“O-oh, yes.” Celestia’s moans and half-gasps echoed through the emptied streets of upper Canterlot. Her massive body jerked and twitched as, with each passing moment, her pleasure swelled within her. “O-ooh.”

Her massive wings, each one more than three hundred feet long if she extended them fully, quivered in anticipation. She loved it all: the tightness, the power, the feeling of more and more and more.

She could feel her little ponies eagerly lapping at every exposed corner of flesh on her body: her huge, throbbing nipples; her warm, spasming clit. A few ponies with a more interesting fetish had even taken to humping her feet, while a good dozen others had begun to massage her enormous, pillowy ass. Celestia felt her eyes open wide as she felt one pony’s body prodding up against her huge puckered asshole, then moaned as another squirmed a few feet into her marehood.

“Ooh, yes,” she moaned, rumbling in pleasure. “Yes! Please your princess!” Dreams of lust, fantasies of power and pleasure she hadn’t dared exercise in a millennium leapt within her as her blood sang with energy. With a cry that split the skies, she threw her head back and came, a waterfall of feminine juices rivaling Neighagra Falls in size cascading from her spasming marehood. All beneath her were drenched in sweet alicorn nectar.

Her voice hitting a high note of pure, ringing pleasure, Celestia let the growth take hold again. She stumbled, a shock wave of carnal joy riding whiplash through her spine as she nearly doubled her size again, going from six hundred and fifty feet to nearly a thousand feet in height in mere seconds. The ponies beneath her watched in awe as she stumbled again, her gargantuan foot falling outside of the city limits and finding purchase on the ground below.

Still shuddering as the heat from her last orgasm turned to the mounting ecstasy of her next, Celestia groaned and leaned her back against Canterlot Mountain. A small avalanche began between her shoulderblades and was swiftly stopped when the cascading boulders reached her big, growing ass. Her growing hips and rump stuck out massively around her tapered, toned waist, and her now relative T-cup breasts hung almost all the way down past her stomach, her twenty-foot nipples quivering in the warm night air as her breasts smushed against her chest.

Back down on the ground, Luna was panicking. She’d expected Celestia to at least have the good sense to leave the area by now, but if anything, her sister looked ready to fall back across the city. Her wings flared out behind her and she swooped toward the ground.

“General Armor!” she said. Her fall broke into a light jog, and she stopped a few feet away from the shorter stallion. “We’ll need a shield!”

Cadance was with him. “Working...on it!” Shining grunted. His eyes were all screwed up, and flickers of light purple magic were flickering around his horn.

Cadance’s grip around his shoulders tightened. “You can do it!” she said, pulling him toward her chest. “Come on, Shiny!”

A tired grin twisted Shining’s mouth. As Celestia stepped fully down to the base of the mountain, the top of her head just barely visible over the city walls, his horn flared. Luna watched, impressed, as a pink bubble shimmered into existence around the city.

“Astounding,” she said. “I saw your work at your wedding, but I must say again that I’ve never seen a proteomancer of your caliber.”

Shining grunted and offered her a smile. “Thanks,” he said. “That all depends on whether I can keep it up, though.” He blew out a breath and all but collapsed against his wife, the magic around his horn flickering out. “It’ll sustain itself for now, but it anything starts to actually damage it—“

Right on cue, the ground shook beneath their feet. Cadance’s eyes flew open wide. “Celestia!” she said. “We need someone to monitor her.”

“Of course, niece.” Luna clapped a hand on Cadance’s shoulder. “Stay here with him. Make sure he sustains the spell. If Celestia gets as big as I fear she might, his magic may well be tested.” Cadance nodded. Her wings flaring wide behind her, Luna leapt straight up into the air. She caught a residual thermal and glided easily down toward the edge of the city.

It was incredible, really, how much of Celestia was still visible, given that she was standing at the bottom of the mountain. Her earth-shaking groans still rent the air, though Shining Armor’s bubble reduced their volume significantly. Both her hands were back at her crotch, masturbating fervently as she added dozens of feet to her figure by the second. Her forearms, turned up toward her face, squished against the bottom of her enormous jugs, tonnes of titflesh oozing out around her biceps.

From her position just above and behind Celestia’s shoulder, Luna could even make out her older sister’s nipples quivering in pleasure, fully erect in the warm morning air. Every pump of Celestia’s fingers against her crotch matched with a thud of her broad back against the mountain behind her. Small avalanches began around her shoulder blades and huge, plump ass and hips. Luna watched in awe as her sister swelled up until her shoulders were fully above the city below.

The beating of wings reached her ears. Luna glanced over her shoulder and saw Twilight flying toward her, looking out of breath. Luna let herself drift down onto a roof, and Twilight followed.

"Enjoying the show?" Luna asked. She gestured toward her sister's enormous form. "It has been too long since I have seen Celestia truly embrace herself like this."

Twilight's cheeks blushed less, now that she'd all but openly humped the massive princess' breasts before, but they blushed all the same. "I...I guess," she said. "It really is something. I just, um, was wondering why she has to get so into it."

"Pardon?"

One of Celestia's low, rumbling moans split the air. Her massive form suddenly surged upward, adding hundreds of feet every second. She soared past one thousand feet, reached one thousand five hundred without breaking a sweat, and flew toward two thousand with the glee of an overeager filly.

Twilight shrugged helplessly. "That."

