Pinkie looked down at the little scroll with a funny sort of smile on her face. “So Twilight said that this spell could make all my baked goods bigger and sweeter.” She looked back over her shoulder at Gummy, who was sitting on her bed. “What do you think, Gummy?”

Gummy didn’t give any overt response, which Pinkie accepted as perfectly natural. He did, however, roll over and plop down onto Pinkie’s tail, which he immediately seized hold of between his jaws. This, Pinkie interpreted as clearly sage advice.

“That’s what I thought.” Pinkie spread open the scroll and squinted at it. “Huh,” she said. “I wonder how you’re supposed to pronounce this word?”

Gummy watched idly, his jaw twitching every so often, as Pinkie hopped over to her dresser and retrieved a cupcake from behind it. “For cupcake emergency,” she’d told Fluttershy the last time she’d come over. If having a super-duper spell to test and no cupcake to test it on was an emergency, then this definitely was an emergency.

“So,” Pinkie said. She plopped down onto her flank and leaned back against the bed, cradling the scroll between her hooves. She’d set the cupcake on the floor between her hind legs, where it sat waiting for its time to come. For his part, Gummy was perfectly content to remain latched to Pinkie’s tail. “Twilight said that this spell can make something much bigger, and much much more delicious.” She clapped her hooves together and squealed. “Oh, I’m just going to make the perfect dessert with this! It’ll be a giant chocolate cake as big as Big Mac - no, as big as Sugarcube Corner! And it’ll be sooooo tasty that everypony will want to eat it!”

Gummy appeared to listen patiently as Pinkie began to read the spell Twilight had left. Meanwhile, the cupcake sat on the floor without saying a word, as cupcakes are wont to do.  If Pinkie had tried to interpret its emotions, though, she would have described them as “excited, anxious, and a little bit sugary.”

Pinkie read the last word of the spell - and immediately stared down at the cupcake. The cupcake, if only it had had eyes, would have stared right back. Instead, it sufficed to merely sit upon the floor as though it had not been the target of a spell of great magical power.

It was buttercream. It was a light pink color, with a smooth little curl in the frosting near the top. And it was still the exact same size that it had been a minute ago.

“Oh, marshmallows.” Pinkie snapped her hoof. “I guess that spell doesn’t work after all. Gummy, do you - “

She stopped midsentence, suddenly losing her train of thought. All ideas of cupcakes and spells went out of her mind in the blink of an eye, to be replaced by an intense burning directly between her legs. It wasn’t an uncomfortable burning, though, at least insofar as an incredible sense of need was separate from “discomfort.” All Pinkie knew was that the fairy cake between her legs was in dire need of some...attention.

“Ooh.” She shivered with immediate satisfaction as her hoof made contact with her labia, her poofy lips aching with a desire to be touched. It’d been a while since Pinkie had stirred up her honey pot, being as busy with fun and parties and desserts as she tended to be, but in this moment, alone in her room, she suddenly found that it was all she could think of. “Mm.”

Usually, it took her at least a few minutes to finish off, but it had barely been thirty seconds of rubbing, teasing, and stroking herself before Pinkie felt a shock of pleasure tingling down her spine. She gave out a soft whimper of pleasure as her marehood squirted all over the carpet. Some of her juices even ended up on the cupcake, running down the frosting. To Gummy, that cupcake suddenly looked sweeter than the most delectable of sugar cookies - but not, evidently, sweeter than Pinkie’s tail, which he clung to with a vengeance.

Pinkie barely had time to recover from her orgasm before she felt a soft warmth suffusing her body. “Ooh, Gummy,” she said, panting as she bit her lip, her hoof still making small circles around her marehood. “This feels so good.”

With her eyes closed, Pinkie wasn’t able to easily tell what happened next. What an unbiased observer would have noted, though, was that one minute Pinkie was sitting on the floor beside her bed, and the next -

Well, she was still sitting beside the bed, but while before her head had been a few inches below the headboard, she was now just barely even with it. That same observer would’ve been able to see her head inching up for a few more seconds, the rest of her body slowly lengthening as well until the top of her mane sat a good four inches above the mattress.

