Bragging Rights

It had been a long day for Twilight Sparkle. Organizing your very first town festival as a princess took a lot out of you. You had to dot all the i's and cross all the t's, and check on the tasks you delegated to make sure other ponies hadn't dotted their t's or crossed the i's. It was exhausting. It wasn't at all like the Summer Sun Celebration, where ponies had learned how to prepare for it from their grandparents, who'd learned from their grandparents, and so on. This festival was brand new, and attention had to be paid to every detail.

"We'll have to remake it," she sighed. "The whole banner." It pained her to say that, but she was in charge, and it was her duty to make the tough decisions. How could anypony take this festival seriously if the lettering was a gaping five millimeters off-center? How?

The banner-makers groaned as they rolled up the banners and trotted off, muttering under their breath the whole time. It was hard to feel too sorry for them. Especially not after that lettering job. Twilight had the deepest of sympathy for being told to redo something — she really did — but they most certainly weren't warranted in calling her a 'wound-up bitch.'

Thank Celestia alone Rainbow Dash hadn't been there to hear that. No scale in Equestria would be able to measure the size of her ego if she'd heard somepony agreeing with her.

"I am not wound-up," she huffed, rubbing her thighs absently together. So what if she hadn't gotten any lately? So what if she'd been too busy coordinating the festival to spare any time for personal matters? What did that have to do with anything?

Although... She paused a moment as a slight, tempting twinge sparked between her legs. Maybe it wouldn't hurt to take a short break to ease some of her stress. The overall benefit to her psyche would qualify as improving efficiency, wouldn't it? Making the most efficient use of time could only be a good thing... Her horn sparked, the light purple glow of her magic almost touching her lips before she caught herself. No, no, no! She had to see this project through to the end. There'd be time enough for pleasure once she was finished with business.

And speaking of business, she could only hope Cloudchaser was sprinting toward her with good news on the weather. The pegasus skidded to an impressive stop just in front of her, and greeted her with a half-hearted salute.

"Problem!" she burst out, between gasps. "Big! Real... real big!"

"What kind of problem?" Twilight cocked her head, eyebrow raised. It didn't exactly take a genius to clear the skies over the Ponyville market. "How big, exactly?"

"Pretty big." Cloudchaser made a face. "I think you need to come see."

"Okay, okay." Twilight groaned. There were exactly one hundred and eighty-two other things that needed her supervision today, and she didn't have time to waste on Cloudchaser's mistakes. More than likely somepony had gotten themselves stuck in a cloud, or a cloud had gotten stuck in somepony again. At least Rainbow Dash wasn't around to make things even wo—

She bit her lip. Where exactly was Rainbow Dash?

No. No, Rainbow Dash wouldn't have caused any more trouble today. If not out of the goodness of her heart, then because she was currently learning a valuable lesson about bragging. No, surely it wasn't Rainbow Dash. It had to be something simple and small.

The two of them paused as a tremor shook the ground. A rhythmic thump-thump-thumping that sent a shiver up Twilight's spine. Okay, it wasn't small. But it could still be simple. She just had to hope. And she did hope, right until they rounded the corner and she realized where Rainbow Dash had gone.

In a word, Rainbow was big. Huge, even. She stood about as tall as the market's second-story windows, serviced by a small fleet of pegasi. "Mmm," she purred as they worked and stroked her stiffened wings, nearly the size of parachutes. The ground trembled with another thump-thump-thump as her hooves tapped against the ground. "Good job, guys," she groaned, stretching herself out. "You're almost as good at this as I would be."

And with that, Dash went from being a big problem to being an even bigger problem. The pegasi preening her wings struggled to hang on as Dash's body stretched taller and taller into the sky, her head beginning to peak over rooftops. Droplets of wet, sticky arousal rained from her engorged pussy, the ground shaking lightly as her moans grew even deeper and louder. She grinned and turned her head, looking expectantly at her — for lack of a better word — pleasure slaves. "Keep it up."