A smile curved Luna's face. "Ah," she said. Twilight's fingers, she noticed, were twitching toward her crotch. The bulge of a puffy, damp cameltoe pressed against the underside of Twilight's clothes, and she knew instantly what Twilight was asking.

She wanted to know why Celestia allowed herself such incredible pleasure—and whether it might be acceptable for her to follow. The poor filly wanted to allow herself to enjoy this, but some restraint, some measure of propriety still lingered. Luna's smile widened.

She knew how to help.

"It's unavoidable, really," Luna said, casually gesturing toward her sister's growing form. "A power like the Sun's is barely containable, and as a princess of this land, my sister must embrace her role as its matriarch. Really, hers is an expression of the power and fertility of all of the ponies beneath her; in a sense, she is this land." As Celestia's towering shadow fell over them, Luna stifled a giggle. "In more ways than one, perhaps.

"Given that this is something so innate to her," she went on, "is it truly so odd that she might embrace it? Such power, such size, energies coursing through her body as she grows beyond mortal comprehension?" Luna shrugged. "What pony could deny that?"

"I...guess," Twilight said. She still sounded doubtful. Another moan of Celestia's set her cheeks burning anew.

"Sexuality," Luna said, not unkindly, "is an innate part of every pony. It is only an invention of the modern age to deny it. Watching my sister now, embracing her size, her lust—it must be intoxicating, no?" It certainly was for her, now that she’d assured the city’s safety. It'd been far too long since she'd seen Celestia let loose like this, and she didn't doubt that she was just as turned on as Twilight.

Celestia's body thumped against the mountainside, and she groaned in pleasure. Up and up she soared, her enormous body growing past three thousand feet, never stopping as it added on a hundred feet in size every second. More and more ponies had gathered by the edge of the city to watch her, some slipping through the bottom of Shining Armor's shield to press themselves against parts of her massive, growing body.

Twilight swallowed. "A-a little bit, yes," she admitted. She bit her lip, her fingers twitching. Luna noted that her nipples were erect beneath her shirt, and saw a bit of dampness spreading through her crotch. In the distance, Celestia was kneading her fifteen-hundred-foot tits, each one hanging down nearly to her waist. Twilight’s pupils were dilated, and she was breathing slightly heavily. Luna saw Twilight's thighs rubbing against each other, the younger mare obviously struggling to keep from giving into pleasure.

Luna was more than happy to make the decision for her.

She swept the younger mare up in her arms and pulled her to her chest, their busts squishing together as a seven-foot Luna leaned down and took Twilight's mouth in her own. Twilight seemed shocked at first, but then she melted into the kiss, her mouth and tongue attacking Luna's as their bodies pressed hungrily together.

Satisfied, Luna pulled out of the kiss. Her arm still lingered around Twilight's waist, hand resting comfortably on Twilight's forty-inch hips. "Did you enjoy that?" she asked gently. The ground shook beneath them as Celestia surged up another two hundred feet.

"Yes," Twilight said, breathlessly. She reached up around Luna's neck and pulled her head back down for another.

As her sister and student were making out thousands of feet below her, Celestia was equally breathless. Her hips pounded against the mountain again and again; by now, she was vigorously humping its side as she grew and grew and grew. Now over four thousand feet in height, she was nearly as tall as the mountain itself.

A small army of pegasi had gathered below and between her incredible asscheeks, each one more than happy to pleasure their titanic monarch. Celestia’s eyes rolled back toward her forehead as she came—and the growth hit her once again.

As the earth shook beneath her, she more than doubled in size. Hundreds—no, thousands of feet—flowed onto her enormous body as easily as breathing. Up and up she went, her head pushing past the lowest cloud layer as she surpassed five thousand, six thousand, seven thousand feet in height. A mile and a half. A mile and three-quarters. Two miles—

Beginning from a thousand feet off of the ground, Celestia’s quarter-mile foot came crashing down onto the farmland below. She groaned, her hips shaking as the side of her waist rubbed against the peak of Canterlot Mountain.

And for miles and miles around, the earth quivered and shook.

Rainbow Dash grunted as she heaved the crate onto the back of the Apple family wagon. “Whew,” she said. “Think that’s the last one.”

Big Mac looked up from his spot behind his family’s marketplace stall. “Eeyup,” he said. “Should be.”

Dash wiped her forehead and grinned. “What a workout. Thanks for asking me to help out.”

“Thanks for helpin’,” Mac drawled. “With AJ visitin’ Brae, just one pony and all this work don’t really add up.” He coughed, brushing his hands off on his shorts. “So I appreciate it.”

“Hey, no sweat.” Dash flexed her bicep and gripped it in her other hand. She grinned wolfishly. “I’d never leave my friends hangin’.” She paused, smirked. “Y’know, actually—”

She let out a sudden yelp and tumbled as the ground shook beneath her. Big Mac tried to catch her at the same instant that her wings flared out. Instead of either being caught or darting up into the air, Dash instead found herself with one wing smushed under Big Mac’s chin and the other twisted awkwardly beneath her arm. The two of them let out a pair of grunts and collapsed to the ground in a heap.

“The f-fuck,” Dash slurred, “was that?” She tried to keep herself from blushing. The fall had finished with her collapsed on top of Big Mac’s prone form, her ample chest rubbing up against his big, beefy pecs. Completely failing not to flush, she twisted her hips to the side and froze when she felt a rather sizeable bulge rubbing up against the inside of her thigh. She planted the palms of her hands on the ground on either side of Big Mac’s torso and pushed herself halfway up.