“Wowies! That felt good,” Pinkie said, opening her eyes and letting a smile spread across her face. “But maybe I should go see if Mrs. Cake needs any help downstairs.” She took a second to wipe her hoof on the carpet - she’d clean it later, she promised herself, or else just find a new one - and started to make her way toward the bathroom to wash up.

Or she would have, had she not tripped over her suddenly longer legs on route. Pinkie let out a grunt as she tumbled head over hooves to the ground, landing with her back on the floor, her hind legs in the air - and her left hoof over her nethers.

“I should - mm - really - mm go help out the Cakes,” she said. The volume of her voice decreased with each word, her hoof starting to massage her sweet mound by pure reflex alone. “Or I could - mm - just stay here - mm a little...longer.” Her back arched as a smaller, yet no less pleasurable orgasm surged through her. Normally, she would have questioned the speed and ease with which these were coming, but that part of her mind was clouded over with pleasure and a desire for more.

“Ooh, yes,” she panted, her body twisting and turning as she grew a few inches taller. By now, she would have been as tall as Big Mac - another few seconds of her hoof madly rubbing against her clit, and she’d be able to look down at him.

Meanwhile, her tail - and Gummy by extension - had been trapped beneath her flank when she’d tumbled to the floor. For his part, Gummy didn’t seem to mind all that much, though any pony in the same position might have panicked as Pinkie’s already large flank began to inch across the floor, growing from a wide, bountiful rear to a Princess-sized ass in a matter of seconds.

And that wasn’t the only thing Princess-sized in the room. Pinkie licked her lips and adjusted her thighs. Her hoof was now planted between her legs as firmly as though it’d been stuck there by extra-sticky taffy - and, from a certain point of view, the juices still squirting from her pink pussy may have been just as sweet.

Somewhere along the way, Pinkie realized that she’d made it onto her bed. She had her pillow between her legs, and was humping it as hard as she could - her hoof still rubbing her clit so hard and so fast that any other pony would have been raw with exertion. But Pinkie felt nothing but pleasure, sweeping through her system and driving her eyes back up in her head as she stretched and groaned and twisted.

Her legs, which were still jittering from the aftereffects of her last orgasm - by now, she’d lost count of every time her candy volcano had gone off - now stretched far enough to droop off the sides of the bed. Had she been standing up, Pinkie would’ve been able to easily look down on Celestia herself.

Celestia stood six feet tall and just barely had a foot of clearance through most pony-sized doors. Had Pinkie tried to leave her room and head back downstairs, she would have had to duck to get through, and even then it would’ve been a tough sell to fit her wide, growing shoulders through the tiny-sized doorway. But she had no intention of stopping, and neither did her growth.

She moaned again, her louder voice echoing through the room. Now, her hooves easily touched the ground beneath her bed, and her own head was rapidly outgrowing the headboard behind her. She thrust her hips up into the air and banged them back down, her tongue hanging out of her mouth as she panted. The bed shuttered, rocking back and forth and groaning with each errant twitch of Pinkie’s oversized body.

She could imagine a stallion in the bed with her - a much smaller one, some part of her noted with lustful glee - his tiny cock being rapidly outpaced by the growing pink pony as she rode him like an avalanche.

Pinkie shuddered with pleasure as the next orgasm swept through her, her marecum spilling out over the bed. And this time, the bed shattered beneath her.

She moaned happily. “Oh, Gummy,” she said, Gummy himself stuck somewhere beneath her massive flank. “You have no clue how absolutely amazing this feels!”

Her hoof didn’t budge from her clit, which was now dripping in greater volume than ever before. Pinkie kept panting, kept rubbing as fast as she could, her entire body seeming to vibrate as it finished expanding.

Her body arched back again, and she let out a second cry. The floor beneath her growing flank creaked loudly as her head shot up toward the ceiling, her growing nethers exploding with marecum and her wide-spread legs stretching toward the sides of the room.

“So…good,” Pinkie said, panting.

“Pinkie!” The door slammed open, and Twilight Sparkle burst in through the door. Her eyes

opened wide, and she backed up a few paces from the enormous pink pony. “I thought you’d taken that spell!”

“Mmff.” Pinkie’s eyes closed, and she bit her lip. “Mm…Twilight. I’m so…big…”

“Yes,” Twilight said. She took off from the floor and hovered next to Pinkie’s enormous face, her wings flapping slowly. “And that’s a problem! We need to get you back down to normal before you crush the bakery!”

