Rising To the Challenge

Even after all these years, it never ceased to amaze Twilight how quickly her life could be thrown for a loop. Not ten minutes ago, she had happily stood in her basement, engaging in two of her favorite past times: scientific experimentation, and spending time with her best friends. She, Rarity, and Spike had all been smiling, trading little jokes, and just... enjoying the moment.

The moment, however, had passed.

Now, Twilight stood in the streets of Ponyville, covered in dust and earth, staring at the remains of her home. The Golden Oaks Library, that humble tree that had been her home for so many years, had been destroyed. However, it was not reduced to rubble, but instead lay on its side, roots ripped from the ground as if some mighty beast had emerged from underneath it. Which was exactly what happened.

Princess Celestia had asked Twilight to examine a strange magical artifact Daring Do had uncovered deep in the Himallama mountains, and of course she said yes. The chance to discover the secrets of a long forgotten relic? Celestia couldn’t have dragged her away! After a few days of cross-referencing and research, she deduced that the artifact was created by the legendary Herdians, a tribe that up to that point had been thought to be mere myth. The Herdians were said to be mighty warriors, whose battle prowess and sheer size made even the fiercest opponents flee.

After deciphering several of the runes carved into it, Twilight had come to the conclusion that the small, box-shaped artifact was how the Herdians achieved their legendary size, said to average around nine feet tall and packed with muscle. She ran a few preliminary tests and figured that by inputting a certain frequency of thaumatic radiation, she could activate it, and induce actual physical growth. Deeming it safe enough—or perhaps out of unchecked scientific zeal—she made the decision to test it on a live subject. The question then became who to test it on. She couldn’t test it on herself, as she had to carefully monitor the thaumatic energy flow, and Spike emphatically refused, having had enough experience with magical growth spurts.

Which was why she called on Rarity. Twilight had once overheard the mare saying she sometimes wished to be taller than her dainty five-foot-two. When she arrived in Twilight’s basement and heard what the goal of the experiment was, she had been a bit hesitant. She loved Twilight dearly, but knew how a not insignificant number of her experiments ended. Still, the prospect of adding a few inches to herself—and perhaps a bit of muscle and an enhanced bust, though Twilight couldn’t be sure—compelled her to agree. And after a few pulses of magic, Rarity did indeed grow two and a half inches taller, much to her delight. She then asked Twilight if they could add just a bit more, so she could at least see eye-to-eye with Rainbow Dash. Seeing no real problem with it, Twilight had agreed and reactivated the artifact.

And then it wouldn’t deactivate.

A loud moan of pleasure shook Twilight out of her own mind and back to the real problem at hand. Standing on the other side of the road was Rarity, nude as the day she was born and shamelessly pleasuring herself, tweaking the nipple on one of her titanic breasts, while her other hand gave languid strokes up and down her mammoth shaft, aided by the seemingly endless stream of pre-cum flowing from its tip. This would have been odd enough by itself. The continuous and massive influx of magic from the artifact caused some sort of reaction that Twilight could hardly believe. Rarity's breasts had swelled to at least three times the size of her head, and that was when she was normal sized! And most bizarrely, she had also grown a cock so large that it would put even the most endowed stallion to absolute shame, the fat head peeking just above her ample cleavage. Her balls were no slackers either. Her full, churning sack was easily wider than her waist and hung to just above her knees, her legs splayed lewdly to allow them room to grow, as they seemed to be doing. Of course, the other reaction was much more pertinent, that being that instead of a few inches, Rarity had grown a few feet taller. And that had only been the beginning. Now, she towered over even several of the surrounding buildings. Twilight estimated her friend to be somewhere around twenty feet tall.

The sad fact was that wasn’t even the most worrying part of the situation. The feedback loop that had formed between Rarity and that damned artifact had not only accelerated her impossible growth, but had also drained the magic from it and into her. Twilight could feel, and was almost afraid of, the amount of magic coming from her huge body. A tiny ache ran through her horn as a look of focus came across Rarity’s face, and with several feminine yet still powerful moans, her head began to slowly creep higher. A sound not unlike a rope creaking and stretching echoed across the street as she packed on several feet of height, all of her goddess-like proportions matching her growth.

After reaching about twenty-five feet in height, Rarity finally opened her eyes and took in the site before her. The epic orgasm she had when she broke through the ground had coated the surrounding area with a layer of creamy spunk, achieving a look of snowfall on the road. It had also attracted a crowd. The destruction of the Princess’ home, not to mention the giant, leaking dickmare standing next to it, led a few dozen ponies to stand on the sides of the road and gawk. Some looked horrified, others merely shocked and confused, and some were openly ogling her godly form with lecherous stares. A few were quite obviously rubbing themselves through their clothes.

This apparently had an effect on Rarity. She shivered, her titanic tits jiggling. She grabbed both of her nipples and squeezed her breasts tight against her throbbing cock, and with a loud moan, thrust upwards. A spurt of pre-cum worth at least a few gallons arced through the air, splattering lewdly on five onlookers. Three groaned and gagged, while the other two moaned and licked up the thick fluid, their hands shoved down their pants to rub at their privates. As Rarity settled, she gazed at her audience and smirked. “Mmm, that’s right Ponyville. Gaze upon your goddess. Gaze upon true power.” Her form lurched upwards several feet, her impossible figure growing with her.

And then there was that. Rarity hadn’t turned into magic drunk sex maniac in an instant. Twilight and Spike had frantically worked for nearly ten minutes to shut off the artifact, or at least sever Rarity’s connection with it. Well, Twilight had. Spike was helping at first, but as her body became more “enhanced,” he quickly became... distracted. While Rarity’s growth had started slow, gaining momentum like a freight train, for some reason her ego, which was a bit insufferable at the best of times, had almost instantly kicked into overdrive. Twilight and Spike had to yell to hear each other over not only the sound of the quickly accelerating magic, the lewd sounds of Rarity’s body stretching and inflating and her accompanying moans as she played with her new equipment, but also her constant boasting.

What began as sultry teasing eventually morphed into cruel insults. She just kept moaning not only about how sexy she was, but how un-sexy they were. And it seemed that the bigger her sexually charged body got, the bigger her ego became. And now, her eyes scanned across the ponies she had known her whole life with barely restrained contempt. “Truly, nopony could possibly compare to me now.” She then turned her immense body towards Twilight. “Not an alicorn,” she said, leaning down, far down to bring her eye level with Twilight, but turned her gaze to something behind her. “Hmm, and not even a mighty dragon.”

Twilight blinked, then spun around. The last time Twilight had paid Spike any mind was back in the basement, where he had been doing what several ponies in the street were doing: gawking at Rarity’s growing body and brazenly pleasuring himself through his jeans. Now however, the six-foot-three, decently muscled nineteen year old dragon was looking up at the giant before him with an odd look that Twilight couldn’t place. “R... Rarity?” he more asked than said.

“And to think,” she said with a condescending grin, “up until this very morning, I thought that you had grown up into a strong, handsome young drake.” She brought one of her beefy arms to her face and sighed. “But now we know the truth don’t we?"

"Rarity?" He began to tremble just a bit. "W... nrgh, w-why are you—"

"You’re just like everypony else. Small. Frail.” She groaned and flexed her bicep, the muscle easily half again as tall as Spike. “Weak.”

As Twilight watched his body tense as if struck, she shouted, “Hey! That was uncalled for, Rarity!”

