Envy is Magic

Sweetie Belle spun around in front of the mirror, giggling to herself. About two or so hours ago she had rushed upstairs to her room in Carousel Boutique and locked the door, immediately jumping into her bed and spending that time furiously masturbating. It felt so good to have big, soft breasts to squeeze, to have big, sensitive nipples to twist and pull that it was almost like discovering masturbation for the first time.

Once she had satisfied herself, Sweetie ran a warm bath to shampoo and clean herself up from the earlier laborious task she’d participated in. Now she had thrown on her silk pajama button up top and bottom and they were so ill-fitting it was comical. The former loose pants looked painted on, the ends of them stretched to fit around her calves as tightly as the waistband was around her hips. Three of the buttons on the front had popped off dramatically the minute she exhaled after a short battle of putting them on, revealing her large, creamy white breasts. Each sleeve was tighter than tight on her arms. To think a thirteen inches made this much difference.

Sweetie had also intended to wear her sisters bra but that was no longer possible, as her new EE cups outmatched her sisters DD.

The sound of hoofalls thumping up the stairs caught Sweetie’s ear as she was slipping out of her busted nightwear.

“Sweetie Belle!” Rarity's airy voice rang out, “You need to lock the door when you’re here and I’m absent. Anypony can just waltz right in.”

Sweetie Belle smacked her forehead. So much for subtlety.

“I’m just stopping in to for a snack before I head back out,” she continued, her hoofsteps idly clopping into the kitchenette.

“Okay!” Sweetie replied, looking around her room for clothes. She couldn’t rummage through Rarity’s things now as she intended so she had to make do with her own. That and she had no bras in this place to fit her unless she ran downstairs to raid the lingerie rack (also out of the question). Sweetie Belle settled on pulling over a black patterned V-neck shirt with colorful triangles on it.. It stretched across her bigger, broader chest so dramatically the word was nigh unreadable, the hem resting midway up her abs. At least it contained her big breasts.

Sweetie slipped on the blue pair of brightly colored shorts and winced at how tight it was. Not only did it fail to reach her hips (revealing the top of her muscular ass) but it also outline every juicy contour that a well fitting pair of shorts would hide. Nothing was left to imagination.

But she didn’t really care. What she cared about was showing off her new body to her sister. Seeing how she’d react. Sweetie opened her bedroom door and walked into the kitchen.

“I hope you can excuse me for doing a grab and go, so to speak, but I haven’t much time to meet with this client tonite so I cannot chit-chat,” Rarity was dressed in a black pencil skirt with a white top, her red bathing suit quite visible beneath the fabric. She was busily digging through her fancy purse to put away the granola bars.

Sweetie Belle stood in the doorway, not yet noticed. But she would be. Sweetie walked over, hooves clacking against the white tile. “Well… if you can’t fit them all in your purse I’ll have one right now. I’m really hungry.”

Rarity glanced at Sweetie for a split second and continued organizing her purse. “Darling, what did I tell you about wearing my heels. They don’t fit your hooves. You’re going to lose your balance and fall. Come now, slip them off.”

“I’m not wearing heels,” Sweetie Belle said innocently, standing straight.

“Don’t be ridicu-” began Rarity, biting her tongue and looking at Sweetie Belle. Really looking at her. UP at her about an inch. Then down. The cute, smiling face, the enlarged bosom, the firm midsection all the way down to… her rather large, sturdy hooves.

“What’s this?” Rarity did a double-take, and then magically unlatched the straps to her heels. She stepped out and descended three inches, her eyes now level with her younger sisters clavicle.

“I had a growth spurt!” Sweetie Belle said, absolutely relishing that she could look down at her formerly big sister in and out of heels. “I’m taller than you are!”

“Not just taller,” Rarity said, a hint of shock in her voice as her eyes traveled over Sweetie’s bust and muscles. “I’ve never heard of such a growth spurt. You’re a foot taller than me AND stronger to boot?”

“Sexier too,” teased Sweetie Belle, reaching her hands to caress her big breasts. “Oh, I tried borrowing one of your brassiere’s but the cups simply can’t contain my fruitful new bosom.” She said, imitating Rarity’s tone and inflection.

“Well now,” Rarity’s face turned scarlet, realizing the latter was obviously true. “I would have LIKE to offer you some of my outdated clothes to borrow were you able to fit but clearly you are-”

“A cut above your body,” Sweetie Belle finished, right as a powerful stab of pleasure drilled into her skull. “Just a little more,” she bit her lip, nipples hardening through her T-shirt.