Pinkie shuddered, her entire body shooting up a few inches. “Oh…but I’d love to be so big.

Big enough to spread my fun all over Equestria. Mmff….” Her hoof kept rubbing her clit, and she began to hump the empty air.

“Pinkie, I need you to stop. I need you to - “

With a third and final cry, Pinkie came once again. Marecum splattered out all over the walls and ceiling, juices leaking and dripping over everything in sight - including Twilight, who stopped midword.

A single drop fell into Twilight’s open mouth, and her entire body shuddered.

When Pinkie came to, the sun was shining down on her, and the crushed remains of Sugar Cube Corner lay shattered beneath her block-sized flank. She heard a slurping from far below. When she looked down, she saw Twilight herself, eating out Pinkie’s preposterously-sized pussy as fast as she can. From what Pinkie could see, Twilight’s stomach had even started to sag from the amount of marecum she’d devoured - and Pinkie still felt ready for another go.

“Oh, yes, Twilight,” she moaned, envisioning herself growing to overshadow all of Equestria. “Just…like…that.”

Pinkie kept growing, her orgasms coming one after another, seemingly never-ending. By the looks of it, her growth was going the same way. She was already nearing forty feet tall sitting down - probably fifty feet tall standing. As it was, Twilight - an alicorn - was barely a tenth of Pinkie’s size, and would’ve just barely reached above her hoof. Of course, Twilight had better things to do, like licking up the juices around Pinkie’s winking, growing pussy as fast as she could. Already, Pinkie’s labia was nearing the size of a normal pony, and as she surged up a few more feet, it looked fit to only get bigger.

“Whoa, whoa!”

Pinkie took a second from her growth-induced haze to recognize Dashie’s voice in her ear. “Dashie!” she cheered - though more like shouted, if the way that Rainbow winced at the word was any indication. “You should join us!”

“Join in - “ Dash glanced down, seeming to notice Twilight for the first time. “Uh, Pink? I’m usually down to munch some carpet with the best of ‘em, but, uh, there’re bigger things to talk about right now.”

“Like me!”

“Yeah,” Dash said. “Like you.”

“Oh, but you’ll love it so much!”

“I - whoa! Pinkie! I - “

Dash’s shouts were quickly muffled when Pinkie swept her out of the air with one carriage-sized hoof. Her professed carpet-munching soon became a reality when Pinkie shoved her - not harshly, but certainly enthusiastically - right into the folds of her pussy. Dash thrashed and sputtered, but by the time she got a single drip of Pinkie’s juices on her tongue, it was too late.

Pinkie slowly removed her hoof and rested it on her thighs. She let out a sigh as her growth slowed to a halt, leaving her at an extremely respectable fifty-five feet tall. Already, ponies were gathering around her, watching the wreckage of Sugarcube Corner with equal amounts of horror, disgust, and arousal. One, a cream-colored mare with a delicious-looking mane, had already joined the other two in lapping at Pinkie’s folds.

Pinkie let out a squeal of delight as she came again. Her hooves thumped on the ground, leaving deep imprints in the soil that easily went five feet deep each. Each pony around her backed away, some going so far as to turn and try to run away.

Keyword: Tried. Pinkie spotted the fleeing ponies quickly enough and, with a hoof that could easily reach anywhere in the town square, scooped them up and plopped them in between her legs. She took great pleasure in rubbing their tiny bodies against her pussy, shivering with glee as she felt one or two of them slip inside. The way they thrashed against her clit only served to turn her on more, which only made her even bigger.

When Pinkie finally stood up, just a simple errant twitch of her tail was enough to sweep away half of downtown Ponyville. Her head stretched up high above even the tallest buildings in town, but she knew it wasn’t big enough.

She eyed Canterlot Mountain off in the distance and grinned goofily. She might’ve made almost everyone in Ponyville happy, but Canterlot had even more ponies she could share her sweet, sweet candy with. And maybe they’d make her even bigger - big enough to spread her sweetness across all of Equestria. 

