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Her New Role

by Ebony Horn

Chapter 3: Chapter Three

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Chapter Three

Dear Princess Celestia,

I hope you’re doing well. Things are mostly fine in Ponyville. I’m actually writing to you about a personal problem.

I’m afraid that I was rather unprepared for the physical changes that seem to have accompanied my coronation. The size, for example, has become fairly unwieldy. It makes me a bit uncomfortable to write this out, too, so I’ll just say that I’m not entirely sure how to deal with my new “equipment” either. It seems that all I can do these days is think about...well, sex. Sex and size.

I’m sure some other ponies would love that. But I just want some way to operate normally. I need to find some way to control myself, but right now, I’m at a loss. I would appreciate any advice or help you might be able to give me.

Sincerely,

Twilight Sparkle

“At least she’s stopped signing ‘Your Faithful Student,’” Celestia murmured. Then she moaned, softly, as something squeezed her chest.

Luna smiled innocently. A good six inches shorter than her sister, her “smaller” size put her about even with Celestia’s shoulder. She continued fondling Celestia’s bust, her arms stuck through Celestia’s and her own ample bust pressed tight to her sister’s back. Celestia opened her eyes and gave her sibling a knowing look.

“A letter from Twilight?” Luna asked. She kept massaging Celestia’s breasts. Once, when they were much younger, she’d been able to hold one in each hand. No more. Now, they overflowed her grasp, her palms pushing deep into their doughy width as her fingers worked Celestia’s titflesh. Luna swayed her hips gently, prodding her crotch against Celestia’s rear.

“Honestly, Luna.” Celestia smirked at her sister through the mirror. “Even foals can keep their hands to themselves.”

“But I haven’t properly said ‘good morning’ to you, yet.” Luna pouted, then smirked. Her right hand trailed down Celestia’s waist, then curved around her hips. Celestia’s butt cheeks squished and bounced against Luna’s crotch as Luna gave her generous flesh a squeeze. She let her hand drift a bit lower, lower still, until it was just barely brushing against—

“Later,” Celestia said. She frowned, glancing down at the letter hovering before her. “It would seem that poor Twilight isn’t growing easily into her new status.”

“Oh?” Luna asked. “How so?”

“Lack of control. It likely means that she’s holding herself back.”

“Back? She’s only a foot and a half shorter than me.”

“As you are now, Luna. But unrestrained—”

Luna thought about that. “Ah,” she said. She gave Celestia’s hips another squeeze.

“One does not grow into alicornhood easily,” Celestia murmured. She inhaled sharply as Luna’s wandering fingers found their way back to her crotch. “Goodness knows I have enough difficulties fitting into houses beyond the Palace. Twilight is suddenly dealing with a world much smaller than the one she grew up in.”

“Perhaps we can help her,” Luna said. “Provide some...persuasion.”

Celestia felt a warmth on her neck. She turned, took Luna’s lips in her own. She suckled hungrily on her sister’s lips, tasted her on her tongue.

When she pulled away, she was vaguely amused to realize that she was meeting Luna in the eyes. Usually eight-foot-six, it was rare that the younger Luna was of a height with her bigger, nine-foot-tall sister.

“Growing already, Lulu?” Celestia said. She turned back to the mirror and gently stroked her crotch. A thick, growing bulge lingered there. She shivered as her forearm brushed against one of her thimble-sized nipples, then stifled a moan as the bulge lurched. It was growing stiffer by the second.

“It would appear I’m not the only one.” Celestia did moan when Luna lightly nipped her on the shoulder, her wandering hands stroking Celestia’s growing erection. “Come, sister. We’ve done nothing since yesterday.

“Perhaps,” she added, a twinkle in her eye, “it might provide you with some inspiration as to how to help Twilight.”

With a sigh, Celestia smiled helplessly and turned to her sister. “But these were my favorite pajamas,” she murmured, once Luna had brushed her lips against hers once more.