Big Mac shrugged. Dash’s head twitched to the side when she heard somepony holler out:

“Over there!” A wide-eyed, quivering stallion was pointing at something in the distance, past the edge of the marketplace. “O-over there!”

The two of them turned to look. Dash’s eyes widened, and she heard Big Mac gasp. There really wasn’t any other reaction to be had.

For all its reputation as a backwater town, Ponyville was actually one of the closest settlements to Canterlot itself. On a clear day, a pony on a tall roof or on the edge of town could see all the way to the base of the mountain. The peak, except on days when it vanished into the clouds, was always visible as the tallest object for miles around. Except, it seemed, for today.

At first, Rainbow Dash wasn’t quite sure what she was looking at. A thick mass of white had covered the front of the mountain; at first, it just looked like winter had come early. Then she saw the “mountain” twitch and realized that, not only was it only one of two white masses, but that the original mountain was still visible behind it.

Dash felt her throat go dry. She heard Mac gulp. Their gazes moved up...and up, and up. She looked up past the top of the mountain and swallowed when she saw that the mass of white just didn’t stop—it kept going, up far past the top of the mountain.

It took a moment for her to recognize the massive shape as a person. It took another moment for her to recognize the person in question.

“Princess Celestia?” Dash whispered, shock dripping from her every syllable. Below her, Big Mac whinnied in surprise.

The Princess—if it was her, that is, and not some giant monster that just looked like her—towered over the landscape. The mountain itself just barely reached the tops of her thighs, and as Dash watched, her nostrils flaring, the monstrous Celestia opened her mouth slightly and slid the inside of her leg across the mountain’s peak. A good five seconds later, Celestia’s moan, a low, rumbling sound that echoed through the air, reached Ponyville. Dash’s pupils dilated, and she felt her heart beat faster.

A titan of size and power, Celestia loomed above the mountain and farmlands below her like...well, like a goddess. Rainbow Dash gulped, a heat stirring in her loins as she watched Celestia’s massive breasts sliding past one another as the princess rubbed her enormous clit along the mountaintop.

Dash took a deep breath. A feeling of warmth, of awe, and of lust filled her lungs. Just looking at that titanic figure, she could feel something stirring within her and setting her mind and nerve endings alight. She’d never seen anything of such raw size and sexuality before.

She’d never been more turned on in her life.

Celestia’s whole body was trembling as she lowered herself onto the peak. Her breaths were coming in short, sharp spurts. She steadied herself, squatting, her bare feet gouging out deep canyons in the earth below. Her lips quivered as the very top of the mountain brushed against her aching pussy.

It’d been so long since she’d done this. Too long. A rough-and-tumble in an unseen valley, a lustful tryst with an unsuspecting tree...none of that compared to the sheer, unrelenting eroticisim of fucking one’s self with the peak of a geographical landmass.

A few hundred feet of Canterlot Mountain slipped inside of her dripping, needful cunny. Celestia whimpered as her thighs squished against her quads. Her big, soft ass pressed against the side of the mountain, leaving deep depressions anytime she shifted her weight. It felt so good to feel the mountain stretching her already; it was so much better than her own fingers, however skillful they may be. She closed her eyes and gave a little cry as she forced herself a good thousand feet down the mountain, her pussy winking madly as it clenched around the full size of the summit.

She stroked her belly gently, moaning under her breath as she felt the burning tightness inside of her. She was at the limit of what she could take, and hadn’t even pushed her way down more than a quarter of the mountain. “Yes,” Celestia groaned, savoring the girth of her impromptu dildo. “Ooh, yes.”

As a side-branching peak brushed against a particularly sensitive part of her cunt, Celestia’s whole body shivered and—once again, began to grow. She moaned deeply, humping the mountain as she grew and grew and grew, passing two miles and nearly reaching three. Her marehood widened, opened, gaping impossibly wide as it swallowed more and more of the mountain below.

Shining Armor watched, mouth agape, as a pussy the size of Canterlot Palace winked down at him.

“This isn’t happening,” he breathed. “Holy crap, this isn’t happening.”

A surge of feedback burst out from his shield, and he shuddered. Bolts of electricity lanced down his horn, and he felt his magic spasm. Earlier, he’d prayed that his magic would be enough to protect the city from Celestia’s incredible weight. Now, it looked like it was being put to the test.

If this was a test, though, it was one that he was failing.

Shining Armor groaned audibly, twitching as his magic struggled to hold up millions and millions of tons of weight. All around him, similar groans filled the courtyard. Instead of pain, though, these reflected pleasure; more than one citizen, rather than rioting, fleeing, or panicking, had broken down under the sight of the massive Celestia pleasuring herself with the city itself—or rather, as close as she could come to the city, seeing as Shining’s bubble stuck out just far enough from the side of the mountain to prevent her from descending over it. Moans of pleasure, of orgasm, and of mindless sex filled the air around him.

Shining let out a cry of pain as Celestia’s growth suddenly surged, adding on another five hundred feet and untold thousands of tons as easily as breathing. The part of the shield directly above them began to groan, cracks spiderwebbing across its surface.

“I—can’t,” he wheezed. “She’s just—too big.”

He felt Cadance’s hands on his shoulders. “You can do it,” Cadance said seriously. “I believe in you.”