“Oh, but it was very called for, darling,” Rarity said as she stood back to her full height, now probably around thirty feet. “Besides, what could you actually do to stop me? I am far and away the strongest being in Equestria.” She looked across the street and smiled at one of the ponies watching the scene unfold. Big Macintosh had likely been on his way to the market, as he was currently hitched to a huge cart of apples. He stared at the approaching Rarity with what looked to be a mix of confusion and fear. He nearly lost his balance when her gigantic foot landed next to him. “Hello, Big Mac,” she said, looking down at the shaking stallion. “Well, not really ‘Big’ anymore.”

Mac let out a terrified yell as Rarity reached down and grabbed the large cart with one humongous hand, lifting it and himself into the air. The cart had been laden enough that even his famously formidable strength had struggled to pull it, yet she hefted it as if it was a single apple. It was almost even with Rarity’s thick nipples when Mac finally came loose from the harness, falling towards the ground with a shriek only to be caught by Twilight’s purple magic. Rarity had apparently not noticed, or simply didn’t care, as she brought the cart to her mouth. She poured the contents, at least five barrels worth of apples, into her mouth and swallowed without even chewing. Letting out a satisfied sigh, she crushed the cart to splinters, lazily tossing the remains behind her.

“You see, Princess?” she sneered. “I see it clear as day, as do all these little ponies drinking in my perfect body. I am the strongest and—mmmmmmmmyyyesssssss.” Her aura flared again, and she ascended yet higher into the sky, both hands stroking up and down her prodigiously leaking cock. “And the biiiiiiiiiiggesssst creature to ever walk this earth. And the only, oooooohhhh, place to go from here is bigger, and biggggger, and... oh yesyesyesyesss biiiigger!”

As Rarity continued growing and pleasuring herself, a searing ache lanced through Twilight’s horn, causing her to wobble on her feet and grasp her head, letting out a low groan. “What... what was that?” she wondered aloud. She of course knew what it meant: something nearby was throwing out massive amounts of thaumatic radiation. But what could it be? The artifact lay inert beneath the remains of her home, and while Rarity’s enormous body was emitting an awful lot of magic, whatever had shocked her eclipsed even that. She began to look around, trying to figure out what could outshine the impossible development before her, when she heard a groan behind her. She whirled around, and gasped. “Spike!”

Spike was no longer standing and staring at Rarity with that puzzling gaze. Now, he lay on the grass on his knees and elbows, head tucked in towards himself. His slightly trembling, white-knuckled fists would occasionally give little pounds to the soft grass, and he was grunting as if in pain. Twilight swore she could visibly see the thick, pulsing waves of magic radiating from his body, like heat off a paved road.

Twilight was kneeling at his side in a flash. “Spike?! Spike, what happened?” He must have been injured when Rarity destroyed the library, though she could not see any blood or obvious wounds, and he had seemed fine just a moment earlier.

Another sensual groan came from behind her, accompanied by a slight tremor through the ground, signifying that Rarity must have added yet more height to herself. Twilight turned to look, and indeed, she now towered over nearly every building in town, easily forty feet tall by this point. Her mighty shaft was now sending a near-constant waterfall of musky fluid towards the ground. “Ooooh, yes. This is power only fit for a goddess such as myself.” She flexed her arm yet again, and let out a moan as the muscles tensed and strained, bunching up with the definition of a professional bodybuilder. “I truly am the strongest being in all of Equestria, if not the world!”

Beside her, Spike let out a low, angry growl, and Twilight was knocked onto her backside as the energy coming off of him surged in intensity. Twilight’s brow furrowed as she racked her brain for a possible cause. Over the years she and Spike had lived together, her knowledge of dragon biology and customs had grown considerably. A deluge of facts raced through her mind’s eye, everything she could recall about her surrogate little brother to try and—

Strongest...

Twilight gasped. She looked a bit closer at him and sure enough, the muscles of his exposed arms were pulsing ever so slightly, yet growing in intensity. “Oh, no.”

In an instant she was back at his side, a gentle hand laid across his back, letting her feel the quivering muscles being supercharged with magical energy. “Spike? Spike, listen to me,” she said calmly, yet firmly. “You have to ignore her, okay? Rarity isn’t in her right mind. Whatever adverse reaction she's having is obviously affecting her mind. She probably doesn’t even know what she’s saying!”

“Oh, but I do, darling.” The ground shook hard as Rarity covered the dozens of feet between them in two steps. The shadow of her meaty shaft hung over them like a cloud, the musky scent of her fluids becoming thick and heady. “Look at all these ponies, staring and stimulating their pitiful excuses for bodies. They could never hope to match up to me now.” She let out yet another groan, packing on a few more feet and sensually massaging her heavy tits. Twilight could hear the thick seed in her scrotum roiling and churning, producing ever more as they inflated with the rest of her. “And I’m not even done growing! In fact, I don’t think I’ll ever be done. Why should I stop until I reach the heavens? The single biggest, strongest, mmmmmmm, most powerful creature who will ever exist!”

In any other situation, Twilight would have found all of this incredibly erotic. However, as Spike let out an even more aggressive growl than before, accompanied by yet another surge in magical energy, Twilight rounded on the giantess. “You need to shut up, Rarity!” she roared. Her friend’s size be damned, Spike was on the brink of losing himself, and she remembered what happened the last time he did. She once more moved to speak directly into his ear. “Spike, it’s me. It’s Twilight, okay? You need to control yourself. You’re so strong, I know you can! She’s not a threat, this isn’t a challenge, you don’t need to—”

With a loud snarl, Spike threw his head up, razor sharp teeth barred, his eyes blazing a bright green, and his muscles just beginning to swell

“Aw, crap,” Twilight muttered before teleporting away. She reappeared across the street just in time to see Spike begin to grow. His breaths came out in deep, angry heaves as his formerly loose fitting shirt began to strain against his rapidly growing bulk. His whole body shuddered as his shoes exploded away from his clawed feet. Spike let out a feral growl as his shirt and jeans both burst. Even from this distance, Twilight saw the pulsing, writhing muscles inflating at an accelerated rate.

Spike let out what almost sounded like a growl of pleasure as his chest began to swell, hefty pectorals bulging outward as his abs popped into an incredibly defined six-pack. His thighs and calves similarly expanded, sculpting themselves into muscles that seemed carved from emerald marble.

Twilight blushed hard as his exposed cock began its own cycle of growth. Somewhere in her mind, a tiny voice was chastising her for ogling her little brother like this. She quickly silenced said voice as Spike’s shaft, which had already been a healthy size for a dragon of his age, pulsed and sort of lurched higher, the tapered head snaking up his chiseled body, ending just peeking over the stone slabs of his pecs, maybe sixteen inches or so, and thick enough that Twilight wouldn't be able to wrap her hand ar—You stop that right now, Twilight! His testicles got their own spurt as well, swelling to the size of medium oranges, his sack slowly sinking lower with their hefty weight. In a matter of seconds, Spike had gone from strong yet lacking definition to the very icon of masculine fitness. His new muscles flexed, tensing and shuddering with newfound power as he glared up at Rarity, who had been observing this with a sort of detached curiosity.

“Well,” she said dismissively, “I suppose that's a... decent showing for someone as tiny as you, but it’s not—”

The glow in Spike’s eyes intensified, and he began to grow. Every part of him seemed to just streeeetch upwards towards the sky, his wide eyes never leaving Rarity’s. There was a sound reminiscent of grinding rock as his bones shifted and reformed to allow his still bulging muscles to keep pace, flexing and relaxing a Spike soared skyward. He was also growing much faster than she had. In only a few moments, Spike had grown to around twenty-five feet tall, bringing him eye level with Rarity's navel. His impossibly strong muscles flexed even as the ridges along the underside of his swelling dick throbbed in time with his racing heart.

