Nightshade.

“Gotcha,” she said. “But seriously, I don’t blame you. The Princess has one hell of an ass.” She whistled softly.

“Nightshade!” Spear hissed. His eyes darted around the hallway, his jaw clenched nervously. “We’re not supposed to talk about this kind of thing!”

“Maybe you’re not,” she said casually. “But she’s been the talk of the Night Guard ever since she enlarged it. Not that she wasn’t already,” Nightshade added, “but…” She shivered, grinning lecherously. “Damn.”

Spear bit his lip. Images of Luna’s rump: those big, plump asscheeks, folding over her haunches and jiggling profusely with the sway of her hips, leapt to his mind’s eye. Struggling to keep the blush from his lip, he hissed, “Well, maybe the Night Guard finds that kind of perversion acceptable. But the Royal Guard has higher standards than—”

“You’re thinking about her right now, aren’t you?”

“No,” he said quickly. Way too quickly. She quirked her eyebrow knowingly, waited. His shoulders slumped. “Yes,” he finally admitted.

Nightshade cackled. “Oh, believe me; you are absolutely not the only pony who wants a piece of that. If it were me and Princess Luna, with nothing else but a big bed and those enormous, gorgeous flanks…” She let her words trail off, her eyebrows waggling at him.

“That’s a nice fantasy,” he said, trying to push that line of conversation away. “But it’s unbefitting of a guard to indulge in it. A princess would never descend to such a level.”

“Don’t be so sure of that,” Nightshade said. “I’ve heard rumors of some higher-ups in the Night Guard getting it on with your ‘oh-so-pure’ Moon Goddess.” Her smirk widened into a predatory grin. “Who knows? Maybe one of us could get lucky.”

Get...lucky. Silver Spear swallowed. “All the same,” he said, slightly unsteadily, and trying to push the images out of his mind before his erection got any more visible, “I’d rather not discuss that kind of thing on duty.”

“Sure y’won’t.” Nightshade winked. “But you might later tonight in your bunk.”

“I—”

“Messin’ with ya.” She punched him on the shoulder; he winced. One eyebrow raised, she said, “But don’t be so quick to give up hope. I’ve heard some interesting stuff.”

“I’m...sure,” Spear muttered.

“Catch you ‘round, then.” Giving a little wave, Nightshade turned to go. Silver Spear suddenly found himself watching the sway of her step, the little bob of her hips in time with the swish of her tail. Then he realized that he wasn’t thinking of her so much as he was thinking of Luna, her bountiful figure overlaid with Nightshade’s much slimmer one.

When Nightshade rounded the corner and vanished, he finally managed to shove those thoughts out of his mind. Swallowing, Spear turned back to pick up his spear before settling back into position. No matter what, he would retain some modicum of professionalism.

Later that night, he cried out softly, muffling his moan as his orgasm hit him. His sheets drenched in his seed, and the barracks dark around him, he let himself slowly drift off to sleep. The last thing he saw before his eyes fluttered closed was a perfect, perky butt, bearing a dark blue Cutie Mark nearly the size of his head.

Celestia was not happy.

On the outside, she was the same Sun Princess as ever—tall, regal, and perfectly serene. But on the inside, she was…

Well, she wasn’t quite boiling. Simmering, maybe.

“Good morning, Princess Celestia!” Her morning guard inclined his head, offering a small smile. “How did you sleep?”

“Well,” she said. She wasn’t in a mood to say much more.

“Good to hear,” the guard said. A silver-grey stallion with a slightly darker mane, he snapped off a quick salute before saying, “Your breakfast is ready to be prepared, Princess. What shall I request of the cook?”

Most mornings, Celestia would order an omelette. Perhaps a muffin. “Surprise me,” she’d often say, and more often than not, she’d receive a pile of pancakes as tall as her head.

But not today. Today, her appetite was all but nonexistent.

“Tea,” she mumbled, and passed the guard by.

The guard had to trot rather quickly to catch up with her. “Are you feeling alright, Princess?” he asked. He almost looked concerned.

She sighed, let him pull her chair out for her. “Fine,” she said, and sat down.

As mares went, Princess Celestia was fairly well-endowed. Her beauty was often said to be unparalleled—but her most defining feature, the gossip-inspiring asset that served as her biggest guilty pleasure, was her rump. Her large, round, plush rump.

From the moment she’d started padding her diet, she’d adored the attention it earned her. Her big, tight flanks wobbled prodigiously wherever she walked, catching the eye of diplomats and citizens alike. There wasn’t a pony in all of Canterlot—if not Equestria, some ponies said—with an ass that could possibly compare to hers.

Until, it seemed, now.

Usually, when Celestia took her place at the dining table—any seat, really—she took a moment to savor the sensation of her generous rump squishing and spreading out beneath her. It was rather like a pillow in that regard; carrying around her own padding was but one of many benefits of such a well-sized rear. But this morning, caught in the mire of her own bad mood, Celestia paid barely any attention to the way her flanks squished against the arms of the chair. She had another rump on her mind.

Perhaps some conversation would take her thoughts off things. “What’s your name?” she asked the guard idly.

“Silver Spear, Princess.” He saluted again.

She scanned her memories for the name. “467th platoon?”

“Correct.” He looked faintly awestruck at her memory; she merely accepted a cup of tea from her butler and set it down on its saucer. “I joined two years ago.”

“You were enlisted when Princess Luna returned, then?”

“Yes, Princess.”

Some part of her warned her to stay away from this path. But she didn’t care. “What have you heard of her lately?”