Twilight needed a moment to pick her jaw back off the ground, and a moment longer for her blush of arousal to dissipate. Whatever was causing Rainbow Dash to grow like this, she was clearly enjoying it. Very clearly. She flapped her wings and flew up into the sky, shouting as loud as she could to make sure she was heard. "Alright, alright, I've seen enough. Everypony get back to work, this instant!"

None of the smaller pegasi felt like arguing. They split and scattered in every direction, almost as though hoping it would keep them from getting caught. Though, whether they were more afraid of Princess Twilight chasing them or a ten-times size Rainbow Dash, she wasn't sure.

The shout had even been enough to shake Rainbow from her pleasure trance. A giant purple eye opened, annoyed, and focused itself on the relatively tiny purple pony. "Spoilsport."

"Spoilsport?" Twilight spluttered. "I'm the one causing problems? Rainbow Dash, look at you! You're huge!"

"Duh." Dash fell back onto her massive haunches, the buildings around her shaking uneasily on their foundations. She rans her hooves idly over her body — chest, flank, and even quick dips downstairs — as if wanting simply to feel her titanic new body. "I have to hand it to you, Twi. You really outdid yourself with that spell. I can't remember the last time I felt this good."

The spell! Everything clicked in Twilight's mind with that single piece of information. Something had gone wrong with her spell! It wasn't merely making Rainbow's head swell bigger, it was making all of her swell bigger. She grimaced as she processed the consequences of that single, critical error. Not only had she failed at teaching Dash a lesson, she'd given her an incentive to keep bragging, and bragging, and bragging without end. The image of a gargantuan Rainbow Dash, eying Canterlot mountain as a dildo, ran unbidden through her mind. "Oh no."

"Oh yes!" Rainbow shuddered, seemingly more focused on her own pleasure than Twilight's dilemma. She worked a hoof back down between her legs, and this time she kept it there. "That's the stuff."

Twilight shook her head. Hard as it was to not be distracted by Rainbow's total lack of modesty, she had to remain focused. Dash's abuse of her miscast spell would cause a lot of trouble if left unchecked. Thankfully, she never learned any spell without an understanding of the proper counter-spell. She primed her horn and launched the counter-spell straight at the overgrown Dash. Hard to miss a target that large. She could only pray it worked.

The magic hit Dash square in the chest, diffusing across her body before fading entirely. Far from shrinking back down to size, Dash seemed to swell even larger. Skin stretched and bones cracked as she grew, her eyes fluttering with pure pleasure. Her hoof worked faster and faster, spasms running through Dash's body as her orgasm built, right until a long, piercing scream shattered every window in the area. A gush of warm marecum ran from her love tunnel, coating the streets in her own slippery juices.

Dash sighed, content in the afterglow. "Got any more of that, Twi? I want to do that again."

"Well, too bad! We're not going to do that again." Most definitely not. She hadn't been prepared for the counter-spell to not only fail, but to make the problem even worse. At a rough guess, her original spell had only grown in power and potency alongside its host, overwhelming any attempt at countering it and converting the magic into more raw growth... and pleasure. She winced, realizing that she'd have to find a way to subdue the enormous Dash without magic.

"Fine," Dash shrugged, stretching out for round two. "I can handle it on my own."

Think! She tapped her head and racked her brains, trying to come up with a solution. It was already tough enough to devise a plan, and Dash wasn't helping matter. Her breath came in gustlike gasps, hot and heavy, low moans already rumbling as she stroked her oversexed pussy. Twilight tried not to blush, even as she felt a trickle of warm wetness run down her own leg. Definitely distracting.

Still, she was experienced in thinking under pressure. An idea hit her: the spell powering Rainbow Dash's growth was itself powered by pure ego. If she could only find a way to burst Dash's bubble — let out all that hot air — the spell would be broken and she'd shrink back to normal size! Genius! She nodded, proud of herself for coming up with such a simple and elegant plan. The only problem, of course, was how to bruise Dash's ego when she was bigger than a dozen of her put together?

"Rainbow Dash!" she shouted, loud as she could manage and still only just over Dash's lustful panting. "I challenge you to a competition!"