“Hmm, I am once again left disappointed, Spikey-Wikey,” she all but sneered. “It seems dragons truly aren’t all they’re cracked up to be, because just like all these other small beings, you, don’t, measure, up!” She punctuated each word by tapping her massive finger on top of Spike’s head.

His glowing eyes brightened even further, tiny wisps of smoke and flame dancing between his teeth, and with a deafening roar, he surged upwards. His stacked muscles kept their borderline impossible proportions, his swelling member spewing out large gouts of pre as he rocketed up towards the sky.

Rarity’s head, at first looking down on the little drake, began to tip up as he swelled in size. It had only been fifteen seconds, maybe, and she was now craning her head back to meet his gaze. If she was around forty feet tall, he was easily fifty-five, the tip of her horn just meeting the bottom of his chiseled pecs. His eyes maintained the defiant, aggressive look the entire time.

“Huh.”

Spike’s expansive wings unfurled, casting an emerald tint across several blocks as the sunlight penetrated the veiny membrane. With a roar that rattled every window in Ponyville, Spike lunged forward and wrapped the still stunned Rarity in a tight bear hug. His wings gave a single mighty flap, and the pair launched into the air in the direction of White Tail Woods. The act sent everypony in the street, along with everything not nailed down, tumbling to the ground from the hurricane force backwash.

When the dust storm finally settled, Twilight sat back up with a groan. She cast her eyes in the direction the gigantic pair had gone, and blew a sharp breath upwards to dislodge her ruined mane from her eyes. “How is this my life?”

Rarity was aware of the sensation of soaring through the air, though she could not see anything as her face was buried into Spike’s rock-hard chest. She did feel him give two, no three more flaps before they hit the ground with enormous force. A dozen smaller trees were instantly crushed under their epic weight, the earth beneath her a spider web of cracks. She made to move, only to find she couldn’t. He had pinned her wrists to the ground above her head, and his ginormous body was straddling her. She struggled, but even her enhanced body was no match for the larger dragon. When Rarity finally opened her eyes, she was met by Spike’s powerful gaze. The glow was still present but slightly dimmed, but what gave her pause was his upper lip pulled up into a snarl, and the low growling from his throat.

The look in his eyes was so intense and feral, like some uncaged beast. For just a moment, she felt a twinge of fear... until she felt something very hard and extremely warm lightly grinding against her still engorged shaft, sending shivers of pleasure through her body. Glancing down, his cock, which was easily several yards long by this point, was laying atop her—comparatively—smaller one, buried in her bust. She looked back up and arched an eyebrow as his gaze began to shift from her face, to her incredible pillows of titflesh, and the large leaking head of her shaft nestled between them. The corner of her mouth lifted just a hair. “Oh.”

Without any warning, Spike dove down and locked her into a passionate kiss. She struggled for the barest moment, until she felt his left claw leave her wrist and land upon her tit, squeezing at the supple flesh. She moaned and melted into the kiss, letting her broad, powerful tongue wrestle with his longer, more nimble one. Her free arm reached up and rubbed up and down his back, feeling the large muscles beneath his scales tense and relax with such power. This earned a pleased rumble from Spike, who started to grind his blood-red shaft against her ebony one even as she reciprocated. The space between them was quickly flooded with pre from both of them, a musky, sticky mess that acted as lube for their wanton humping. In a matter of minutes, the two behemoths lay in a small lake of their own fluids.

Finally, Spike’s other hand released hers. He snaked it between them, roughly grabbing her cock. Even with his huge hands, he couldn’t reach all the way around it. Still, he gave it forceful, yet careful strokes, working his way up from the middle towards the top, where he worked his messy hand over and across the flat head. It had the intended effect as Rarity moaned loudly into his mouth as her now freed right hand went to the back of his head, forcing him deeper into the kiss. The hand on her breast was squeezing and kneading the firm yet soft flesh beneath it, occasionally moving to tweak her massive nipple.

Through their grinding, she could physically feel his bulging sack bubbling and stretching, producing ever more potent, fertile seed as her own did the same, forcing her legs further apart. Having not had a proper release in nearly fifteen minutes, her balls were almost painfully full, twice as big as they had been, throbbing with a desire to empty their contents. In fact, through the haze of lust, she became aware that he was growing, though much slower than before, maybe a few feet every thirty seconds or so. And she was subconsciously following suit. She shivered as that familiar heat ran through her. By now, Spike had to be nearly sixty-five feet tall, which meant she was probably around fifty. His expansive claw encompassed her entire breast, and his draconic shaft clearly overshadowing her own cock.

This simply wouldn’t do.

The clouds of her pleasure parted somewhat, and she remembered who she was. She was the goddess here. She was the body that all desired. And the right to be the biggest was hers and hers alone. And so, smiling into the kiss, she reached deep inside her towards that new inferno of power. More, she demanded internally, and the gentle heat in her body flared into a wildfire. The output of her overworked balls increased threefold, and she finally broke the kiss to let out a high-pitched bellow of pleasure as she was overcome with that delicious feeling of growing.

Spike blinked, feeling not only the breast in his hand swelling, but the simple amount of soft, womanly flesh beneath him increasing. She was panting, her expansive tits heaving and jiggling, her moans becoming louder and louder. She bit her lip as her entire shifting body tensed, a trembling shudder working it’s way up from her rapidly swelling balls that now would have reached the ground had she been standing. He felt her monstrous ebony shaft engorge even further, a powerful torrent of seed rocketing towards the tip. With a final scream of pleasure that shook the shrinking earth beneath her, she came.

Like the largest geyser on the planet, thick, creamy seed forced her urethra wide enough for a grown stallion to stand in and explode out. The force of the first blast slammed into Spike’s chin hard enough to hurt and move him out of the way. That initial shot lasted for at least ten seconds, spewing forth enough cum to fill a small swimming pool, before her bucking cock pulsed again and another flew out. Her cries were growing louder as with each breath and each heaving throb of her dick that sent an untold amount of spunk arcing across the countryside, her body expanded beneath him

He gazed on her orgasmic face, her undulating body still grinding against him even as she shot past him. His hand now sank into the inflating mound of tit, though her balls grew a bit slowly, the draining release countered by her growth. Rarity’s grunts of overwhelming pleasure matched the pulsing over her cock, impossibly large spurts of milky white fluid spewing forth, covering both them and the forest with heavy seed.

After nearly thirty seconds, her orgasm began to falter, but she grew on, that sound of stretching flesh and grinding bone growing louder with every second. Suddenly, she gripped him tightly and heaved her still stretching body to the side, destroying a copse of several dozen thick trees that now failed to eclipse her even while she was on her back. She rolled them both over, her now easily hundred foot frame making the giant dragon seem as but a child to her. Supported by her palms, she leered down at him. His entire body was shaded by her enormous form. Her meaty shaft which hadn't softened in the slightest even after her massive orgasm, now dangled above him, "drops" of musky fluid larger than his face coating him constantly. “Terribly sorry, Spikey-Wikey,” she said, her sultry grin becoming just a bit cruel, “but there’s only room for one living deity in Equestria. And it looks like your little body just isn’t up to the task.”

She felt his chest begin to heave, his breathing picking up as the emerald glow in his eyes flared to almost painful brilliance. The muscles beneath her tensed to what felt like the point of breaking. Inky black smoke and wisps of green fire licked out from between his huge fangs as the tension snapped and he swelled out beneath her. It happened much faster than her own expansion had, and it only seemed to pick up speed with every second. Before she even knew it was happening, his titanic body leaned forward, sending her flying to her back, causing a destructive quake to tear through the ground as she impacted hard enough to leave a crater.