He tried to grin. “Sorry, Cadance,” he said. “But against something that huge, just one pony can only do so much…”

Cadance frowned worriedly, then winced as a particularly large groan set a canyon of cracks seeping across the center of the shield. “There must be something.”

Then her eyes lit up. “That’s it! Just one pony!”

“Honey, what’re you—” Shining found himself cut off suddenly as Cadance mashed her lips against his. He all but melted into the kiss, his tongue dueling with hers—then pulled out of it violently, sputtering.

“What the hell!” he said. “You could’ve broken my concentration! And then what would have happened to you!” His eyes were wide, wild, afraid.

“But I didn’t,” Cadance said. She pointed up at the sky. “Look.”

Shining did. He gaped. Several of the smaller cracks were healing, and even some of the bigger ones looked less severe. His magic felt...steadier. Stronger. Deeper. He met Cadance’s eye.

“Our love served us a source of power once before.” Cadance cracked a smile. “What’s the harm in trying once more?”

Shining thought again of the incredible weight above him—and then pushed it out of his mind. He couldn’t think about that. He had to trust Cadance. He offered a shaky grin in response. “Okay,” he said. “It’s worth a try.”

His throbbing erection, of course, had absolutely nothing to do with the decision.

This time, when her lips met his, he gave into the kiss completely. Her lips were warm against his, her tongue soft and wet. He let his arms snake around her waist, groaned as he felt her nipples squishing against his broad chest. She leaned forward and touched her horn to his. Suddenly, power surged through him, electricity crackling between the tips of their horns as they kissed.

In the back of his mind, Shining felt the cracks recede even further and smiled to himself. Maybe Cadance was right. This could work out.

It had to.

Shifting her hand to Mac’s thigh to better push herself away, Dash froze when she felt the inside of her thumb brush against a large, throbbing bump in the stallion’s pants. Her legs quivered faintly, and she felt a sudden wetness between her legs.

She swallowed, unable to tear her eyes away from Celestia’s heaving, massive figure. Watching a giantess larger than a mountain pleasuring herself with said mountain had never been high on her list of fetishes—but maybe, she was starting to think, she’d been missing something.

“Fuck,” she said. “That’s fucking hot.”

She could hear Mac struggling to keep his voice from shaking. “E-eyup,” he said. His erection throbbed even harder against her thumb. She could actually feel a spot of dampness through the fabric of his pants.

“How the hell did she get that big?” Dash breathed. Maybe it was the natural outcome of the question she’d wanted to ask Mac earlier, or maybe it was a natural—or magical—consequence of seeing such a gigantic, sexual titan bestriding the earth. Whatever the reason, she could feel her arousal and lust battering against the sides of her clouded mind like waves crashing against a shore. She wanted the sex that Celestia’s massive body so casually oozed out, needed it more than anything else in the world.

And maybe, just maybe, Big Macintosh was willing to provide.

She felt his weight shift beneath her as he shrugged. “I—I dunno,” he said. His low, masculine voice suddenly sounded incredibly hot.

Dash licked her lips. Her thumb and forefinger had begun to trace tiny circles along the edge of Mac’s bulge; as she spread her fingers wide and let her palm rest directly on the python now visibly snaking down Mac’s pant leg, she nearly gasped at its sheer girth. Mac gave a cute little gasp as she gave his stallionhood a squeeze.

“Fuck,” she said again, unable to look away as the distant Celestia positioned herself above the mountain. “What must it be like? To be that big, that huge, that fucking sexy—” She didn’t even realize that she’d spoken the last words until Big Mac gulped and said, somewhat shakily:

“Yeah.”

“Kinda…” Dash’s fingers left Mac’s bulge and moved upward to trace along the outline of his abs through his shirt. Fuck. She’d always known how big he was—no matter how hard he tried, Applejack had said, Mac had never really been able to find a shirt that fit him properly—but now she marvelled at being able to feel his steel-cut abs through the overstretched fabric. Her fingers roamed up another foot or so to the bottom of his pecs. Her fingers curled around it, felt that steel-thick slab of beef, then absentmindedly made their way toward his nipple. Her own nipples, she realized, were achingly stiff and damp. “Kinda turns you on, don’t it?”

Mac shook slightly beneath her. “E-eyup.”

She paused, then glanced down at him. His pupils were as dilated as hers, and he was panting slightly. In that instant, a bolt of electricity seemed to zap between them.

And then she was moaning, grunting, snorting as she tore at his clothes, with him tearing at hers, rolling, touching, squeezing as the two of them gave into their lust completely.

Beneath them, the ground shook.

Celestia was growing again.

Shining let out a groan somewhere between pleasure and pain as the giantess above the city nearly doubled in size. The weight on his shield went up by an order of magnitude—and just like that, he felt it weakening again, the spell retreating into a splitting headache.

“It’s not—working!” he groaned, pulling away and gritting his teeth. “I—I can’t handle it.”

Cadance stared at him, wide-eyed. “You’re sure?” He nodded. She took his cheeks in her hands, then knelt her forehead against his. “Then...that’s that.” Her voice was soft and small. “I’m all out of energy myself.”

Shining chuckled, shaking his head sadly. “At least there’re worse ways to go,” he said. “Getting crushed beneath the ass of a rampaging goddess is, as far as dramatic deaths go, pretty damn hot.”

Cadance giggled, her hands wrapping around his waist once more. He groaned as he felt her squeeze his tight ass, then wrapped his fingers through her hair and took a good, long sniff of her scent.