“Were,” Luna said. “More can be made. And to be fair,” she said, smirking down at her sister from a height now four inches greater, “you’ve always liked outgrowing your clothes the most.”

Celestia sighed again, then grinned. “You know me too well,” she said. She placed her hands on Luna’s hips, her oversized bulge rubbing gently against Luna’s own, reached up for a third kiss—

—and let go.


Twilight was grumpy.

She’d woken up that morning to a case of morning wood and a nearly painfully full pair of nuts. Out of pure spite, or perhaps an unwillingness to allow her new size to dominate her, she’d refused to jerk off. She’d refused to empty her balls, and now, she was halfway to regretting it.

Before her ascension, she’d tried to make it a habit of going to the gym once a week, ostensibly to remove the little tire around her gut. She’d gotten it, she’d suspected, from eating one too many donuts on a studying fix. These days, she no longer needed it, but couldn’t see the harm in keeping up what was, undoubtedly, a good habit.

Twilight was just grateful to reach the gym with her clothes in one piece, and mostly unstained. She’d decided enough was enough and had wound up hitting the Big and Tall store in town. She’d left with a pair of workout pants meant for a pony a foot shorter than her, but with hips a good twelve inches wider. Good enough.

She’d attracted no shortage of attention on her way there. It turned out that when you were head and shoulders above everypony else, ponies tended to stare. By the time Twilight passed through the gym’s double doors, she was sick of double-takes, and sicker still of the triple-takes ponies made when they saw her bulge flapping obscenely against her thighs.

Thankfully, she was only an inch taller than when she’d gone to sleep the previous night. She almost laughed at the thought. “Only.” Seven-foot-four wasn’t a whole lot bigger than seven-foot-three. But given that she’d been an even seven-foot for a whole week before that, it seemed reasonable cause for concern.

At least she hadn’t had to duck to get through the gym’s doors. And at least she’d been able to fit through her bedroom door that morning (though she’d spent a good hour the previous day fixing up the damage she’d done to it two nights ago). Still, she wished she could see somepony who’d be able to see, at the very least, over her nipples.

She sighed as she made her way over to the free weights. She might be able to fit into one of the machines, but she didn’t want to test her luck. Still, she told herself, at least a good, hard workout might be what she needed to get her mind off things.

Twilight took up her position by a pair of wall-set mirrors. She’d grabbed a pair of weights from the rack, not really caring which ones. Most of them felt light to her anyway.

She decided she’d start with squats today. Once she’d stretched, she picked up a weight in either hand, positioned her feet around shoulder width apart, and started.

Keeping her knees out and her toes pointed, Twilight descended into her first squat. She kept her butt firm and did her best to keep her legs bending easily. Keep the weight on your feet, she told herself, not on your spine.

As she went down, she breathed in deeply. Her chest inflated impressively, her heavy breasts pulling forward and threatening to unbalance her. Frowning, Twilight rocked her weight back a bit so that she was leaning on her heels. That seemed to help, but pushed her rear even further up, leaving her big butt sticking out between her hips.

She let out a long groan as she went all the way down. She would’ve preferred to get her hips below her knees, but with all of the extra padding and muscle her thighs now had, the best she could manage was two or three inches above. Grunting and gripping her weights a little tighter, she slowly ascended into a standing position.

The next time she went down, some part of her noted something...off. Twilight glared at the bulge snaking down her pant leg, daring it to cause trouble. But, as full as her aching balls still felt, it didn’t seem like her stallionhood was interested in causing any disruptions right now. Privately thankful, Twilight began her next breath and descended again.

She nearly groaned. As her knees pushed out, she felt her thighs rubbing against one another, her supple flesh teasing against her hidden clit. Her butt ballooned out behind her; she could feel her new sweatpants clinging to her curves, suddenly feeling incredibly tight. As she went down, the bottoms of her buttcheeks folded over the tops of her thighs, her chunky assflesh compacting as she lowered herself further.