She let out a groan, pushing herself up to her elbows. She peeked over her mountainous tits and gasped. Spike sat on his knees, towering over her prone body, his eyes still glowing, sculpted chest heaving, and immeasurable cock hung down at a slight angle due to its colossal weight. As a seamstress, Rarity always had a pretty accurate sense of size and distance. Even at just a glance, she sized him up to be, at the very minimum, two hundred and fifty feet tall had he been standing He would be eye level with the highest parapet in Canterlot by now. His voluminous sack, now full with so much of his own seed that it sagged on the forest floor, gave a lurch, and his throbbing cock spat out a gob of fluid that probably could have filled a swimming pool.

In her mind, Rarity put a few facts together. Her face twisted into a lustful grin. “Oh, I like where this is going...”

“It’s okay. Eeyup, everything is ooooooookay!”

The ground lurched beneath Twilight, and an orgasmic moan echoed across town, despite being over three miles away. A few hairs of her mane sprung out, and her smile grew even more manic. “No problem at all!”

The remains of the library had been shoved to the side. She had made a mental note to have an appropriately intense emotional breakdown over the loss of her home later, once this was all fixed. “And I am gonna fix it!” she announced to no one in particular. Before her, most of the contents of her theoretical magic section—the ones that hadn’t been destroyed by Rarity’s... emergence anyway—hung in a purple aura before her each open and their pages furiously turning at once. “Ooooo-ho-ho, yes, I am gonna fix this! Gonna fix-fix-fix-fixity-fix this!” She let out a tiny giggle. “Why, by the time I’m done, this will be the single most fixed thing—”

“Twiggily Wigs!”

“Gah!” Every book before her fell to the ground, one torn in two by her sudden jump. Twilight’s eyes flew back and forth across the fallen books, silently mourning her lost place in them all. With a growl, she turned to the bubbly pink mare peering over her shoulder. “Pinkie, I’m a little busy right now!”

“Why?” Pinkie said with her ever-present grin. “What’s going on?”

Twilight swore she could feel her brain physically impact her skull as her train of thought screeched to a grinding halt. Her dinner-plate sized eyes darted from the smiling Pinkie to the distant but still gigantic forms engaging in Celestia-Knows-What sticky activity. “I... but... you... really?”

Pinkie blinked, chewing on a cupcake she had pulled from wherever it was Pinkie pulled cupcakes from. “What?”

“You mean... you mean you seriously haven't noticed that one of our best friends has turned into a hundred foot tall hermaphrodite who is currently getting the living brains fucked out of her by my little brother who has gone bonkers out of an instinctual desire to be the strongest?!”

“Pfft,” Pinkie said, rolling her eyes, “I meant besides that, silly!”

Twilight stared at the smug looking mare for several long seconds, feeling her inner spirit wail in pain, before she harshly ran her hand across her face. “Is this what an aneurysm feels like?” she mumbled, turning back to the mental safety of her books.

“Oh, c-come now, Spi-haaaaaa-ike,” Rarity moaned as Spike bobbed his head up and down her thick ebony cock, his growls muffled by its ungodly girth. The two were on their knees, bodies grinding and undulating against each other, desperate for that delicious friction. His claws furiously worked up and down the lower half of her cock, occasionally sinking down to give her weighty sack a good hard squeeze. Her own hands were shamelessly groping her breasts, sinking deep into the incredibly soft flesh. She sucked in a loud breath every time his long, nimble forked tongue wrapped around her cock and sllliiiiippped upwards, collecting every drop of the intoxicating fluid gushing from her flared head.

By this point, the mightiest redwoods wouldn’t even reach over their calve muscles. They were simply bigger than belief. Their every shift in weight sent deep tremors through the surrounding countryside. The ground beneath them was a sticky mess of their combined fluids, a growing lake of pre, saliva, and sweat in which the debris and detritus from their destructive movements lazily floated. But she knew they could get bigger. They had to get bigger.

She just managed to focus enough to once more draw upon the inner fire and surge in height yet again, all but screaming in ecstasy, her body easily nearing five-hundred feet by this point. She heard his mighty jaw groan and creak, struggling to contain her rapidly swelling shaft now visibly forcing its way down his throat. His clawed fingers were spread out as the pillar of flesh expanded. Finally unable to take any more, he whipped his head back, taking a gasping breath and looking up at her. His eyes were just a hair beneath the level of her swollen nipples.

Rarity gave him the same smug grin she had been giving him over the past several minutes, a clear air of challenge in her eyes. “I thought dragons were supposed to be big and strong.” She punctuated those words by flexing her cock, bapping it against his cheek, smearing him with pre. “And here you are, outclassed by a mere pony. How sad.” She grinned wider as her words and size had the desired effect, just like every other time. His body shuddered and flexed, the sound of grinding rock getting louder as he began to grow. Rarity moaned and gave her nipples a delicious pinch as he quickly overtook her by a good fifty feet. Mmmmm, yesssss.

The tip of Spike's tapered dick swayed right in front of her face, spurts of fluid coming out at irregular intervals. By this point, it was so engorged with blood that it was almost purple and twitching with his heartbeat. She licked her lips and leaned forward, having to essentially hug it, for it was far too thick for her hands. She flashed him a sensual gaze as her broad tongue gave a slow lick from the mid-section to the head, flicking over and between the ridges on the underside. She felt him nearly lose his balance and waver on his knees as he let out a surprisingly high-pitched growl.

By the time he steadied himself, Rarity had reached the drooling tip. She let her tongue circle and dance around it, letting that delicious liquid collect in her mouth, gulping as much down as she could, but even then hundreds of gallons were spilling to the ground so very far below. She pulled back just a tad so she could take it into her mouth properly, but before she could make her move, a claw big enough to grasp the entirety of her head firmly took her by the mane. Her own cock gave a lurch, and she put up no resistance as he forced her head down onto his length. The primal taste of him was almost as intoxicating as her constant growth, an animal-like musk tinged with an almost spicy flavor that sent a heavy throb through her heavy sack. She freely let him fuck her face, moaning at the feeling of being used in such a way. Rarity reached down to give several firm slaps to his bulging nuts, which just made him thrust harder. Despite the feverish pace, she made sure to lavish her tongue across his shaft, licking up every single multi-gallon drop of pre.

Far too soon for her liking, she felt that telltale shudder build up in his body, his muscles tensing, cock throbbing, growls growing more and more feral. His balls audibly groaned, but before his cock could swell enough to lock her mouth upon it, she yanked her head back and frantically pumped the shaft, her hands not able to reach around it as they blurred across it. "Oh, is Spikey-Wikey going to cum? Does he think he can hope to match the volume of my orgasm? I doubt it." Her eyes grew hungry as his mounting growls grew in intensity at her words. She saw the river of cum rocketing up his shaft and leaned back just as he gave a literal earth shaking roar.

The thick spunk spewed out from his shaft with all the force of Neighagra Falls. It lanced upward through the air, jetting so high in the sky, and yet by the time it splattered down on them and the hapless countryside, the same shot was still going. Each "drop" of cum held enough to fill an Olympic sized swimming pool. Even as he came, Spike’s body once more shuddered and flexed as he began to grow yet again. Not to be outdone, she let the fire run rampant through her body, moaning nearly as loud as his roar as she followed him skyward.

His bucking cock just kept firing off more and more cum even as it swelled and stretched, fluid raining down on them. By now, White Tail Woods most certainly lived up to the “White” part of its name. The forest stretched for nearly thirty miles, yet a healthy portion of it was caked in a heavy layer of rich, thick cum. And in the center, a swath of land nearly a quarter the size of Ponyville lay crushed, destroyed by the two living giants who just kept growing and growing, neither wanting to ever stop. To keep getting bigger, as big as their pleasure would allow. A pleasure that knew no limits.