Dash's stroking slowed to a stop. She cracked an eye open, grinning. "Yeah, short stuff?" she snickered. "Sure you want to do that? You know I can beat you at anything." A groan as she stretched even larger. Where before Twilight had been flying at eye level, she now hovered around Dash's shoulders. Once again, Dash could look down on her. "Just name it."

"Uh..." Twilight hadn't thought quite that far ahead. A race was definitely impossible. Lifting something heavy was a sucker's bet against a giant-sized pony. There had to be something that wouldn't give a gigantic Dash the advantage, but coming up with the right contest was even harder in the face of Dash's overwhelming confidence. She gulped as Dash licked her lips, a predatorial gleam flashing in her eyes. "Well..."

"Time's up!" Dash boomed. "Don't worry, Twi. I've already got a great idea, and you're so wound up, I think you'll like it too." She laughed, so loud now that Twilight had to cup her hooves over her ears. "A get-off. Both of us masturbate. First to blow wins."

There were no words for Twilight's horror. "You can't be serious!" Her eyes widened to the size of dinner plates. "You can't possibly expect me to accept that!"

"No skin off my bones if you don't." Dash shrugged. "I'll just stay here, then. Growing..." She leaned back, reaching a soaked hoof slowly back down toward her most private parts. "...Enjoying myself."

"Okay, okay!" Twilight groaned. She'd regret this, she knew she would, but she absolutely couldn't let Dash get any bigger. A quick glance around told her that there were no bystanders, at least. All frightened off by Rainbow Dash. Nobody would have to see her masturbating. "Deal."

"Deal." Dash nodded, satisfied. "And since I'm so nice, I'm going to give you a half-minute headstart."

"Gee, thanks," Twilight muttered, landing softly on the ground — well away from the results of Dash's previous orgasm. It wasn't impossible for her to win this. Rainbow Dash's libido seemed nigh-impossible to fully sate, but she'd have to lose steam at some point. And she'd be starting from behind. Twilight could feel the dampness growing between her thighs, her pussy already anticipating some much-needed attention. Yes... She could do this. "Ready... Set..."

"Go!" Dash's voice boomed.

And off she went. Her horn lit up, readying a host of her favorite pleasure spells. Perhaps she hadn't been 'getting any' lately, and she'd never quite done this outside, but she was no stranger to relieving some tension. A light purple glow surrounded her clit, massaging it with a soft, ethereal touch. Like the warmest, most wonderful breeze against her sensitive button. A similar spell targeted her wings, kneading and massaging the tensed-up pinions like only the most skilled hooves could. Oh, Celestia, that felt decadent. She sighed in pleasure, lowering her hoof tantalizingly toward her now-steaming nethers. The piece de resistance.

She quickly found her most favorite spots and her most favorite rhythm, guided by her own magic. With her hoof working her succulent folds and her magic handling everything else, she could think of no better description for the experience than heaven. Maybe she had been a little pent-up, the stress oozing from her body with every rub, knead, and schlick. Pants, gasps, moans. Oh, yes, she'd needed this, and finally, she had the opportunity to do it. It didn't hurt that it doubled as a way to bring Dash down to size. Thoughts of Rainbow Dash shrinking down, devastated that she'd lost to Twilight after bragging so much... even going so far as to admit she was wrong and beg for Twilight to teach her the art of self-pleasure. Those formed the core of her fantasies as she edged steadily toward her peak.

Then came the earthquake.

"Time's up!" Dash announced, plummeting to the ground somewhere behind her. The shaking earth broke Twilight's concentration, breaking her flow and shorting her magic at a critical point. If she didn't know better, she'd have sworn that was Dash's plan. From behind her, Dash snickered. "My turn."

A moist, foglike heat blew over Twilight's back as Dash got to work, the wet squelch of hoof against pussy magnified a hundredfold. Twilight tried to block that out as she refired her pleasure spells, sinking back into their magnificent touch. She tried not to think about Dash pleasuring herself behind her. How her engorged, throbbing clit had to be the size of Twilight's head, and her pulsing cunt big enough to swallow a pony like a snack. How much bigger she'd get if she'd won here, with nopony left to keep her growing desires in check...