“I—” The guard—Silver Spear—faltered. Had Celestia been watching him more closely, she would have detected a quaver of something in his eye. “She’s, ah, been doing very well, I hear.”

“Oh, yes,” Celestia said placidly. It was a minor struggle not to roll her eyes. “Very popular among the citizenry. In fact,” she went on, “I’d say that she’s very lucky.”

“Lucky, Princess?”

“Why,” Celestia said, “I don’t believe that there’s a single eye in Canterlot not on her these days.”

She glanced aside at the stallion, taking a sip of her tea. There was a faraway look in his eyes, as well as a slight tremble to his jaw that almost looked…

...afraid?

Was Princess Celestia jealous?

No.

There was no way.

Princess Celestia did not get jealous.

And yet…

Spear swallowed. He would have to be very careful here.

“I, ah, would not be surprised. Princess,” he added, somewhat hastily. “Your sister is...quite regal.”

“Regal?”

“Majestic,” he said. “As befits a mare of her stature.” He paused, weighing whether to go on. “And certainly beautiful.”

The flicker in Celestia’s eyes told him instantly that he’d made a mistake. And yet…

Was it possible?

“Beautiful?” Celestia said. “Bountiful, surely.”

The image of Luna’s wobbling, globular ass filled Silver Spear’s mind for a brief instant before he shoved it roughly away. “Erm,” he said, refusing to meet Celestia’s eyes, “perhaps.”

“Well,” Celestia said, taking another sip of her tea. “I can’t really begrudge her the attention. It’s excellent that she’s acclimatized to modern-day Equestria so well.”

“She does seem to be enjoying herself,” Spear blurted. Celestia raised an eyebrow. Something unspoken passed between them.

“True,” Celestia admitted. “Still, though I realize how ridiculous this sounds coming from me...I cannot help but feel a small bit…” She mulled over the word. “...inadequate beside my sister’s new popularity.”

There was a pregnant pause. Silver Spear felt a bead of sweat rolling down his forehead.

This couldn’t be happening. And yet it was. Could Princess Celestia…

Was Princess Celestia actually asking him for advice?

Spear cleared his throat. “Perhaps you might consider how Princess Luna obtained her new…” He searched frantically for the right word. “...stature? Surely there’s some way to follow in her hoofsteps.”

Celestia appeared to consider his words for a moment. “Hm,” she murmured. “There is a spell that might help… An old friend of mine at the Academy… Hm…”

She brightened. “Aha! Excellent. Thank you, Lieutenant.”

Silver Spear nearly collapsed in relief. Instead, he merely saluted. “My pleasure to serve, Princess.” Then he grunted, his eyes bulging slightly as Princess Celestia seized him in a bear hug.

“A perfect idea!” Celestia said, squeezing him to her in a very un-princesslike manner. “Thank you again!”

And with that, she dropped him to the ground—making sure, though, that he landed on his hooves—and turned to go. Silver Spear stared as the Princess all but galloped off, dashing down the corridor. As she went, he allowed himself to eye her bouncing, jiggling rear, her round, taut butt cheeks smacking against the tops of her thighs with every step she made.

“Tell the kitchen to prepare a feast!” Celestia hollered back. “I will need a bountiful amount of food—for an equally bountiful figure!” And with that, she curved out of sight, her butt still jiggling madly.

Silver Spear just stared. After a moment, he collapsed into Celestia’s former chair.

He couldn’t have just encouraged Princess Celestia to get an ass-job. And yet…

He eyed the tea, still steaming in the cup, and silently wished it were alcohol. He had a sudden feeling he’d be needing it before long.

The next morning was the beginning of the annual Equestrian Political Conference. Nobles, diplomats, and politicians from all walks of the nation had come for a weekend of discussions, debates, and deals that only Canterlot could offer. It was one of the most notable events of the royal political calendar.

There was just one problem, Silver Spear noted, as he glanced anxiously over the small sea of ponies milling about the ballroom. Princess Celestia wasn’t there.

Princess Luna certainly was. She’d taken up residence by the buffet table, snacking lightly on a plate of pastries as she conversed with a half-dozen attendees. Though she looked tired, her laugh was as booming and uproarious as ever; the smiles of her company were no less gleeful. Then again, it wasn’t difficult to see why she was so popular. Her big, plump flank still pushed out over her haunches, her Cutie Marks wobbling slightly every time she so much as twitched. From the looks in her companions’ eyes, they had no intention of looking away any time soon.

Spear snapped to a quick salute when he noticed his superior, Captain Buffed Bronze, walking toward him. “Sir!” he said.

“At ease, Spear.” Captain Bronze nodded, then took a place at Spear’s side. “Everything good over here?”

“So far, so good,” Spear said. “Although…”

“What?”

“Princess Celestia, sir,” he said. “I’m a bit concerned. Isn’t she a bit late?”

Bronze thumped him on the shoulder. “Now, you just sit tight and don’t worry about that,” he said, not unkindly. “The Princess will get here exactly when she means to. She hasn’t missed one of these in decades; it’s not exactly our place to go around minding her schedule.”

“Of course,” Spear said. “Sorry.”

“You’re just doing your job, son.” Bronze, who couldn’t have been more than three years older than him, gave Spear a grin and a wink. “Don’t worry. I put a squad of new recruits on with her this morning; for all I know, she’s late because they can’t stop tripping over themselves.”

“Heh,” Spear said, chuckling. “Maybe.”

Just then, the sound of a spear’s butt hitting the marble floor rang through the room. “Excuse me!” a voice hollered.