By the time the last remnants of Spike’s legendary orgasm had died off, Rarity had barely the presence of mind to guesstimate their heights. A rough estimate put them near seven-hundred feet, able to tower over most of the sky scrapers in Manehatten. But honestly, what was the point in keeping track anymore? It wasn’t as if anyone could stop them, and they damn sure weren’t going to stop themselves, until not even the tallest landmark could be used to measure their greatness.

Twilight had moved from the deep hole from the library up to the street, her mind racing a thousand miles an hour. She had found a spell in Terra’s Tome of Transformation that seemed promising, but the math wasn’t quite adding up. Hmm, maybe if I embed a resonant loop into the spell matrix, and then try variable outputs of thaumatic energy?

The miasma of books from before had been whittled down to only three, though they had been replaced by nearly a dozen scrolls that were being furiously scribbled on by accompanying quills. She read, analyzed, calculated, and created as fast as she ever had, driven on by the tremors growing in intensity. By now the scent of sex was thick in the air even despite the distance. She hadn’t bothered to look for nearly five minutes, but by now she had a reasonable grasp on the magic from the artifact that was powering Rarity’s growth, and she definitely knew what Spike was capable of. If she didn’t come up with something fast, they’d just keep growing and growing. And with the volume of their orgasms increasing exponentially, it would be long before their combined output would be able to flood Ghastly Gorge. That much fluid raining down would—

“Hey, Twi?” Pinkie stumbled back and forth behind Twilight, balancing one of her “ball emergency” balls on her nose. “How many tons of sugar do ya think I’d need to make a cake big enough for both of them?”

The furious scritching of the quills intensified, the sound now deafening. Just not deafening enough for her liking.

“I mean, they’re like a bajillion, ga-gillion feet tall now! It’d have to be a cake at least... thirty-five long and weigh approximately six-hundred pounds!” She gasped ever so lightly. “That’s a big cake...”

“Pinkie...” Twilight nearly growled.

“How many calories would that be?! Would it even be enough for them?”

With a frustrated sigh, the floating cloud around her jerked to a halt. “They’re not being powered by chemical energy right now. They’re fueled by magic. To maintain homeostasis at those sizes, not to mention allow for further growth, they would—”

“A-heh-hem!”

Twilight let out a strangled yelp as the miasma around her fell to the ground. She turned with the approximate speed of a glacier to see Applejack, Rainbow Dash, and Fluttershy glaring at her. Well, AJ and Dash were glaring, anyway. An audible gulp, and Twilight flashed the shakiest, toothiest smile in her life. “Uh... h-hi gir—”

“Shush!” Applejack hissed, holding a hand up. Her eyes never stopped boring into Twilight's as she extended her other hand in the general direction of the goopy titans. “What?”

“Ah-th-th-th-th-th,” Twilight said, waggling a finger at her friend. “I know what you’re thinking, and no, this is not my fault! I did not ‘miscast a spell,’ or ‘meddle with forces I didn’t comprehend’ or anything like that! I had a reasonably approximate estimation of what the artifact would do to Rarity. She just happened to have an adverse reaction to the combination of the growth magic and the magic I was using to power it!” She nodded with a sense of finality.

AJ and Rainbow Dash shared a look, before turning back to their barely stable friend. “So,” Dash said slowly, “you miscast a spell while meddling with forces you didn’t comprehend.”

A series of sputtering noises came from Twilight as her eyes darted between them. Finally, with a frustrated huff, she threw her arms in the air. “I guess?!”

“Okay,” Fluttershy said. “But... what happened to Spike?”

Twilight let out a sigh and brought her army of parchment and books back into the air. “Dragons are descended from apex predators. Somewhere deep in the recesses of Spike’s mind, he has an instinctual drive to be the biggest and strongest thing in his territory. And even though there are ponies taller than him, it's a negligible difference, a few inches at most.” A particular scroll floated close to her face. Hmm, this looks promising. “Plus, we’ve seen that Spike can undergo sudden magical growth spurts triggered by powerful emotions. So when somepony grew to the size of a house and just refused to shut up about how big, strong and powerful she was, Spike went a bit... eh, f-feral.”

“Okay,” AJ said, stepping before Twilight and batting the scroll away. “I’m gonna go out on a limb here and guess that y’all don’t currently have a way to fix this.”

“That’s what I’m working on,” she said, stepping back and resuming her research.

“Well, you better work fast,” Rainbow said. “They’re still getting bigger. Like... a lot bigger, a lot quicker.”

Rarity lay propped on her elbow, softly grunting as she gently thrust her monstrous cock in between her pillowy breasts. Spike sat on his knees, still catching his breath after his earth moving orgasm, his claws slowly carressing both his muscles and his cock which had not softened in the slightest. Eventually, he made his way over to her, his knees leaving large craters as he thundered across the ground. He reached down and grabbed her shaft, which must have weighed more than half the buildings in Ponyville combined, and with nary a grunt of effort, hefted it up and out of his way. He gently—as gently as a near thousand foot tall being of pure muscle and sex could—threw a leg across her to straddle her voluptuous body. She let out a grunt as her cock found itself wedged between the sculpted cheeks of his ass.

And for a good little while, they just... stayed there. Gently grinding against each other, his dick rubbing over her prominent washboard abs, hers still sandwiched between his cheeks. The scene was surprisingly quiet, aside from the still groaning earth beneath them and the crunch of trees being crushed by their titanic weight. But the only noise the pair made were quiet little grunts and growls. They were just... enjoying themselves, getting a bit lost in the feeling of each other's body, the muted sounds of their pleasure, the heady scent of sex and cum that hung in the air like a comforting blanket.

She looked into his eyes. They still gave off light, but now it was a gentle glow instead of a blinding incandescence. His face, while still looking feral and vaguely angry, had softened. And for the first time since Twilight had initially pressed the button on her little device seemingly a lifetime ago, she smiled at him. It wasn’t an ear-to-ear grin. Just a tiny, warm smile, devoid of the contempt or challenge it had from before. This was... nice.

Ever since the first ray of that delicious magic had entered her body, all she could think of was herself, of being the absolutely biggest, sexiest, most powerful being in existence. But now, seeing herself on even ground with another just as big as her, she found herself... not minding all that much. In fact, some incredibly tiny voice in the far recesses of her mind whispered that with someone just as powerful and fabulous as she by her side, did being the biggest really matter?

A gurgle and a pressure between her thighs snapped her back to the present. While their growth may have momentarily paused, her mighty testicles were still churning out more and more cream, and it had to go somewhere. As she contemplated her next move, she finally looked down towards her midsection, and a dainty snort escaped her mouth.

Beyond the rolling hills of her breasts, she lay her eyes on Spike’s leaking cock and found it a bit... small. His overall body was just as mind-numbingly large as hers, and his dick would absolutely eclipse anything that ever lived—aside from her, of course—but in proportion to his body, it was comparatively tiny.

Well, we know how to fix that, now don’t we?

“Oh, poor Spike,” she cooed, once more dressing her face in that smugly challenging look. “It appears that certain parts of you just can’t keep pace, now can they?” She gave a few light taps to his shaft.

As predicted, the glow in his eyes redoubled, and he growled. This time, however, he did not scowl. His eyes were still fierce as ever, but she could swear she saw the corner of his lip tick up ever so slightly. Regardless, he brought his beefy arms closer to his chest, his biceps nearly as big as his head, and tensed his body tight, almost curling in on himself. Before Rarity even had the chance to arch an eyebrow in confusion, Spike threw his arms back and roared, letting loose a torrent of green flame to the sky. In between the time it took to blink, his angry red shaft lurched forward. It surged in length and girth at lightning speed, ending at just long enough to gently boop Rarity’s nose, leaving a dollop of stick pre. He let out something in the realm of a growling chuckle, but her eyes were locked onto the cock now tantalizingly close to her mouth.