“If that’s how it’s going to be,” she murmured, nuzzling into his shoulder as he stroked her mane, “then we should at least enjoy the moment.”

Far above them, Celestia’s mountainous marehood was slowly drawing into position above the city. Given her size, her lack of speed wasn’t surprising; any “normal” speed movement may well have broken the sound barrier. Great globs of femcum fifty feet across dripped down onto the bubble below, its bright pink surface shaking with each collision.

It took only seconds for them to strip off each other’s clothes. By the time they were done, Shining had taken Cadance in his arms, his throbbing erection pressed tight up against the side of her thigh.

“Gods,” he murmured. His finger trembled as it drew small circles on her back. “You turn me on.”

“More than that?” Cadance asked, nodding up at the titanic figure above them. Shining cracked a smile.

“Always.” Then, his teeth latched gently onto her earlobe, he squeezed her rear and eased himself inside of her.

Cadance let out a cute cry as Shining entered her. His warmth was one of the most familiar feelings in her life; she clung to it, embraced it. Her warm insides spasmed, wrapping themselves around Shining’s length as he entered her again and again. His stallionhood, larger than most any other stallion’s in the nation, filled her more completely than anything she’d ever known before. She could hear her own voice crying out, shaking with joy and pleasure as he stretched her with his girth.

She felt herself shaking, her breasts heaving as she felt herself go over the edge. “Oh—oh—ooh!” Her whole body shook, lurching in Shining’s hands as her orgasm hit. She jerked forward and latched onto his bare shoulder, her lips suckling onto the bare skin she found there. He just groaned, his tool throbbing inside of her, and withdrew for another thrust.

Far above them, Celestia’s monstrous marehood had paused in its ascent. The image of the princess’ titanic ass, a pair of round, soft globes so large as to blot out the Sun, filled the entirety of the Canterlot sky. A long, low moan deep and rich enough to measure on the Richter scale shook the ground beneath them.

And then she began to descend.

Cadance’s breaths came short and choppy, her lungs feeling like they were burning as Shining speared her on his member again and again. She could feel her spasming cunny filling with his precum. She let out a cry each time he bottomed out inside of her, his heavy, churning balls slapping against her thighs with each thrust.

Her body twisting, grabbing, panting, Cadance shifted her weight and threw her arms around Shining’s shoulders. The ground was beginning to darken around them now, Celestia’s descending marehood the only thing that mattered anymore—to most ponies, at least. To Cadance, Shining’s member was her whole world, his warm precum the ocean that filled her warm, aching marehood.

She let out a whimper as she felt him bottom out inside of her, then met his lips in her own in one final, heavy kiss. She took his tongue in her own and squeezed him to her chest as he pulled out and thrust into her one final time—

Shining let out a grunt, a roar of pleasure as his shaft bulged impossibly wide inside of her. Cadance cried out, moaning as his swelling girth stretched her out wider than she’d ever been stretched before. Ropes and ropes of thick, hot cum started to flood into her, his tool spattering every square of her insides with globs of its hot, creamy batter.

Cadance was screaming, and Shining was screaming too, their pleasure mixing in a single hoarse cry as their conjoined orgasms blotted out the rest of the world. Their bodies shuddered and lurched as one, Shining’s cock throbbing as more and more of his seed erupted inside of her. She felt her stomach beginning to swell, her womb filling up with more and more of his cum, his heavy balls slapping against her rear as his musk and scent filled her lungs. She grabbed a hold of his mane and pressed herself even tighter to him, their worlds merging as pleasure soared within them.

Their horns touched. Lightning crackled. Shining’s voice swirled with the roar of his magic as the force of their orgasm, the force of their love, joined with his spell. His horn blazed with power. Far above them, the shield glowed a bright, joyous pink. The cracks were receding fully. The wounds were being healed, the bastion standing tall once more.

And then, as Shining’s next load of cum began to splatter against Cadance’s walls, the shield did something unexpected.

It began to expand.

Celestia was in heaven.

She couldn’t remember the last time she’d allowed herself to get this big. She’d nearly breached a paltry mile a century or so ago, but after reports had flowed into the capitol about giant monsters around the mountains of Vanhoover, she’d resolved to keep to the sub-thousand range. Being hundreds of feet tall had its perks, admittedly, but it was absolutely peanuts compared to pleasure that came with a size measured in miles.

Celestia squeezed her heavy breasts, which by now were hanging a few hundred feet (“inches,” to her) below her waist. They stuck out in front of her by about a mile each, blotting out the light for acres of farmland below.

Her marehood spasmed, and Celestia groaned as another wave of pleasure stirred at the base of her spine. Canterlot Mountain felt so good inside of her; she’d just bottomed out on top of it. She savored every twitch of its crags and peaks inside of her, slowly pumping her hips up and down to keep the sensation of fullness. Her massive thighs, which were half-covered by the part of her rump that had folded over her haunches, her fat, rounded ass-meat bulging obscenely behind her hips.

Unfortunately, that sensation of fullness was short in lasting. Just as Celestia felt the mountain bottom out inside of her for a second time, she felt the growth coming again. The Sun’s power sang in her veins as more and more magic swelled up inside of her chest, pushing her to greater and greater heights. She swayed, stumbled, her magnificent plot thudding to the ground as her city-sized feet were splayed out across the countryside.