The room quieted down to a dull buzz. Spear and Bronze looked over to the entryway, where another guardpony—some corporal; Spear couldn’t remember—was clearing his throat. “I would like to announce Her Majesty, Princess Celestia!”

The doors creaked open behind him. A spray of light applause filled the room—and then stopped. Not for disapproval; if anything, it was for the exact opposite.

As Princess Celestia made her way in, every eye was on her. Her stride was regal, her expression serene. Her boots and tiara had been polished until they were gleaming. In all respects, she resembled the perfect monarch.

And yet...there was the hint of a smirk on her face. And for good reason.

An enormous, plump ass stood straight upright over her hips, wobbling incredibly with every step she took. It was easily fatter than anypony’s in the room—even bigger, Spear could see, with a bit of shock, than Luna’s.

Her globular cheeks squished and slid across one another, her hips swaying in a most alluring and un-princesslike way as she made her way into the room. The bottom of her rump bulged obscenely. Her flank was filled out with a truly enormous Cutie Mark, a rippling wobbling sun that was easily two to three times the size of anypony else’s.

Every eye in the room was drawn past her head, over her shoulders and back, and straight to her magnificent rear. Even when Celestia cleared her throat and raised a hoof, only a few of the attendees managed to muster up the will to look at her face instead of past it.

“Good morning, my loyal subjects.” There was a musical tone to her voice, and a spark of amusement in her gaze. She knew exactly what everypony was looking at. “I’m so sorry to have kept you all waiting.”

Spear abruptly realized that his jaw had gone slack. He quickly straightened up, wiped off his cheek—and realized that a certain something had just flopped out of its sheath. He blushed a bright, cherry red and prayed that nopony would glance in the direction of his stiffening boner.

Fortunately, nopony did. They were too busy staring.

“Please,” Celestia said, surveying the crowd. Spear could have sworn that she paused on him for a moment—and had she just fluttered her eyelashes at him? “Don’t let me interrupt. You may all resume enjoying the event.”

Every other stallion that had fallen into a mindless daze took a moment to snap out of it. Some slurped up lines of drool; others blushed as bright as Spear. Most of the mares looked caught between fascination and jealousy, but most of those came to their senses after a moment or two.

Slowly, the crowd returned to its activities, and a low buzz of conversation filled the air. Silver Spear stared as Celestia smiled quietly to herself. Then he glanced back over to the buffet.

Luna was fuming. Her eyes were wide, her nostrils flaring. Her own perky, plump butt was all but quivering, her entire body held erect as she glared Celestia down. Her entourage had turned away, entranced by this new, larger attraction. As Celestia made her way into the ballroom, her eyes flickered in Luna’s direction. Spear could scarcely believe it, but the Princess had most certainly smirked in her younger sister’s direction, even as she swayed her hips alluringly from side to side, giving her prominent ass a rather eye-drawing jiggle.

“Well,” Bronze coughed, after a moment. Spear jumped; he’d forgotten the other stallion was still next to him. “I’ll wager that’s not all they’d like to enjoy.”

He gave Spear a cheerful thump on the shoulder. “Alright, Lieutenant. It’s back to work for us.”

“Yes, sir.” Spear snapped off a prompt salute.

But his gaze still lingered in two places: On Celestia’s big, wobbling ass, and on Luna’s red, glaring face.

Later that day, after the sun had set, Silver Spear was heading back to his barracks. He’d just finished a long patrol shift in the gardens, and was more than ready to hit the hay. It’d been a long day, and all he wanted now was to climb up into bed—and maybe, he added silently, beat one off to the memory of that morning.

He couldn’t help it. No matter how hard he tried, he just couldn’t get the image of Celestia’s prize ass out of his head. Its big, plushy roundness filled his thoughts, dominating his mind and pushing his libido further than he’d ever thought possible. Only his training had let him maintain a stern facade over his aching sheath through the day.

Any time he tried to think of something other than Celestia’s rump, Princess Luna’s flank popped into his thoughts instead. A few inches smaller than her sister’s, but little less magnificent, imaginary-Luna’s plush rump served Spear’s daydreams almost as well as Celestia’s. How he longed to knead it between his hooves, squeeze those flanks, hotdogging his length between her plump cheeks as he clenched her foalbearing hips tight—

Spear increased his pace to a brisk trot, a touch of red hitting his cheeks. He really needed to get back to his bunk. Unbidden, the twin images of the princesses’ asses came back to the forefront of his mind—not separate, as they had been before, but together. He envisioned the two sisters pushing against one another, their godlike flanks squishing together, their massive Cutie Marks rubbing against one another as their asses grew and grew and grew…

The sound of raised voices snapped Silver Spear back to reality. He’d been walking past a usually empty lounge when he’d heard them: one booming, one harsh but muffled. Eyes widening, he stopped by the cracked door, one ear twitching to the sound. He knew he really shouldn’t eavesdrop...but he absolutely recognized the first voice, and the first one sounded familiar as well.

“Unacceptable!” Princess Luna’s voice—for there wasn’t a mare in Canterlot with a voice that could compare to hers—boomed out like thunder in the small corridor. “Who does my sister think she is?”

“A grown mare,” the other voice replied. Silver Spear frowned. That sounded like General Penumbra, one of the highest-ranking members of the Night Guard. But what was she doing here? “Princess, please. I think you might be taking this a bit too personally.”

“My sister means it to be personal,” Luna rumbled. “Celestia knew how much this meant to me.” Her hoof struck the ground with the sound of a thunderclap; out in the hallway, Silver Spear actually jumped, half-expecting the ground to shake underneath him. “She is conniving to steal away the attention and love of Our subjects—and this, I shall not endure.”