“Oh, my word. Woof.”

Applejack stood firm despite the tremors slowly growing in intensity. Her deep connection to the earth kept her grounded. Rainbow Dash, however, simply hovered in the air next to her, while Pinkie bounced giddily in time with the quakes. The overwhelming stench of sex was thick and cloying in the air, and echoing grunts, groans, and wet slapping could be heard throughout the town. All of their eyes were glued to the ever growing pair of bodies on the horizon, performing sex acts that made even the bold and experienced farmgirl blush. “Hoo-wee,” she said, wiping the back of her hand across her forehead. Despite them being three miles or so away, Applejack would have said they looked no more than 75 feet away to her. Her mind couldn't even fathom how large that meant they actually were. “Those two ‘r goin’ at it like a couple of bulls in rut.”

“Yeah, no kidding,” murmured Dash, her eyes just a hair too wide and her mouth ever so slightly curled into a smile.

“Actually, with all the aggression and displays of dominance they’re showing, it’s more reminiscent of timberwolf mating than bulls.”

All three girls slowly turned towards Fluttershy. The mare blushed a brilliant shade of red and tried to retreat even further into her mane. “Uh, I-I mean... eep.”

“I got it!” Twilight shrieked, leaping out of the hole in the ground with her wings fluttering. In her hands she held a scroll with more ink on it than your typical motorcycle gang, and an odd looking object. Her mane was disheveled, random hairs sticking out at odd angles, achieving a look she had not had since before her ascension. Still despite the manic energy of her expression and movement, her tone was clear and confident. “I know how to drain the magic from both of them! However, it’s going to take a whole lot of power to pull off, more than even the Elements of Harmony can generate.

“Rainbow Dash, I need you to fly to Canterlot as fast as you possibly can. Tell Celestia and Luna to teleport themselves and you back here immediately!”

“Aww,” Dash pouted. “Do we have to?”

Applejack swore she could hear literal gears screeching to a halt in Twilight’s mind. “What?”

“Well, I mean,” she began, “they’re not hurting anypony, and they’re not destroying any property, and it’s... actually kinda hot, so—”

“RAINBOW!” Twilight’s shout echoed across the town, even over the quakes in the groaning earth.

Dash heaved a deep sigh. “Well, why do I have to fly all the way to Canterlot? Why can’t you just send Celestia a message like you always do?”

This time, Applejack was sure sparks flew from Twilight’s ear. Her face locked in the deepest rage she had ever seen from the dorky alicorn, Twilight pointed with both arms at the now rapidly growing purple body, and let out a forceful grunt.

“Oh. Oh, right,” Dash said. “Okay then.” She rolled her shoulders, cricked her neck to the side, and blurred into the air fast enough to nearly knock Twilight off her feet, a rainbow contrail heading towards Canterlot at extreme speed.

The girls once more turned towards the giants in the distance. “Do you think she’ll make it back before something really bad happens?” Fluttershy asked.

“Of course she will!” Twilight said with a wide grin that looked like it would break under a stiff breeze. “Everything’s going to be just fine.”

Rarity was unable to properly moan, despite the mounting ecstasy she felt. This was largely due to the impossibly thick slab of dragon meat being forcibly shoved down her throat over and over. Spike stood crouched over her, to allow his unearthly nuts to swing freely, snorting and snarling like a wild animal in time with his thrusts. Both of his hands held onto her large, thick nipples, ensuring her mountainous titflesh stayed snugly against his shaft as he pounded her poor abused throat.

The ecstasy washing over her came from multiple places at once. The ridged surface of Spike’s dick stimulated the hyper-sensitive skin of her fat tits. Her own legendarily large pillar of flesh was still buried between the impossibly hot yet luxuriously smooth scales of his rump, rubbing her dick up and down with every thrust of his hips. But most of all, it was the growth.

She didn’t even remember when they resumed their trek to the stratosphere. All she knew was it was now a constant. She didn’t even need to reach for that inner flame anymore. The fire was evenly spread throughout her body, burning her every nerve with that tingling energy signaling her expansion. Her muscles constantly tensing and relaxing, the indescribable feeling of her limbs stretching and lengthening, how her tits, cock, and balls were ever expanding, giving her ever more surface to pleasure. She had long since stopped keeping track of their exact sizes, but an objective observer would notice they had recently surpassed a thousand feet tall from head to toe, and showed no signs of slowing.

And she could feel Spike caught in the same cycle. Even as she felt the ground beneath her groan and struggle to support her incalculable weight, as the trees that felt like mere hairs were ripped from the ground under the force of her expansion, he never seemed to lag behind. The delicious cock in her mouth never seemed to feel any bigger or smaller, but remained just the right size. It was as if their bodies had synced, like the limitless cauldrons of magic that spurred them to literal new heights had somehow connected.

For some reason, she found the idea unendingly erotic.

But for as stimulated as she was, she just couldn’t seem to plateau. Despite every fiber in her body screaming in ecstasy, she needed more. Above her, Spike seemed in a similar state, his closed eyes twisted into apparent frustration. And Rarity knew just how to fix all that.

As Spike continued his assault on her esophagus, she ran her hand across his now eight-pack abs, tracing their every contour and earning a snort of approval from the drake. However, her other hand had surreptitiously made its way to her giant, turgid member. Spike continued to thrust away as she began to lower her cock into position, awaiting the right moment to strike.

It came rather quickly. Spike gave a particularly hard thrust into her throat, going deeper than he had been, and Rarity made her move. She slammed the broad tip of her drooling cock before the dragon’s ass. At the same time, she gave a hard shove on Spike’s midsection. Thanks to the raging rivers of pre her dick was letting loose, even his tight, inexperienced pucker could put up little resistance, and the first quarter of Rarity’s girth jammed itself into his rectum.

The reaction was immediate for both of them. Spike’s eyes shot open, his head thrown back to the sky, as a roar that could be heard as far away as Dodge Junction bellowed from his mouth. The torrent of flame let loose from his fanged maw would have even burned the Solar Princess’s hide. Rarity’s own scream of immeasurable pleasure at the impossibly tight walls of his ass squeezed down on her dick so hard was nearly as loud. Rarity’s eyes were twisted in concentration as she wiggled and thrust her dick even further into his passage. Her tongue lolled out of her mouth as her brain was almost overloaded with sexual energy. She managed to look up at Spike, just a tad worried she had gone too far, but those fears quickly died at the look of exquisite pleasure upon the drake’s face. He finally looked down and the pair locked eyes. This time, he really did smile.

The brief moment of tenderness died as Spike thrust his tapered cock back into Rarity’s waiting mouth. However this time, he did not shove himself into her throat. Instead he thrust forward until just the tip of her cock was inside him, then violently threw himself backwards. This alien feeling of her being inside someone else was new, and maybe a bit better than the old way she decided as her lover squeezed his sculpted cheeks upon her.

They quickly found a rhythm. Every time he thrust into her eager mouth, she would buck hard when he pulled back. This see-sawing motion gave them both their turns for pleasure, but it also kicked their growth into overdrive. The pair surged in size. Fifteen hundred feet. Two thousand a few seconds later! Three thousand seconds after! It seemed their meteoric race to the sky was accelerating exponentially, and both were perfectly fine with that.

Rarity’s peak was finally approaching, egged on by the fact that Spike’s thrusts into her mouth were growing shallower. With every retreat from the warmth of her mouth, he would progressively push back harder, burying more and more of her surging cock in the heavenly confines of his rump. Her thrusts were growing harder, as well. Her ever expanding ass was bouncing off the ground, causing earthquakes of increasing magnitude.