She started to make her way out of town. At first, she made something of an effort to avoid stepping on any buildings, but once she shaved off the fronts of two separate stores on either side of the street with a single hoof-fall, she quickly gave up. By now, she’d hit three hundred feet even, and a single one of her hooves was big enough to smash an entire block to pieces. As she pranced out of the city, humming to herself - and occasionally shivering in pleasure as another growth spurt hit - a small legion of townsponies followed her, some splitting off to lick or bathe in the small ponds of femcum she left behind, still more joining the crowd to follow her as she grew to overshadow the entirety of the town.

Thud. Thud. Each hoof-fall was like an earthquake, an every time she lifted a limb into the air, she left a forty-foot crater behind deeper than the Ponyville municipal pool. A small army of pegasi hovered around her, half of them drifting by her muzzle and giggling whenever an errant breath of air sent them tumbling in all directions. The rest of them, taking full advantage of their ability to fly, did their best to keep up with the growing Pie as they licked, humped, and swam through her enormous sex.

Admittedly, the bigger Pinkie got, the more difficult keeping up became. The length of her steps had already reached seventy feet each, and though she was mostly meandering across the countryside, it was becoming increasingly hard for the population of Ponyville could keep up.

She towered above the countryside. She made the ponies around her look like ants, made the trees look like matchsticks. She was a titan striding among insects, and with each shudder of pleasure that coursed through her body - she didn’t even need to stimulate herself anymore; the sensation of growth itself was stimulation enough - she surged up another dozen feet.

By the time she reached Canterlot, she’d long since left her army of addicted followers behind. By now, she was big enough to look down on the city, even with her hooves still on the ground. Five hundred feet had become a memory a scarce five minutes ago. One thousand feet was the new normal, and she looked to be fast outpacing that.

Pinkie Pie smiled down at the citizenry of Canterlot, her enormous face casting a shadow over the entire downtown. “Hello, everypony!” she boomed. “Pinkie Pie here! And I’m here to make sure you all…”

She trailed off, her attention quickly darting to something else entirely. Just as the city lost her eye, something else caught it entirely…

The mountain it was settled on.

Pinkie licked her lips, eyeing the peak appraisingly. It was a long way up yet (as if “long way” held any meaning to her any more; her head reached over halfway up the mountain, and she was still growing), but she suddenly wanted it bad enough that distance didn’t matter.

As if reacting to her desire, her body surged upward. Canterlot Mountain wasn’t a large formation, really, and as Pinkie’s already massive body hit two thousand - no, three thousand feet - it started to look less like a mountain and more like a moderately-sized pile of dirt.

Pinkie’s massive hooves hit the side with the sound of a thunderclap, starting at least five separate avalanches all around the peak. She lifted herself up and scrambled to position her hooves in place as she positioned herself directly above Canterlot Peak. Then -

Her first moans sent the ground rumbling around her for miles; her thrusts actually caused an earthquake somewhere around Fillydelphia. Pinkie moaned and groaned and thrashed, pleasure overriding her every sense. She was fucking a mountain (or maybe the mountain was fucking her; she didn’t really care enough to tell the difference). Her head soared up into the sky as she passed four thousand feet. Four thousand, five hundred. Five thousand - \

Her orgasm hit her just as she took the whole of Canterlot Mountain inside of her. She’d grown large enough that the entire mountain was barely the size of a large dildo to her. Her hips hit the base, her eyes rolling as she took the entire thing inside of her - ponies in Canterlot below (or inside; whichever worked best) either screaming in terror or moaning as they lapped at the juices all around them. The Sun had been blotted out of the sky by a preposterously powerful pink pussy, and an increasingly large number of ponies were okay with this.

Pinkie squealed as she reached a mile in height and sped past it, more than doubling her size in under ten seconds as her orgasm washed through her like a literal tsunami. The tuft of her mane was just beginning to wisp through the lowest clouds, and she didn’t show any signs of stopping.

Finally, the lhe last waves of pleasure swept through her veins. Pinkie collapsed onto the countryside behind her, leaving Canterlot Mountain drenched in her sweet and sticky syrup. She was big enough now that it would have been hard to believe that the mountain had ever been big enough to serve as her dildo, let alone fill her up.

Pinkie panted happily, her hoof already drifting back down to her pussy. That had felt good. Better than anything she’d ever felt. But Equestria needed a Pinkie Pie big enough to spread sweet sauce all across the land…

...and to do that, she’d have to get even bigger still.