“But what do you plan to do?” General Penumbra sounded frustrated. “Princess, forgive me if I’m overstepping, but you can’t exactly call out your sister for having a bigger flank than you!”

Spear stifled a snicker. Then he cocked his ear back toward the door, straining to hear Luna’s response.

“Perhaps not,” Luna said. “But there are other ways. We shall have to upstage her somehow.”

“But how?”

A low, throaty chuckle filled the room. “My dear Penumbra—surely you know how this all started.” Spear could just picture the smirk on Luna’s face. “We shall have to beat her at her own game.”

There was a pause—and then Luna laughed again. “Oh, you naughty mare,” she groaned, presumably in response to something Penumbra had done. “You’re excited aren’t you?”

Another pause. Then—”Mmff. Can I help it if royalty tastes so good?”

“You cannot.” Luna groaned again. “Please, continue.”

As another of Luna’s moans rang out through the hallway, Silver Spear decided to make a getaway. His cheeks were stinging; it felt like all of the blood in his body had decided to rush to two places: his head and his crotch.

So the rumors were true after all. And Luna—what was she planning?

Beat her at her own game.

How this all started…

Spear had a rough idea.

He came buckets that night, panting and moaning in his bunk as shot after shot of his load splattered the top of his bunk. The fantasized image of the two Princesses’ asses lingering in his thoughts, Spear groaned, got up, and went to clean off.

That was the messiest session he’d had in weeks. Somehow, though, he had a feeling that they weren’t going to get any cleaner. If anything, he thought with a small grin as he turned on the shower, things were only going to get hotter from here on out.

By some quirk of fate, Silver Spear woke up the next morning to a change in his schedule. Instead of patrolling the walls today, he was to preside over the weekly Royal Briefing—a meeting between the Princesses in which they were to discuss matters of state, foreign and local affairs, and any other political necessities.

That, at least, was the usual idea. From the moment Spear had walked in the room, though, it had become clear that this meeting was less a collaboration than a thinly veiled competition.

A helpful forecast had included Luna’s newly expanded assets. Just as he’d overheard her promise the previous night, and just as he’d daydreamed about on the way over, the lunar princess seemed to have taken the opportunity to grow her feminine features far past what she had started with.

She’d leapfrogged over Celestia’s own size, entering the room with a pair of basketball-sized flanks wobbling and bulging madly from her rear. She swayed her hips as she walked and talked, constantly swishing her tail playfully over the massive crevice that ran down the middle of her expansive rump. It was an incredible struggle for Spear to keep from imagining what lay behind that teasing tail. He was determined to keep his mind clean—at least until he could scramble back to his bunk.

He was, of course, doomed to fail.

Presently, they were discussing public relations—though not quite in the expected way. “Have you met personally with any of Our subjects lately?” Luna asked. “They seem most eager to please their royalty.This generation is most pious.”

“I’m sure,” Celestia said placidly. She sipped her tea, eyeing Luna’s rump with an unreadable expression. “I always enjoy meeting with everyday ponies—but too much interaction with a single monarch can encourage a kind of...single-mindedness, I would say.” She paused. “I prefer to provide them with other sights to...enjoy.”

Spear’s eyes widened as he saw a golden aura spring up around Celestia’s horn. It was almost too faint to see, but from the way Luna’s smug grin turned to a frown, he could tell that she’d seen it too.

“Mmff,” Celestia murmured, her eyes fluttering shut. Spear watched in awe as the same golden aura sprung up around the Princess’ rump. He was mesmerized, powerless to look away as Celestia’s bountiful butt grew even more so, adding on pound after pound of plumpness as it rounded out beyond any reasonable size.

Her Cutie Marks stretched, her hips filling out. By the time she’d finished, Celestia’s ass was a good inch wider in radius than Luna’s. She smirked and shot Luna a meaningful look.

“I’m sure that our subjects enjoy the additional stimuli.”

“Of course they do,” Luna said. “But it must be proper stimuli. In the right amounts. If one is not impressive enough, there is a danger of one’s subjects becoming…”

She smirked. “Bored.”

Spear’s eyes tried not to pop out of his skull. Luna’s rump was becoming even bigger, her flanks widening by the second. She took a deep breath and shivered, every square inch of her voluminous flank set jiggling by the motion. It only stopped growing when it was just a smidge wider than Celestia’s, as if she were daring her sister to take up her challenge.

“Perhaps,” Celestia said, “but it is for our subjects to decide the kinds of...entertainment that they prefer.”

“We would not dispute that,” Luna said.

“Good,” Celestia said, smiling. “Because we seem to have one of ‘Our’ subjects right here.”

Oh, crap.

Luna’s eyes flickered over to Spear. A predatory grin twitched her muzzle. “We do indeed.”

He began to sweat.

“What’s your name again, dear soldier?” Luna purred. She turned to face him, her eyes narrowed, and her grin wide.

“S-silver Spear,” he choked out.

“Silver Spear,” Luna said, tasting the name. “A very...interesting name.” She took a step toward him, her long eyelashes fluttering. “It conjures up quite...interesting imagery.”

He swallowed. “What...kind of imagery?”

“Oh,” she said flippantly. “You know.” She began to move toward him, sauntering slowly across the carpeted floor. Her eyes were half-lidded, and her magnificent rump smacked against her hock with every sway of her hips. “Tell me, dear Master Spear. Won’t you help us settle an argument?”

“A-an argument?”