By now, Spike was bucking backwards so far that even his mind-shatteringly enormous member no longer rested between the quivering mountains of her tits. His face was twisted in an almost angry expression as he pushed himself back harder and harder. He gnawed on his lip so hard that droplets of greenish blood stained his chin. And yet, he kept spearing himself onto her. One of his hands was furiously jerking his slicked cock, while the other was rubbing at the growing bulge in his belly, the engorged head of Rarity’s cock pushing hard enough to deform even his iron-hard abs.

Rarity subconsciously observed all this. All of her waking mind was focused on one thing and one thing only: the borderline painful squeezing of his ass on her dick. Complex thought was quickly draining from her mind. This behemoth of a dragon, this apex predator whose ancestors once struck fear in the heart every creature in Equestria, had submitted to her. All his muscle, all his size, and all his strength was dedicated solely to the task of bringing her pleasure. She snorted and began to pound his rump even harder. Her hands tightly gripped his hips, giving her even more leverage to plunge further into his depths. The knowledge, along with the rapidly approaching orgasm, turned the fire in her veins to magma. Her growing form surged outward even faster. By now, she would been able to crush all of Ponyville with her plush ass, but still she grew, more and more of the earth beneath her crumbling and shattering under her sheer size. And yet, he kept pace.

It was almost upon her. She looked ahead and saw that her cock was driving so far into him, the bulge from her thrusts reached out far enough to impact his dick. His head was aimed towards the heavens, both claws now blurring across his throbbing member. His deep growls growing more and more frequent, signalling he was just as close as she was.

Rarity closed her eyes as she felt it. Her over a mile long body was quivering with the closeness of her release. Her balls surged outward enough to force her legs apart, the oceans of potent seed within screaming to get out. She could imagine poor Spike’s washboard midsection bloating out under the force of her cum. Yes, she would empty so much spunk into him that he would look pregnant. Ten months pregnant, with quintuplets. It would force itself out of his mouth and, combined with his own infinite orgasm, they would drown the world in their essence. They would grow and grow and grow until they surpassed the planet, the solar system, the galaxy. Never stopping, always growing. Rarity’s mouth opened to signal to all of creation that she was about to let loose and—

Flash!

With a dainty yet powerful moan, Rarity climaxed. She felt her cock pulse for several seconds once, twice, thrice, her hot seed surrounding her member as she emptied what must have been at least a quart of cum into her lover's intestines. Above her, Spike let out something between a growl and a whimper as he came. A pencil thick stream of jizz shot up to just over his head before splashing back down. As his orgasm rode, the rhythmic tightening of his ass managed to squeeze a few more spurts of fluid from her.

Suddenly overcome with fatigue, and let her flexed hips sink to the ground, pulling her softening shaft from his rump. Apparently feeling the same exhaustion she felt, Spike immediately collapsed on top of her. She let out a loud “oof” as his heavy weight fell upon her smaller body, but just as quickly, he wrapped his beefy arms around her and rolled to the side with a mighty sigh. Rarity allowed her limp body to go along for the ride. He came to a rest on his back and pulled her tightly to him. She didn’t know if it was instinct or simple exhaustion that did it, but she lay her head across his broad, muscled chest without thought. Through the rapid yet slowing rise and fall of his chest, she could hear his heartbeat, also winding down after such an extended time of racing. Her own breathing was finally starting to settle down, aided by the surprisingly soothing warmth that radiated from his diamond hard scales.

There they lay for an indeterminate period of time upon a bed of splinters and dirt, surrounded by the destruction they had wrought, but that all seemed so far away at the moment. She allowed herself to fall into a state not quite asleep, but just lost in her own consciousness, letting her tired body recuperate for a bit. She found that she quite enjoyed cuddling with a dragon. The smoothness of his scales and the aforementioned warmth were quite pleasing. Perhaps I should have tried sooner.

Eventually, her curiosity got the better and she slowly opened her eyes. The sun was nearing the horizon, yet there was plenty of daylight for her to assess her... new self. She had no idea what happened, what had not only ceased their ever advancing expansion, but reversed it. Reaching within, she found the flame that had fueled her growth was gone, as well. They quite obviously were no longer mile tall behemoths—a tiny part of her shuddered at the thought, but she found herself far too tired for arousal—but neither had they reverted back to their old selves. In fact, looking across herself, she found herself quite pleased.

Where before she had been a dainty five-foot-two, her expert eye for size now put her at about six... one? Maybe two? Either way, nearly every bit of her had seen marked improvement as well. Yes, she had always desired to be a bit taller than she had been, but she also sometimes wondered what it would be like to be more voluptuous. She no longer had to wonder. Her breasts were quite a bit larger than before, no longer outrageously huge, but a nice, hefty D-cup or so. In defiance of gravity, they didn’t sag at all, remaining perky and firm against her body. A body that was now much more defined than before. She had always taken care of herself, but never felt the drive to achieve the firm definition she now possessed. Her body wasn’t packed with muscle, but what was there was rock hard, clearly visible abs, her soft coat doing little to hide the contours of her muscles. She had what one might call a “swimmer’s physique.”

A weight shifted between her legs. She looked down and let out a single airy chuckle. It seemed her “new additions” were here to stay, but just like the rest of her, no longer in the realm of ridiculous. While she wasn’t the most experienced when it came to a stallion's equipment—though certainly not a prude, thank you very much—she hazarded a guess that her softened member might reach somewhere around a foot long when erect. Her testicles were similarly impressive, each maybe the size of a large lemon. Just the memory of how it had felt to have her shaft inside someone else left her quite pleased that she had retained her new toy.

Spike shifted beside her. She turned her head and her jaw dropped. The dragon had gone from a respectable six-foot-three to an imposing seven-foot-four or so. While before he’d had the build of somepony who didn’t really work out but was just naturally strong, what lay next to her was nothing short of an actual draconic Herdian. His body rippled with rock-hard muscle, not bursting at the seams, but occupying that mysterious sweet spot between peak masculinity and practical joke. With his physique, he would make even Big Macintosh and Bulk Biceps feel inadequate. But when her gaze drifted towards his lower body, she felt a slight thrill up her body.

Woof, indeed.

Nestled between his perfectly sculpted thighs lay a dick worthy of worship. Her estimating gaze put it at around sixteen inches had he been hard, and probably thicker than any she had ever seen. Well, before this afternoon, of course. Not so hidden beneath were a set of testicles the size of large oranges, drawn up tantalizingly close to his body, achieving an aesthetic that would tempt even the straightest of stallions to take a feel. Gazing back up, she saw Spike staring at his left bicep in utter awe. He gave it a flex, and let out a tiny groan, accompanied by a muttered “Oh, yeah.”

With a breathy giggle, she shook her head, laying back down to gaze at the sky. I suppose I shouldn’t be surprised. I mean, dear Spike has always had a bit of an ego about him, so...

Oh.

Oh...

She cleared her throat. “Um, Spike?” So engrossed in his new body, he didn’t seem to hear her, so she repeated a bit more forcefully. “Spike.”

“Oh!” Spike said, shaking his head a few times before turning to her. “Yeah, Rarity?” He wore that same warm, eager smile he always had around her. It just drove the knife in harder.

“Listen, Spike, I...” She let out a long breath. “I-I want to apologize, for all those things I said today.” She felt him tense ever so slightly, and the words came pouring out. “You know how dear you are to me, Spike! I would never disrespect and humiliate you the way that I did! I just... that magic was so... intoxicating. I-I’d never felt so... strong, so sexy, so powerful, and I...” She hung her head, unable to meet his gaze. “I suppose it all went to my head.”