Twilight stroked herself desperately, urging her body forward into orgasm, but it felt nowhere near as good as it had before. Where previously her ministrations had been for pleasure and victory, she was now petting herself out of fear. Fear that only seemed to grow as Dash's moans boomed louder and louder. Still, victory was in sight. The fantasy was no longer there, but her body responded to sheer stimulation. She had the headstart. She had the advantage. If she could only keep going, she would surely beat Dash over the finish line.

"How're you handling down there, Twi?" Dash asked, practically singing. "I'm doing great! I could have finished now, if I wanted, but there's no point in winning without a little — mm — challenge."

Twilight growled, eyes closed as she ignored Dash's egotistical, self-indulgent... bragging. Her eyes snapped open. Oh no. She could practically hear Dash stretching, smell the thickening heat of a growing pegasus' arousal. Sounds of dirt shifting roared around her as Dash's massive flank swelled into the earth, bulldozing everything in its path to make room. Dash sighed in contentment. She was clearly enjoying this so much more than Twilight was.

"Maybe you should learn to relax a little, Twilight." Dash's voice boomed even louder than before. Harder than ever to ignore. "You put a curse on me for a little friendly teasing, and what did that get you? I know what it got me. I'm already the biggest — unf — fastest — oh! — sexiest pony in all of Equestria." There was a rumble as the spell prepared to grant Dash her greatest growth spurt yet. Sunlight disappeared as Dash's titanic form loomed over her, the air boiling as her needy cunt radiated heat like a furnace. A shiver ran up Twilight's spine as something warm, wet, and sticky began pooling around her haunches. She dared not look back, but she could almost see the grin on Dash's face. "And — oh, fuck yes! — and... get this: I'm getting... even bigger."

The scream practically blew out her eardrums, and definitely shattered every window in Ponyville. Twilight turned around just in time to see Dash's spasming pussy, big enough to take a train whole, unleash a torrent of piping hot pegasus juice. There was no resisting the flood, the sticky slime carrying Twilight a ways before it finally ran out of momentum, leaving her gasping and spluttering in a pool of Dash's fluids. And Dash hadn't even seemed to notice. Oh, the humiliation.

"Too bad, too sad, Twi," Dash sang, getting up and dusting herself off. Where before she'd stood just barely taller than the market buildings, the new and improved Dash towered over them. It wouldn't be long soon before she could step on one like a soda can. "Guess that'll teach you not to curse your own friends. Although..." She stuck one of her massive hooves down, Twilight's soaked-through body peeling easily off the ground. "We still have plenty of time to hang out." She chuckled, sticking the exhausted Twilight to her carriage-sized cutie mark. "Why don't you stick around for a while?"

And as the titan-sized Dash trotted off — thankfully away from Ponyville — Twilight finally had a moment to catch her breath and reflect. There was nothing she could do about it now. The festival would have to be cancelled, her schedule would have to be put on hold. For the first time she felt... oddly free. Dash was still approaching the size of a mountain, and she was currently stuck to her flank in a humiliating position, but the spell would wear off sooner or later on its own. In the meantime, there was no thinking to do, no planning to coordinate... nothing but whatever Dash decided to do with her next. It was almost liberating, in a strange, sexual, giant-monster sort of way. She coughed, sputtering up the last of Dash's orgasm. "Rainbow Dash, where are we going, exactly?"

"My place," said Dash, the earth shaking with every heavy step. "You taught me a lot about bragging, Twilight, but I think I could still teach you a few more lessons about loosening up. You know I'm such a great coach, after all." Dash's hefty ass stretched even bigger under Twilight, shaking and rattling her against a mass of muscled flank. Enough to give her an upset stomach, but not nearly enough to unstick her.

She sighed. Oh well. To the victor went the spoils. Whatever happened next, whatever crazy scheme Dash had in store for her... she'd just have to think of it as a learning experience.