“My sister believes herself to be the more…” Luna paused, considering. “Attractive monarch. I…”

Once she’d gotten close enough, her muzzle was right beside his own. A shiver went down his spine as her lips brushed against his ear.

“...disagree.”

Luna continued past. It was impossible for Spear to keep his eyes off of her rump, especially when her big ass bounced against his shoulder, knocking him a few inches to the side. He grunted, steadying himself in place.

His mouth felt extremely dry for some reason. Swallowing, Spear closed his eyes and said, “I—I’m not sure I’m qualified for that.”

“Of course you are.” Silver Spear was powerless to keep his eyes closed at the sound of Celestia’s soft, rich voice. The sun princess took a step closer to him, her delicate waist curving below her vast, plush rump. “You’re a healthy, virile stallion, well into the prime of your life. And we…”

“We are two beautiful mares.” He could almost hear Luna’s smirk. “Surely there is no pony better qualified. Unless…”

“Unless what?”

“Well,” she said, sounding amused. “You do like mares, don’t you lieutenant Spear?”

Spear gulped. Don’t pop a boner, he told himself. Don’t pop a boner. Whatever you do, don’t—

Something very long, very heavy, and very hard plopped out of its sheath. Spear silently cursed as he felt his “spear” smack against the inside of his thigh.

Dammit.

“Um,” he said, somewhat shakily. “Yes, I do.”

Celestia smirked. He’d have bet anyway that she knew exactly what he was feeling right now. Her butt bouncing, steadily swelling and wobbling as she moved, she stepped toward him. “Then surely you can recognize a mare’s ideal figure,” she said. “Perfectly shaped—a body so curved, so plumped, that even the slightest stretch—”

She pushed her forelegs forward and straightened out her back legs, thrusting her big, round ass up in the air behind her. Celestia groaned as she stretched, her long legs popping as her rump jiggled madly above her. She didn’t finish her sentence. She didn’t need to.

Spear stared. It was a conscious effort not to drool. Could that really be his monarch—his princess—giving him that knowing, sultry smile? He felt like his world had been turned on its head.

Luna came up beside him. He could feel the side of her head nuzzling into his. “Perhaps this is not the best place or time to ask these questions.”

Part of him cheered. Another part sobbed.

“Then where?” Celestia asked, pulling back up into a more respectable position.

Luna mulled it over, then brightened. “Perhaps the Autumn Ball tomorrow night?”

Silver Spear was extremely aware of Luna’s rump beside him. Her ass was smushed against his side, her enormous flanks plumping out around his own haunches. It was so soft, folding around his flank and squishing into his coat. His boner throbbed.

“There’s an idea,” Celestia murmured. “He would be able to see first-hoof what other ponies think, and judge accordingly.” She nodded. “I can see the appeal.”

“Excellent.” Luna smirked at Spear. “You shall make a most excellent judge, good soldier—do you accept?”

Welp. To a question like that, how could a stallion possibly say no?

The next night, Silver Spear found himself standing beside Celestia in the foyer the palace ballroom. The two stood at the top of the ballroom staircase: Celestia in the center, greeting each guest, and Spear to her side, clad in his armor and watching for any threats or disruptions.

Ostensibly, anyway. The room was abuzz with conversation and festivities, but Silver Spear found himself utterly unable to focus on anything besides a certain Princess’s features.

His eyes were unfocused, his every nerve tingling with a nervous buzz of pleasure and anticipation. Celestia’s voluminous rump was positioned against his own, her oversized Cutie Mark rubbing against his side. The soft, plush feeling of her rear against his kept his boner at full mast—he’d promised himself not to lose control, but those hopes were fast becoming a distant memory.

At least he couldn’t feel the full sensation of the Princess’ rump. She’d dressed for the occasiona, covering her lower body with a sunny-looking dress that shimmered in the light of the chandeliers. Still...there was just something about the way the fabric shifted across Celestia’s flank that drove Spear’s daydreams wild.

His fantasies, though suppressed, constantly simmered beneath his stream of thought. A daydream about massaging Celestia’s rump bubbled up between greetings. Spear swallowed, imagining himself rubbing circles around the Princess’ ass, her plush rump folding over his hooves. And then, he’d ask—like a gentlepony, of course—whether he might help her out of her dress.

And she’d laugh, of course, with that rich, sweet laugh of hers. And with her eyes half-lidded, she’d say Of course, and flaunt her magnificent ass toward him, inviting him to squeeze it, to hold it, to hotdog his throbbing cock between her impossibly plump flanks—

“Hello. Am I late?”

Silver Spear nearly jumped at the sound of Princess Luna’s voice. But Celestia didn’t sound surprised at all.

“No. Right on time, in fact,” she said warmly.

Spear’s gaze twitched over his shoulder. Luna stood to his side, clad in the most dazzling dress he’d ever seen. It was a deep, velvet blue, clad in shimmers resembling stars. The fabric itself was perfectly figure-hugging, clinging to her every curve—and, given that this was Luna, there were quite a lot of them.

Her butt, if anything, looked even bigger than it had yesterday. It was visible above her shoulders, her slender waist curving up into an overly-generous rump.

Luna tracked his gaze and offered a knowing smile. “Ready for a night of entertainment, Lieutenant Spear?”

He nearly choked. “W-what?”

“Why, from our subjects of course.” Luna didn’t miss a beat. “Their reactions should be most entertaining.”

“Ah,” he said. “Yes. Sure.”