He was silent for a few moments, which only made her feel worse, until he sighed. “It’s okay, Rarity, really. Trust me, I... I know better than anypony in Equestria what it’s like.”

“You... you do?” she said, facing up to him again, observing the pensive look on his chiseled features.

“Yeah, I...” he shifted uncomfortably, running a hand across his face. “Jeez, I’ve never even told Twilight about this. Okay, so, you remember that little... incident on my birthday a bunch of years ago?”

Rarity nodded. It would be difficult to forget such a thing. Seeing a charming, adorable little boy grow into a massive, hulking brute, out of his mind with greed, stomping around....

“Ah,” she said with a nod.

Spike sighed. “Yeah. Well, what I never told anypony was that when I had finally given in, and just let myself grow bigger, and bigger, and stronger..." He paused, apparently struggling to get the words out. "I liked it. It felt good. Really good. In fact, I’m pretty sure the only reason I didn’t just start jacking off was because I was only eleven and didn’t really understand what those feelings meant yet.

“So, yeah. Believe me when I say I totally understand what you were feeling. And ever since then, I’ve... kind of felt like I could do it again if I really wanted.

That got Rarity’s attention. “Really? Then, if you liked it so, why haven’t you at least tried?”

Spike shrugged. “Fear. I mean, the last time I completely destroyed two whole blocks of Ponyville. There were so many injuries, it was a miracle nopony was killed! In fact, I... I think that’s the reason why I grabbed you and dragged us all the way out here. I can’t be sure, though. My, uh, conscious brain wasn’t exactly in charge at the moment.”

Something Spike had said sent a sliver of ice through her heart. She leapt to her feet and let out a tiny squeak as she surveyed their surroundings. The once idyllic White Tail Woods now resembled some kind of apocalyptic hellscape. Everything within several miles of them was completely destroyed: trees, bushes, the very grass that covered the ground were all gone, replaced by detritus, dirt, and large cooling pools of cum. Further out, what wasn’t destroyed was covered in a thick layer of her and Spike’s combined juices, looking all the world like a blanket of ash. She desperately strained her eyes to see something, anything green. The verdant tree line stood many miles away from them.

Rarity staggered as if struck. Her pupils drew to pinpricks, and her eyes began to water. “Oh, my word. I... I-I-I destroyed your home! If we had remained in Ponyville...” Her heaving chest felt as if under a ten ton weight. “If... i-if I alone had remained there and did what I had planned on—”

Strong hands grabbed her shoulders and spun her around almost violently. Spike took her chin in one hand and forced her tearing eyes to meet his firm gaze. “Rarity, Rarity! Look at me, okay?” She gave a shaky nod. “It’s alright. Like I said, I understand what it’s like to be so drunk on magic that you can't think right. I know what you were feeling because I felt it back then. On my birthday, I would have just kept on growing and growing, getting bigger and stronger, because I didn’t care about anything, anything,” he stressed, “aside from my own pleasure and taking more stuff.”

“But...” she sniffled, “but you came back. You realized that what you were doing was wrong and you stopped, but I... even right to the end I would have kept pushing, getting bigger and bigger until—”

Her tirade was silenced when Spike leaned down and pressed his lips to hers. After the barest moment of hesitation, she leaned into it, allowing him to gently kiss her. This was no lust-crazed, frenzied make-out session like before. This was... tender. Passionate. For some reason, his strong presence lifted just a bit of the weight from her heart. She lay her hand upon his broad chest, allowing herself to melt into him a bit.

Eventually he pulled away, and once more showed her that damnable warm smile of his. His hand never left her chin as he spoke. “I was saved because a good friend had my back, and didn’t let me fall. And I’m pretty sure that’s what just happened. Given everything that’s happened today, it’s fairly safe to say Twilight fixed us before we could lose ourselves completely. Plus, heh, I don't know if it's the same for mares, but I know I'm never in my right mind when I'm about to cum, so...”

She nodded, the weight on her chest beginning to lift. “Still, it’s difficult to think that was truly so lost in myself that I didn’t even care if the ponies I love most got hurt.”

“Hey, it’s not like I was helping matters. I was barely even capable of complex thoughts, let alone concern for anypony else. Look, you can’t dwell on it, Rarity,” he said. “I did, and I hated myself for the longest time. I felt like I had this... monster inside me. A rampaging beast who wanted nothing more than to destroy everything I ever cared about. That I was a terrible, selfish creature who would risk his friends, his family, all because it felt good. I felt... I felt like I was damaged goods.

“And it never really went away, until now.” Rarity shot him a quizzical glance. “Well, I mean now that you’ve gone through the same thing and felt exactly like I did, I think it’s a reasonable assumption that most any pony would react the same way if they were that high on magic and pleasure.”

She pondered that for a few moments before slowly nodding. “I suppose that makes sense.” She looked up at him with a tiny smile. “When did you get so smart?”

“Hey, I grew up with Twilight, okay?” he said with a grin.

Rarity let out a little titter. “That makes sense. So... you forgive me?”

“Of course I do,” Spike said, his smile widening. “It’d be a little hypocritical of me not to. I mean, I don’t think I’m being shocking or insulting when I say that both of us have a little bit of an ego problem.”

Rarity sniffed, haughty thrusting her nose in the air. “Well, I’m quite sure I have no idea what you’re talking about!” She held her snooty pose for a few seconds longer before turning her eyes to him. She broke out in giggles at the absolute deadpan glare he was giving her, though he quickly joined in the laughter.

Once the moment had passed, she languidly stretched her arms high above her head. “Well, I think this—oof!” As she tried to begin walking, her thighs squeezed almost painfully on her new assets. Halting and spreading her legs wider, she looked down at the snug sack between her legs. Her hips gyrated and she was a little fascinated at their movement. “Hmm, I suppose that is going to take some getting used to.”

“You’re telling me,” Spike added, hefting one of his heavy balls in his hand. “How the hell am I supposed to sit with these things?!”

After a few more moments of laughter, Rarity sighed. “As I was saying, I do believe this qualifies as the single oddest first date in Equestrian history!”

“Heh, yeah, you’re ri—” Spike’s entire body tensed. He slowly moved to face her completely. “Wait. Uh, d... d-date?”

For some ridiculous reason, in spite of everything the pair had engaged in today, Rarity found her cheeks warm at his eager gaze. “Well... yes. I-I mean, we both know that you’ve wanted to for the longest time. And if I’m being completely honest, I’ve found myself... perhaps warming to the idea since you’ve grown up. So,” she looked up at him with just a twinkle of hope in her eyes, “what do you say?”

It was a solid five seconds before Spike realized that she was expecting an answer. “Uh, yeah, sure!” he blurted out, his grin threatening to break his face. “But where can we possibly go from... here?” he said, gesturing around them.

“I think it best we... hit the brakes a bit, as it were. I say we start with a nice light—”

“A-HEH-HEM!”

Both Rarity and Spike stiffened at the noise, Slowly, they turned around to see their friends, along with Princess Celestia and Princess Luna, all drenched from head to toe with sticky cum. They were all glaring directly at them, except for Celestia, who wore a bemused little smile, while Luna was barely restraining laughter... and Rainbow Dash, who sported a very lewd smirk as she openly ogled their new bodies.

Twilight took a step forward, a deeply disturbed, toothy grin on her face as her mane still managed to stick out wildly even under the weight of the thick semen. She didn’t say a word. She just... smiled.

Rarity and Spike shared a nervous glance before turning back to them with shaky grins and spoke in unison.

“Uh... sorry?”