Gritting her teeth, Twilight brought herself back up. Once she’d made sure that nopony was looking, she briefly inspected her pants. They seemed fine...but they were certainly no looser than they’d been a minute ago.

Feeling slightly worried, she glanced at her reflection in the mirror. But her fears seemed unfounded; she was just about the same height she’d been when she’d started.

The next time she went down, her pants felt almost unbearably tight. She groaned under her breath, adjusting her posture as she got into a full squat. Closing her eyes, Twilight tried to clear her mind—and then moaned instead as she heard something rip.

Her eyes fluttered open. Twilight could feel her butt getting bigger, could feel her hips widening as she went even deeper into the squat. Out of the corner of her eye, she could see a small rip going down the side of her hip. It wasn’t large, but a healthy amount of purple flesh poked through.

Panicking, Twilight struggled to pull herself out of her squat, and nearly collapsed to the floor as a wave of pleasure washed over her mind. Her member throbbed against the tightness of her pants, her big rear pulling away more and more fabric as her body grew further into a pear shape. She felt it throb again and again, a mounting pressure growing at her crotch.

Letting out a muffled cry, Twilight held every muscle in her body taut. Then, slowly, once she was sure that her leg wasn’t going to explode into a flood of white, she carefully, cautiously, drew herself up out of her squat.

Though they’d been a bit tight before, her sweats now clung to her hips like a form-fitting sleeve. She rotated a few degrees and stared as her big butt wobbled. A few more rips had opened up along her rear, with even more of her supple assflesh poking out.

A red tinge colored her cheeks. “Right,” Twilight mumbled to herself. “No squats.” She inspected her pants. Upon assuring herself that she hadn’t made a mess of the mat below her—though she’d left a circular damp stain near the halfway point of her leg—she swallowed, then searched for a different exercise.

Arms! That was good. Little to no risk there. She just had to get some heavier weights. Wobbling slightly from the new weight of her rear, and very conscious of the way her thighs rubbed together as she walked, Twilight made her way back to the weight rack—only to realize what might happen to her pants if she attempted to bend over in her current state.

Then again, she decided quickly, her current weights should be fine. Taking a moment to inspect her form, she nodded and began her second workout.

It took all of thirty seconds for her to realize that each time her muscles flexed, bulging against the tension of the weights, they didn’t entirely un-flex. Instead, they kept some of their new size, getting a little bigger, a little harder, and a little stronger. By her tenth rep, it barely felt like she was holding anything at all. Worriedly, Twilight noted that her sleeves were straining to hold her arms in, and that small rips had started to emerge along the seams. She quickly dropped the weights.

So lifting was out. The chest press proved to be a bad idea, too; though her arms didn’t get any bigger, and her butt “only” squished out beneath her rump like a massive pillow, each pump of the dumbbell pushed her arms a little further away. That was when she realized that something else was pushing them up: Her breasts had been steadily swelling with each rep. In what seemed like no time at all, they were pushing against her forearms, straining mightily against her training bra. Twilight could barely see over her top. Gritting her teeth, she set the barbell in place and sat up, her now watermelon-sized breasts bouncing happily against her chest.

For goodness’ sake; was there anything she could do that didn’t make her any bigger? Twilight groaned as the bulge in her pants throbbed. Her erection had been growing stiffer throughout her entire workout. She’d been able to feel her balls filling up with seed all morning, growing fuller and fuller without any release. They ached to release their sloshing contents; she could feel them pressing against the insides of her thighs, dropping almost down to her knees by now, plump and heavy and full.

She couldn’t take care of that now. She wouldn’t allow herself to. Damn it, but she would finish a workout today! She wouldn’t let this stop her.

Grimacing, Twilight got to her feet. Just that one simple motion set her boobs and butt jiggling madly. Twilight just sighed.

After scanning the rest of the gym, her eyes settled on the treadmill. Perfect. Heavier mares than her used those to work out—though most of their size was in different places—and she couldn’t think of any particular muscle group that should be affected by a quick bit of cardio. She could probably stand to burn some fat anyway.