They certainly were. Wide eyes and blushes were the formula of the evening; more than one stallion looked ready to proposition either of the Princesses, but all thought better of it. Hasty compliments filled the air, each passing pony both eager to hide their interest and reluctant to leave. A distinguished looking gentlepony—Fancy Pants, Celestia called him—made the deepest bow Spear had ever seen and informed the two Princesses that they looked “absolutely ravishing.”

“That flatterer,” Celestia murmured as he left. A smile played across her lips. “His marefriend is a very lucky filly.”

“Very lucky,” Spear mumbled. “Yes.”

He’d never felt so lucky and cursed at the same time. Between both Princesses, he was pinned against a pair of super-sized rumps the entire time. Spear was forced to endure the two royal rumps rubbing against him throughout the entire evening, their weighty masses squeezing him from either side. It continued even as the greetings ended and the mingling began; neither alicorn, it seemed, was interested in letting him have a moment to himself.

His imagination ran rampant; as the night stretches in, sweat actually began to roll down his forehead. It wasn’t just from his armor—controlling himself was becoming more and more impossible by the second.

The things he would do to them if he could. The things they would do to him if they would. But they were the Princesses—how could he even think—?

But that night with Luna, he remembered. With the general of her Guard. Surely—

—surely it wasn’t completely impossible?

His heart beating like a runaway drum, Spear felt an overwhelming sense of relief when the night finally ended. He felt like his nerve was about to break—but as the last ball-goer finally left the hall, he visibly deflated in relief.

“Lieutenant Spear?”

He perked up instantly at the sound of Celestia’s voice. “Yes, Princess?” he said anxiously, blinking up at her.

She smiled down at him. “You’ve done an admirable job this evening. Why don’t you return with us to our quarters?”

“Your...quarters?” he asked.

“Oh, yes,” Luna piped up. She gave Spear a smile that was absolutely full of promises. “Have you forgotten of the competition?”

He had.

“We need to hear your...mm.”

Luna leaned forward, her lips nearly brushing against his ear.

“...judgement.”

Following the Princesses back was an absolute no-brainer. Then again, Spear reflected, a particular something throbbing between his legs, he wasn’t exactly thinking with his brain at the moment.

When they arrived, Spear’s heart nearly stopped when he realized that they’d entered a bedroom. Could this be—that is, could it mean…?

But no immediate invitation was forthcoming. Luna hopped up onto and lounged back on the bed, her plush rump sinking down against the mattress. Celestia merely climbed onto a sofa and tucked her legs underneath her, watching Silver Spear intently. He was happy just to stand in the center of the room, though it was a struggle not to gawk as the pair removed their gowns.

“So,” Luna said, breaking the silence. “Tell us—how would you describe the reactions of our subjects tonight? To our new forms?”

“Oh,” Spear said, almost babbling his words, “they were astounded. Truly impressed.”

“Oh?” Luna arched a single eyebrow. “How so?”

“Well, I’m sure that they’d never seen anything like it. Like you,” he amended, coughing. “The both of you possess royal figures in all of the ways possible.”

“Go on.”

“Such perfect curves,” Spear said. To hell with caution, he told himself. “I don’t think that there’s a straight-minded stallion in Equestria who, before tonight, had seen a figure as feminine and perfect as yours. After tonight, I doubt that there’s a single mare in the nation who soon won’t want to be you—even more than they did before, that is.”

“Now that is flattery,” Celestia said mildly. She smiled at him. “Now tell us what you thought.”

“What I...thought?” he said, hesitantly.

“Oh, yes,” Celestia said. “Do hold nothing back.”

“We want to hear everything,” Luna purred.

Silver Spear did his best to meet Celestia’s gaze evenly. He utterly failed. What was unmistakeable, though, was that those eyes already knew exactly what he thought, what he had seen. She just wanted to hear him say it.

He took a deep breath. Then he’d be more than happy to oblige.

“I think that the two of you are beyond beautiful,” he began. “I’ve never seen a mare with figures as bestowed, as blessed with curves as you—the two of you.” He chuckled wryly. “I’ve considered myself an incredibly lucky stallion tonight—I’ve actually been able to accompany my Princesses, to be by their side, and to...well.” He coughed. “To feel their bodies pressing against my own.”

“Our bodies, hm?” Luna said. “What parts?”

“Your—” That was when he realized he couldn’t stop it; it was all going to come pouring out of him, whether he wanted it to or not. “Your rumps, your posteriors, your flanks. They’re the plumpest I’ve ever seen—rounded and curved, so taut, managing to hold all of their mass inside, but so plush as well.”

He swallowed. “I just take one look at them, and instantly want to touch them, to play with them. To...well, experience your enjoyment of them. With you. And to—”

A deep blush stopped his last phrase. Nonetheless, Spear stood resolute, holding firm to what he’d said.

Celestia gave Luna a smile. “Honesty is a prized trait in a guard, is it not, Luna?”

“Indeed, sister,” Luna said. “Tell us, Silver Spear: How do our rumps truly make you feel?”

“I’ve never been more turned on in my life,” Spear blurted. “Forgive my disrespect, but I take one look at them and...well, I can scarcely control myself. And my thoughts—my daydreams…”

Celestia laughed. “You’ve been anything but disrespectful, Silver Spear.”

“Really?”

“You’ve told Luna and I exactly what we wanted to hear.” Celestia’s smile widened. “Now, you mentioned touching them—would you like to?”

Silver Spear’s mouth went dry as Celestia hefted her flank up a few inches toward him. It jiggled incredibly, mesmerizing him. In fact, he didn’t even realize that he’d moved toward her until he was standing beside the sofa, Celestia’s marvelous, immense ass filling his vision.