She let out another moan, her body shuddering as the growth rode rampant over her. She passed four miles without breaking a sweat; then five; then six, her size nearly doubling again as the force of her orgasm rode through her. Her massive plot expanded across the farmland below, covering and crushing everything in its path.

Or at least, it would have, had a strange pink “carpet” not suddenly flowed out from beneath her. Celestia barely had the time to register its appearance before the pleasure surged inside of her again, pushing her past seven miles to eight. Even sitting down, she was head and shoulders above the clouds, and her magnificent breasts sat proudly in her lap. She cradled them in her arms, her lips twitching when she found that she couldn’t reach all the way around them anymore.

It was impossibly, incredibly hot.

But she still wanted more.

Shining Armor’s shield had done its work. Twilight and Luna, eyes wide, watched in awe as it spread out across all of Equestria. From horizon to horizon, the whole land was engulfed in a strong, glimmering light.

Twilight yelped as she felt a warm suddenly surge around her body. Then she stared in amazement as a shimmering pink bubble formed around her, then “popped” into a form-fitting shell barely paper-thick. She lifted a hand and marveled at how light it felt.

“Captain Armor has done good work,” Luna said. She held up a fist and grinned. “If these are the shields I expect them to be...then I suspect he’s given me a rather interesting idea.”

“What?” Twilight said. Luna leaned down and whispered it into her ear.

When she finished, Luna left Twilight blushing, but also beaming. “Let’s do it!” she said excitedly.

After stealing a kiss from Luna’s lips—the Lunar Princess felt a surge of glee in her chest at helping her sister’s student to open up so easily—Twilight opened her wings wide and took off. A second later, she vanished in a flash of light. Luna followed.

Across the surrounding area—starting in Ponyville, and some nearby villages but spreading out as Celestia grew to cover them—they roused the awestruck and often horny townsfolk to help pleasure their growing princess. Dozens of lustful ponies, driven by their peaking arousal and love for Celestia, took to the skies and roads. That soon swelled to hundreds, and then thousands, as Celestia grew and grew, her titanic form swelling to cover the entire countryside.

All wanted to see Celestia grow. And all wanted to help her get there.

Celestia’s titanic form writhed in pleasure as she passed twelve miles in size. Her marehood spasmed again and again, the sheer sensation of growth more than enough to keep her arousal in overdrive.

Lying down as she was, her feet stretched almost halfway toward Ponyville, and her head had begun to stretch toward the northern woods above Canterlot. The mountain itself was lost somewhere in her cavernous marehood, her gigantic rump covering the countryside for a good mile in all directions. As she groaned, shifting her weight as her arousal peaked again, her swelling rear rolled over farms, outposts, and houses alike, growing and covering everything in its wake.

More and more ponies, brought from all over Equestria by Twilight and Luna, had eagerly leapt onto her gigantic form, eager to pleasure her. Celestia’s lips twitched, her eyes squeezed shut, as thousands of tiny bodies rubbed, humped, and massaged her most sensitive spots. A small village had gone to work rubbing and squeezing one of her nipples. She hefted her breast in a hand, squeezing her titflesh between her fingers and moaning as a surge of pleasure soared up her spine.

How amazing this felt, she thought to herself, to be lifting so many of her subjects on just a nipple. How wonderful it was to know that so many were on her body right now. She didn’t know, really, what they were here for, but memories of Twilight humping her bust flashed through her mind. Her cheeks flushing, Celestia let out an earth-shaking groan, her back arching as the memory of her horny student sent her into orgasm again. A flood of marecum burst from her spasming walls, leaving a new, sweet-scented lake down the road from Ponyville.

She panted, her pale cheeks flushed a rosy red as she turned the memory over in her head. Twilight? But she’d never...hadn’t even thought of doing anything like that. Well, she’d thought of it; it hadn’t been unknown; but she’d never...quite…

The image of Twilight’s busty form, of her big, juicy rear just turned Celestia on even more. Another moan, low and throaty, shook the countryside as she more than doubled in size to thirty miles in height. Earthquakes erupted across the land with every shift of her toes; now at several hundred trillion tons, Celestia held enough power in her little finger to destroy all of Equestria if she chose.

But she didn’t; she couldn’t. How could she, when it had given her this much pleasure? She rolled over onto her stomach, then gasped when she felt her weight driving her bust into the ground. Deep craters, each one at least five miles across, were left in the earth below. Her massive breasts, now large enough to prop up her entire upper body and some of her hips, throbbed in time with her marehood. Celestia cried out in pleasure, humping the ground of Equestria itself as her sensitive tits echoed with sensation.

The pleasure drove her up to new heights; she passed forty miles and leapfrogged over fifty. Sixty miles became seventy. Her body covered all of the Equestria heartland; just one of her toes could have swallowed up a small-sized city. But she wasn’t about to stop there.

She was enormous, some part of her mind foggily thought. Far larger than she’d ever been. Even in the old days, she’d never dreamed of getting this big.

Why hadn’t she? This feeling was like nothing else she’d ever experienced. Celestia smiled to herself, her fingers tracing small circles around the outside of her breasts. She began to rub her thighs together, her thigh gap vanishing completely as her country-covering hips widened and her similarly sized butt swelled up toward the heavens.

But she wasn’t exactly country-covering. Not yet, at least. As she felt the growth beginning in her again, though, Celestia had a feeling that that was about to change.