Twilight set herself up on a treadmill at the far end of the row. Deciding to start off easy, she kept the resistance low and set herself off at a low speed. Going with the treadmill, she started to jog.

At first, everything seemed fine. Twilight smiled to herself, then wiped away a bead of sweat from her forehead. This was great. She was getting her workout at last.

But she’d neglected to account for one thing: the friction of her newly tight pants against her crotch—or, more accurately, against her entire leg.

Every time Twilight pulled her right leg back, the same butt cheek bulged out, pulling a good amount of fabric with it. As the bottom of her cheek slid across the side of the other, her pant leg tightened around her left side. As it so happened, that was the same leg she’d “adjusted” her stiffening member into. Now, each time her leg pulled back, it pulled the pants’ fabric across her shaft, the soft material sliding comfortably across her flare and squeezing her shaft tight.

Twilight gasped lightly as the treadmill started to pick up the pace. Her faster jog pushed her into a more uncomfortable position. Her chunky thighs slid past one another around twice a second, constantly rubbing and stimulating her growing bulge.

Because it was, actually, growing. Twilight let out a strangled groan as it throbbed, then swelled until it stretched past her pant leg. Twilight was forced to keep her left leg uncomfortably straight for fear of stimulating herself further any time she bent her knee back. Unfortunately, all that did was provide an easier route for her tool to grow, inching its way down toward her shins as the pressure built in her plump, heavy balls.

The taut fabric at her crotch clung to her bulging nutsack, massaging them, teasing them with every step. Twilight stifled a moan as her cockhead flared, spurting a few ropes of precum onto her ankle. They drooled out of her pant leg, her meat steadily leaking more pre by the second than most stallions could provide in a full load.

Twilight soon found herself struggling against thoughts of lust. The poor mare was powerless, stuck between her own stubborn pride and mounting arousal, as her big body’s every movement just drove her even more crazy. Soon, the bulge in her pants resembled nothing less than a third leg, and her crotch felt ready to burst. Grunting, whimpering, Twilight frantically searched for the treadmill’s “off” button.

The instant she pressed it, she dashed off for the locker room. Her fat bulge, perfectly outlined by her tight pants, flopped from side to side as she threw herself through the door, crammed herself into a toilet stall, and slammed the door shut.

It took less than a second for her to tug her pants down over her hips, as figure-hugging as they were. Twilight Sparkle was desperate. The second she had her stallionhood free, she steadied herself against the wall, closed her eyes, and released.

She cried out, her hips jerking wildly, as she unleashed load after load of hot, thick cum into the bowl. Her legs shook, her eyes squeezed shut, and her balls smacked against her thighs as they unloaded an impossible amount of her seed. Soon, the bowl was overflowing with her jizz; soon after that, it was dripping down onto the floor, a lake of Twilight’s thick, creamy baby batter spreading out to cover the floor.

Her chest heaving, and sweat dripping down her cheeks, Twilight let out a long, shuddering sigh. She balled her hands into fists and gritted her teeth. Then, her shoulders slumping, she heaved her pants up over her softening, dripping stallionhood before awkwardly edging her way out of the stall.

She pitied the poor janitor who had to clean up her mess. But right now, all she cared about was finding a (private) shower. And from the looks of it, none of the shower stalls here would have any hope of fitting her.

So, refusing to make eye contact with anypony she passed, Twilight made her way out of the gym. She had a long walk home. She just hoped it would be an uneventful one.


It wasn’t.

Twilight all but slunk back to her home. Admittedly, her larger form (she had to be nearing seven and a half feet by now) made “sneaking” difficult, but she did her best. At the very least, she kept her eyes stapled to the ground, watching her feet make long, efficient strides as she made her way home.

All went well—for about three minutes.

“Hey, Twilight!”

Twilight recognized the voice instantly and decided to pretend to ignore it. She could already feel herself chubbing up again, and she did not want to get home a second later than she could help it.