“Well, go on,” Celestia said. “It doesn’t bite.”

It was time to throw away his inhibitions, and let his instincts—or his lusts, it seemed—take over. Spear bit his lip, raised a hoof, and then planted it right over Celestia’s Cutie Mark.

It sank in deep, the soft flesh of Celestia’s flank depressing easily beneath the weight of his hoof. Spear exhaled slowly as he squished Celestia’s rump, slowly rubbing his hoof in circles around her Cutie Mark as he savored the touch of her coat against his.

“Mm,” Celestia murmured. “It’s been too long since a stallion took it slow with me.”

Her buttcheeks were almost as wide as Spear’s hooves spread apart, and resembled nothing less than two huge, fluffy marshmallows. As Spear ran one hoof down the side of her flank, Celestia gave her rump an experimental bounce, her cheeks jiggling almost as though they were alive.

Spear bit his lip, then gave her rear end a playful prod. The sensation of rolling flesh was almost too much for either of them to take: Celestia moaned softly, her whole body shaking; Spear just groaned, his crotch throbbing as he took Celestia’s oversized rear in his hooves.

“Mmff,” Celestia murmured. “That feels wonderful. Why don’t you—”

She paused. Spear froze. His boner, hidden and denied for so long, had given up on waiting. It had slipped up and between Celestia’s ass cheeks, his hard, throbbing length a massive contrast to the plumpness of Celestia’s vast rump.

“Princess! I’m sorry—” Spear blurted, but Celestia held up a hoof.

“Don’t be,” she said. “How many times must we tell you?”

“We like your excitement,” Luna chimed in. Spear glanced over to the bed, his eyes widened. Her hoof was planted firmly between her legs, slowly rubbing in circles around what could only be her marehood. “Even a princess likes to feel...mm...desired.”

“And in return…”

A smirk crossed Celestia’s face. She tightened her flanks, squeezing Spear’s member in the vise of her rump. He gasped.

“...we’ll be more than happy to make you feel good as well.”

His cock sandwiched between the pillowy warmth of Celestia’s magnificent, squishy buttcheeks, it was all Spear could do to keep from orgasming right there. His upper body seized up all the same, his hooves clamping down hard around Celestia’s Cutie Marks. “O-oh, Princess,” he sputtered out, groaning softly. “You’re so—soft.”

He instinctively thrust his hips forward, embedding his length between the titanic globes hugging it. They were smooth—so smooth, and the feathery softness of her fur only brought his arousal to new heights.

“Mmff,” Celestia murmured. Her eyes fluttered, and he could tell that she was getting into it as much as he was. “I do try.”

She glanced back over her shoulder at him and smirked. Lifting up her cheeks, she let them over for a moment, settled around his flare—and then slammed her butt down again, drawing out a blissful groan.

“Now, this is no fun,” Spear heard Luna whisper into his ear. He struggled to turn his head to face her, then gasped as he felt her hoof sliding over his own rump. “Does only my sister get the attention? Or do I…”

Her hoof slid up Spear’s back, then curled around his neck. His eyes widened as he felt her pulling his head to the side.

“...need to take charge?”

Spear’s lips melted against Luna’s, their muzzles pressing together as she dove hungrily into a kiss. Her hoof held his head tightly against his, her breath hot and sweet against his as her foreleg stroked across his mane. And all the while…

All the while, his mind was awash in the sensation of his crotch—tight, hot, incredible. Spear kissed Luna back even more fiercely, his thoughts swimming in the mind-shattering sensation of having his dick hotdogged by Celestia’s blubberous flanks.

Each time he bottomed out against her rump, he imagined his flare poking out above her hips by a good six inches—but no; Celestia’s massive, globular ass swallowed it all, surrounding his stallionhood by her supple, jiggling layers of fat and flesh. As he slammed his hips forward with a fleshy smack, Celestia’s immense mounds rippled as though he were fucking a platter of jello.

Celestia let out a moan she felt Spear’s girth pushing against her oversized flanks. That set his crotch throbbing; her followup, though, was what pushed him over the edge. She squeezed even tighter, her voluminous mounds folding in over one another and collapsing against Silver Spear’s shaft. He let out a long, muffled groan, his eyelashes fluttering as she teased his length. The pressure was building at the base of his shaft, swelling and growing until he could hold it back no further—

He came harder than he ever had before. His hips jerked madly, his thrusts going wild as his shaft unleashed rope after rope of his seed up over Celestia’s ass. It splattered all over the princess’ back, waist, and hips, fat globs of creamy-white cum matting her fur and sliding down the vast crevice between her flanks.

Celestia groaned, evidently savoring the sensation of Spear’s sticky mess slipping down her sides and rear. “Now that’s a happy stallion,” she said, grinning. “Mmff. I do so love to feel a stallion’s cum sliding down across my Cutie Marks.”

Glancing back, she stifled a chuckle. “Though I’ll admit that I’m used to seeing more of them covered,” Celestia said, smirking. “Considering their present size, though, I think you did an excellent job.”

“Thanks,” Spear said, panting as he pulled back from Luna’s embrace. He didn’t think he’d cum that hard in years. “That was...incredible.”

“Was?”

Spear started as Luna’s cheek brushed against his. “What’s that?” she asked, teasing. “Don’t I get a turn?”

She nudged his chin to face her, her eyes half-lidded. “Am I really so unattractive, dear soldier?”

“No!” Spear blurted. Now that he was facing her, it was impossible not to see the way Luna’s ass curved up above her slender waist—above, perhaps, even Celestia’s. As though he hadn’t just orgasmed fifteen seconds ago, his boner was instantly stiff and raring to go for another round.