The efforts of her subjects had long since ceased to provide any real stimulation, at least beyond her knowledge of their existence. But now she truly grew past them—past their entire world—as her growth slowed, paused, and then tripled in pace. She passed by one hundred miles, then two hundred, barely stopping for breath as her titanic body grew and grew and grew, covering most of northern Equestria as her breasts and thighs grew out to crush whole cities beneath them. Only Shining Armor’s lust-fueled shield protected them; without it, Equestria would have been ground to dust beneath Celestia’s nation-sized ass.

She was visible from space now, the very top of her horn poking up into the lower atmosphere. Something deep in her body rumbled, and she exploded with size, growing to a thousand miles in height in the blink of an eye.

Now a full million times larger than a normal pony, some part of Celestia’s mind pondered slowing down. But the power of the Sun was in full runaway mode, and it wasn’t about to stop here. Celestia groaned, holding up a hand as her body shook with the force of another orgasm. Far, far below her, she could see the island of Manehatten. It and a few cities dotted the ground, tiny beneath even one of her fingers. Her wings flared wide, sending hurricane-sized gusts of wind through the atmosphere as her lust returned with a vengeance. Her hand flexed into a claw, gripping the land around Manehatten as she rode her orgasm out to the finish line. She doubled her size again, moaning and squirming as her mane dragged across the surfaces of at least a dozen cities.

Had she been standing up, the atmosphere wouldn’t have even reached her shins. Celestia could more than see the curve of the planet now; at nearly three thousand miles in size, she felt like she could reach out to the Moon above her and grab it. In reality, it was still many times further away, but she was so big now, and the planet so small, that it felt more possible than ever before.

She groaned, sitting up, as her rear swelled outward to crush the continent beneath her. Her feet dipped into the ocean at Equestria’s western shore, the water lapping against the tops of her toes. She gently humped the mountain range lying beneath her crotch, the slight bumps barely providing enough stimulation to set her off. But that was okay. Her growth was more than doing the job.

She began to grow again, her body crushing wide swaths of the planet beneath it. She was officially longer than the planet was around, now; she could curl her body around the equator and meet her toes on the other side. The sensation of grinding her body against the Earth, rubbing it between her nearly planet-sized cleavage, was almost too much for her to bear.

Celestia shifted her weight until she was sitting once more. Her massive plot covered nearly a third of the surface of the entire planet, one enormous asscheek swallowing up whole continents as she grew past thirty thousand miles. Now heavier than the planet below, she felt her growth slowing, almost stopping.

But she wasn’t done yet—not nearly. Her vision blurred, her blood pounding in her ears as she felt the planet turning between her legs, rotating her to face the Sun. She felt the celestial body calling out to her, teasing her as she grew larger and larger to meet it.

The world fell away behind her, apparently shrinking as she grew large enough to fit it comfortably between her breasts. She floated in the void, drawing toward the Sun as she grew larger and larger to meet it.

It was huge, bigger than even she could comprehend at her current size. She could feel it teasing her through the connection they shared, encouraging her to grow, to get bigger, swallowing her up in the twin sensations of growth and lust. She felt it fall into her arms, a raging ball of white-hot fire that, somehow, merely tickled her, the contact setting off every pleasure nerve in her body. She humped it furiously, cumming again and again as she drew the Sun ever closer, the growth singing out in her planet-thick veins as she grew past, really, anything she’d ever dreamed—

—she was awash in an ocean, a sea of pleasure and growth, swelling to ever-larger sizes, her rump, her tits, her every body part throbbing and surging with glee as she got bigger and bigger—

—she was cumming again and again, planet-sized drops of femcum splattering from her clit as she felt her orgasm strike her again and again—

—and then, with a final, shuddering sigh, Celestia passed out.

When she awoke, her head was hurting. She blinked blearily. Her tongue felt like sandpaper, and her hands were raw. Otherwise, the most pleasurable feeling had invaded her body: a warm, pleasant afterglow, seeping through her veins like honey. Celestia moaned softly as her vision resolved.

“Hello, sister.” That voice sounded familiar. “Enjoy your nap?”

Celestia blinked again, groaned, and swallowed. “Luna?” she murmured. “Wh-what…”

“You passed out,” her sister provided helpfully. “I can only suppose that your combined size and pleasure overwhelmed your conscious mind.”

“Size…” Celestia frowned, trying to get her thoughts in order. The image flashed through her mind of Equestria, shrinking below her as she grew bigger and bigger, past unfathomable heights...of the Sun, steadily growing larger, and then smaller beside her… She shivered with sympathetic pleasure.

“I was...enormous,” she said, surprised at the sound of her own voice. “Luna, how big was I?”

“We don’t know.” This time, it was Twilight who was speaking. Celestia glanced over and up at her faithful student, then flushed slightly when she realized that she was still unclothed. The remnants of her dress undoubtedly lay in shreds somewhere in the wreckage of Canterlot Palace. Still, she told herself, the whole world had just seen her in the nude.

The whole world. “And—was anypony harmed?” Alarm bells suddenly went off in Celestia’s head. “Oh, goodness. I didn’t think—“

“Nopony was harmed,” Luna said calmingly. “You can thank Shining Armor for that.”

“You’re sure?” Luna nodded. Oh, thank goodness. Celestia felt her shaking hands settle. “Still,” Celestia murmured, holding her head in her hands. “Being that big...I must have been…”

“When you pushed off of the planet, we saw you right up next to the Sun,” Twilight said. “From there…” She shrugged. “Everything was kind of overwhelming after that.”