“Twilight!” Hoofsteps behind her. Twilight walked a little more briskly, her long legs taking her about as fast as a smaller mare’s jog.

“Hey!” Twilight winced as Rainbow Dash ran up beside her before settling into a more moderate trot. “What, you going deaf or something?”

Twilight sighed and stopped. “Something like that,” she said.

“Just saw you walking and thought I’d say hi.” Dash smirked up at Twilight. She eyed the bigger mare’s clothes meaningfully. “Going to the gym, huh?”

“Leaving, actually,” Twilight said, hoping that Dash would get the hint. “I was just heading home.”

She didn’t. With standard RD tact, she happily barrelled through Twilight’s subtlety with all the care of a rampaging bull. “Oh, cool,” Dash said. “I always love going to the gym. You get a good burn going?”

Twilight thought of her struggle on the treadmill. “Something like that,” she said again.

“Awesome.” Twilight stared; had Dash just winked at her? “Not that you need it or anything.”

Swat.

Twilight swallowed her gasp. Had Rainbow just—

No. There was no way. But—

Dash pulled her hand back from Twilight’s behind and winked again. “Heck, Twi. I know some mares who’d kill for your definition. I mean—“

Twilight heard none of it. She was too busy coming to terms with the fact that Rainbow Dash had just slapped her ass. Rainbow Dash had just slapped her ass. Her ass.

Her big, wobbling, growing ass.

Oh no.

She’d stopped her squats midway through a spurt, and had let all that tension and growth taper off, simmering just under the surface. But Rainbow’s slap—dirty-minded or not—had set the growth free. Twilight bit her lip, her eyes darting behind her as she watched her rear and hips begin to balloon out. Her already skin-tight sweatpants stretched even further, becoming paper-thin. She could see her flanks wobbling prodigiously from where Rainbow had slapped her, bouncing and jiggling happily, as though they had no intention of ever stopping.

And for all she knew, they really didn’t.

“Sorry,” Twilight blurted. She heard something rip as she pushed past a confused-looking Rainbow Dash. “Gotta go. See you—“

Rip. Several threads popped around the bottom of her butt, where her heavy butt cheek met the top of her thigh.

“—sometime!” she finished, panicking and breaking into a run. She could already feel her stallionhood stirring, stiffening to its full, massive length and stretching her pants even further, up to and past their breaking point—

Her meat and potatoes slapped loudly against her thighs as she ran, the impossibly tight fabric little more than a glove around her stallionhood. She gritted her teeth, tears coming to her eyes as she struggled against her huge, oncoming load.

I have to hold this, she told herself. She could already feel her spine lengthening, her whole body readying itself for growth as her left butt cheek sheared through her pants entirely. I can make it inside. I’m going to make it—

She didn’t make it. Not thirty feet from her front doorstep, her foot caught on a pebble in the path. Twilight let out a cry and found herself flung forward onto her knees. Her pants all but exploded off of her, and she followed after, exploding in size as her member reached its full length and then kept going, growing huger and huger and heavier against her crotch—

Twilight felt her hips jerking wildly, her body heaving completely independently of her will as she went into a growth overdrive. Her cock flared up, higher and higher until it towered above her body, even as her kneeling body nearly reached her bedroom window, her whole figure convulsing with the force of her oncoming orgasm—

When she finally came to, she was lying prone on the ground, her clothes in tatters around her. Twilight groaned, shifted her weight. Her deflated member dragged on the ground, pinned between the dirt and her ankle. As she picked herself up, she noticed what she’d been aiming at: the neighbor’s house, a nice little pink cottage, had been right in the blast zone. It had been absolutely drenched in a thick, creamy white.

“Well,” she grunted, staggering toward her front door. “I hope things can’t get any worse.”

She was pleasantly surprised, then, when a blushing and slightly surprised Spike greeted her at the door. She had a letter.

A reply from Princess Celestia. Next Chapter: Chapter Four Estimated time remaining: 21 Minutes

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Her New Role

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