“Not at all,” he protested, breathless. His stallionhood throbbed just at the sight of her. “I mean—I’d never—”

“Good,” Luna interrupted. Then she swept him up in another kiss, pulling him away from Celestia.

Spear grunted as Luna tackled him onto the bed, her heavier weight—especially around her rump—pinning him easily to the mattress. He didn’t care, though: he was too busy exploring her mouth, tasting her lips on his tongue, pressing her face against his even as she did the same to him. They tumbled together across the bed, their warm bodies pressing against one another until finally their lips separated, their bodies pulling apart, leaving Spear’s crotch planted directly over Luna’s massive, plush rear.

“Mmff,” Luna said, smirking. “Now here’s a position I might like to be in—pinned to a bed beneath the spear of an especially gifted stallion.” She clenched her buttcheeks around Spear’s member, eliciting another moan from him. “Not to mention the mass of my own—mm—rather expansive assets.”

“Gods,” Spear breathed, his hips jerking involuntarily. Hotdogging Luna’s ass felt incredible—better, even, than Celestia’s. His hooves roamed across Luna’s plush ass with an insatiable hunger to feel, to squeeze, to own. “You’re even softer than she is. And so warm—”

“As my sister said,” Luna said brightly, “I do try.” Her smirk grew. “Though I can be even softer.”

Spear groaned in disbelief as Luna’s butt actually began to grow around his shaft, her widening flanks swallowing up his thrusts. It was only by another inch or so, but by the time she finished, he had no doubt that he was hotdogging the biggest rump to ever exist in Equestria. He massaged Luna’s Cutie Marks, each one nearly the size of his head, and moaning all the while.

“Oh, gods,” he moaned. “You feel so good. I feel like I’m gonna—”

And just as that familiar tightness was beginning to build at the base of his shaft—Luna stopped. The tightness around his member disappeared.

“Stop,” she commanded.

“I—what?”

Luna’s sly grin told him everything he needed to know. “I don’t want to feel your seed on my coat,” she said, her teeth glinting. “I want to feel you inside me. I want you to fill me up like a proper stallion.”

“Old-fashioned,” Celestia chided from her sticky place on the sofa. Luna merely rolled her eyes.

“Go on,” she said. “Slip yourself inside me. I want to feel exactly how much I turn you on.”

Spear’s whole body shuddered in anticipation. Gritting his teeth, still yearning for that sweet release, he pulled his hips back and poked his flare through the cleavage of Princess Luna’s impossibly fat ass. It took some doing—each cheek was absolutely massive, and he nearly felt lost at one point—but eventually he felt his throbbing head slip into the warm embrace of Luna’s royal marehood. He groaned, his hips jerking forward.

His flare throbbed, a spurt of pre spattering against Luna’s insides as she shifted her ass around his cock. Spear’s breath caught in his chest as Luna clenched her buttcheeks around his tool—and then relaxed them, starting to fuck him with the strength of her ass alone.

Spear grunted with pleasure, again and again, as he rutted Luna silly. Their cries and moans mixed with the sound of sweaty, smacking flesh. His pleasure was only heightened as he felt Celestia’s hoof curve around his belly, her arm pushing between Luna’s ass and his stomach to fondle him.

“Praise us!” Luna howled, her gigantic flank bouncing with every thrust. “Praise our Royal Flank!”

“Your flank is—nff—magnificent!” Spear groaned. “F-fuck! It’s got to be the biggest in all of Equestria!” He pulled back his hoof and smacked it across Luna’s enormous Cutie Mark—hard. Luna cried out, her marehood moistening further around Spear’s member. “Never in my life have I seen a bigger—fatter—ass—fuck!”

The increased wobbling of Luna’s flanks from their spanking only aroused Spear further. In no time at all, he was whimpering, grunting, holding back his mounting orgasm—and then he could hold it no longer.

His thrusts went wild, his hips jerking crazily as he pumped his load into Luna’s cunt. He moaned again and again, spattering her insides with fat globs of cum as his heavy balls unweighted their load. Luna cried out with him, her own orgasm hitting her with the force of a train, her tender marehood contracting around his length, milking him for every last drop.

By the time he’d finished, he felt lightheaded; stumbling, he staggered and fell against Luna’s massive ass.

“Ugh…” Silver Spear groaned, his eyes fluttering weakly. He held up a hoof to his head, groaned again, then let it flop back to the mattress. He suddenly felt so...weak. Tired. Used-up—as though he’d just spent a week’s worth of pent-up energy. In a way, he had.

“F-fuck,” he mumbled, Luna’s massive rump depressing around his head and creating a rather magnificent pillow. “S-so big. So...so...soft…”

His eyes slowly drifted closed, his softening erection slipping out of Luna’s ass. The Princesses exchanged a look.

“Do you think we overdid it?” he heard Celestia ask Luna, just as she stifled a giggle.

“No,” Luna replied. Her voice was growing hazier by the second. She sounded smug. “I think we did a most excellent job.”

Groaning into Luna’s flank, and feeling it wobble gently beneath his muzzle, Spear slowly drifted off into the embrace of his afterglow.

“Perhaps we should do this more often.” Celestia sounded thoughtful.

“What? Bring stallions back to our quarters?”

“Perhaps. We never did get a proper ranking from him.”

“Oh?” Luna said, shifting her magnificent ass slightly beneath Spear’s head. She smiled to herself as his cheek sunk even deeper against her Cutie Mark. “I rather think that we did.”