Celestia worked her tongue through her lips, trying to moisten them. “Well,” she croaked. She swallowed, then smiled. “Well,” she said again, her voice stronger and smoother, “that was certainly…an experience.”

“I’ll say.” Shining Armor peered around his sister’s shoulder and grinned lecherously. “You sure gave Equestria one heck of an eyeful!”

He yelped as Cadance swatted him. “Don’t be rude to Auntie,” she scolded. Then, with a thoughtful look on her face, she said, “Although...the next time we have one of our parties, I’ll make sure you’re invited.” She gave Shining’s rump a little squeeze, her other hand still patting her cum-bloated, sloshing tummy. “Seems like my husband has a thing for bigger mares, and more ponies—or more pony—always makes for a merrier time.”

“My thanks,” Celestia said evenly. She smirked wryly. “I’m glad you all enjoyed the show.”

She leaned back and groaned. Her muscles felt wonderfully loose; she was more than content to bask in the remnants of her afterglow. She couldn’t even remember how many times she must have orgasmed. “It’s been far too long since I allowed myself that amount of...enjoyment,” she said, raising an eyebrow at Luna. “Perhaps I should have taken your advice sooner.”

“Perhaps,” Luna said. “And it would appear that your growth has broken down other boundaries as well.” She eyed Twilight meaningfully.

Celestia smiled. It was odd, really, how she’d never really allowed herself to notice how cute her little student was. Well. Not so little anymore; once she grew into her princesshood, she’d undoubtedly tower above her brother. But in any case…

“It would seem so,” she said carefully. She met Twilight eyes and smiled, not unkindly, and made a mental note to talk to her privately later.

Celestia cleared her throat. “I must apologize, though, for my actions. I really did make quite a sight of myself.” She looked a bit abashed. “I do hope our subjects don’t mind.”

“Mind?” Cadance snorted. “They certainly don’t.”

“Oh?”

Luna beamed. “In fact, they were more than happy to aid you in your pleasure. It would seem that Equestria is still as eager to see you grow as you are to do so.” She waggled her eyebrows suggestively. “I’ll wager that more than one stallion has discovered a liking for tall mares because of you.”

“Really,” Celestia said.

“Really,” Luna echoed. A smile twitched at the corner of her mouth. “I daresay quite a few of your subjects will be more than happy to help you reach such heights again in the future. From what I’ve heard, everypony loved seeing you that big—in more ways than one.” She winked. “I daresay we’ll see a notable uptick in fertility rates for a few weeks after this.”

“Oh, dear,” Celestia said. Then she sighed and folded her hands in her lap. “Well, in any case, that’s a relief.” She looked thoughtful. “Though I do wonder why I began growing in the first place.”

“I thought it was odd,” Twilight said. “That you would just start, erm—“ she blushed “—masturbating in the middle of the court.”

“Indeed,” Luna said. “Perhaps a reaction to some kind of food?”

“I had some...chocolates, I think.” Celestia’s nose wrinkled. “From a suitor, I think.”

Luna gave a long, deep belly laugh. “Aha! So there’s our answer. Some poor stallion thought to gain the princess’ favor through her marehood...and wound up with a giantess on his hands instead!”

Celestia laughed as well. “I’m sure he didn’t get what he expected. I wonder if he’s well?”

“I’m sure he is,” Luna said. “You have Prince Armor and Cadance to thank for that.”

“Still,” Celestia said, inclining her head in their direction, “I can’t help but wonder…”

Somewhere in the wreckage of Canterlot Palace, a stallion stirred.

With a pop and a flash of green flame, he disappeared, leaving someone else behind. Groaning, her every bone aching, Queen Chrysalis of the Changelings stared down at her dripping body with some mixture of shock, disgust, and raw fear.

Then she remembered the gigantic princess she’d seen above her earlier and nearly fainted for the fourth time that hour.

What had she been thinking? It was clear that Equestria was no place for any self-respecting changeling. She was power-mad, not suicidal. She’d been made a fool of. The mere fact that that prissy little princess had been able to grow to such ludicrous sizes, but had allowed herself to be “defeated” the last time the changelings had invaded…

Chrysalis’s hands shook as she cleared her wings of the remnants of Celestia’s hot, sticky marecum. As far as she was concerned, Equestria was off-limits. Out of bounds. Against something like that, what could even she do?

She took off into the air, slightly unsteadily, and tried to make her way through the city’s airspace as quietly and as quickly as possible. Maybe the changelings could invade another, safer country to gain the love they needed. Yes. That was it.

Perhaps Gryffonia. Or the Dragon Empire. Much, much safer choices.

Whatever the case, Chrysalis told herself, she could not conquer Equestria. A shiver went up her spine, and she angled for the Badlands.

The instant she got home, she headed straight for her Breeding Room and had her drones rail her for hours, crying out in pleasure each time a shaft penetrated her, and privately imagining them to be the snow-white fingers of a massive pony monarch.

As she lay in her twelve-foot bed, drone seed slowly dripping from her cunt, Chrysalis silently wondered whether Equestria might be interested in a diplomatic marriage. She shivered as she remembered the feeling of being used in that way again. It was so disgusting, so peasant-like, so beneath her...and yet so incredibly hot.

No invasions necessary, she told herself. Just a ring, a wedding, and a mare larger than her wildest dreams. A smile on her face, and a full-sized pillow clutched to her chest, Queen Chrysalis slowly drifted off to sleep.