“Hmph,” Rarity was already strapping back into her shoes and shouldering her purse. “Maybe when you adjust your attitude I might help you with your rather dismal clothing situation. I have to be off. Good-bye!”

Rarity stormed off and down the stairs muttering additional misgivings but Sweetie Belle didn’t care. That fierce shot of envy was building into her core so strongly that Sweetie had doubled over from the sheer amount of power it was preparing to unleash.

“OHHHHHH YEESSS” Sweetie Belle hissed as the magic exploded within her body. The inches flew by as Sweetie lurched up six-foot three in one powerful surge. The EE cup breasts in her shirt ballooned two sizes and tore their way out in a phenomenal display of mounting fertility. Her abs hardened further, the already dense muscle rippling with newfound strength, and her elastic shorts stretched into no more than feeble panties as her hips widened and her thighs bulged their way into a size that rivaled the Princesses themselves. Her arms flung out and she flexed them, hard balls of muscle the size of oranges swelling up and steadily growing larger and larger.

“YES!” Sweetie Belle grasped at her breasts, going bow legged right again at the verge of orgasm. She brought one of her fat nipple to her mouth and suckled, another finger caressing her spasming pussy to bring her over that edge into her seventh orgasm of the day. She bucked the air, moaning with delight into her dark nipple as her juices splashed out onto the floor.

A bigger, buffer, worn out Sweetie Belle breathed a sigh of relief when it finally ended, and all six-foot eight of her collapsed into the kitchen chair, the pegs creaking under her weight. That was the single biggest spurt yet. And with only a few seconds of teasing. Sweetie tore off the remains of her shirt and tossed it to the floor. What she needed was to be bigger. The biggest, buffest, sexiest mare in this entire country. If she could get to Rarity again sure, but now she was gone and there wasn’t anyone in mind to coerce jealousy from.

The sun was going down and Sweetie Belle felt the urge to go for a walk and show off her new body. At this height she would be impossible to miss. She stretched, absolutely loving that her fingers were borderline touching the ceiling of the small kitchenette and casually strolled downstairs to help herself to whatever was on display.

About 20 minutes later Sweetie Belle hit the streets. Some light browsing downstairs found her not many fitting designs, but there were a few exceptional pieces that were created for taller mares. Sweetie was wearing a strapless little black dress with a swooping neckline that her mountainous white cleavage was practically bursting out of. The stretchy choker around her neck accentuated her upper body wonderfully and brought an extra bit of sensuality to the garment. The back of the dress was open and exposed her rippling muscles all the way down to the base of her tail. Whenever she turned her head of course, as her long hair fell to mid-back.

Her flared hips ate up the rest of the space leaving the bottom half of her cutie marks exposed to juuust the upper thigh. Anyone who was looking would be able to catch a glimpse of her jet-black panties. None of the heels fit but Sweetie was both tall enough where it didn’t matter and had also painted her smooth white hooves jet black to complement her dress. She looked like a powerful amazon on the way to the Gala.

Sweetie was garning no short of attention, between the catcalls and long, quiet stares from mares and then receiving lustful glances from stallions and brief, hot flashes of envy from the mares they were accompanying on dates. Each one was a brief kiss to the base of her skull and while at first the extra centimeter here and there felt nice she didn’t want to burst out of her dress in public.

At least not yet.

Sweetie Belle caught her upper body in a window and had to laugh. No wonder she was getting more attention as the night went on. Her dark areola was peeking out a little from her dress. Not only that but both her nipples were stiff and at attention thanks to the jealous mares about. Any bigger and she’d be stuffing these big breasts into a dress that could no longer hope to contain them. She wiggled her tush at a stallion who she just noticed was gawking at her from an outdoor table and sashayed back towards the Boutique.

Two blocks away on a more secluded side street she stopped yet again to admire herself in a larger window. At this point she had to stuff her breasts down. They had both flopped out.

“Excuse! Miss! One moment please!” a heavily accented voice called out.

Sweetie wheeled around and looked down to see Photo Finish running up to you.

“Please… I, PHOTO FINISH, must be speaking to you,” panted the shorter mare, putting up her index finger as she caught her breath. “Another… moment. If you can spare.”

Sweetie Belle placed one hand on her hip and thrust her muscled leg out. She wondered if Photo Finish would recognize her as the same scrawny sprout from a few days ago.

“Excuse me once more, you have much longer stride,” Photo Finish pulled out her camera and snapped two pictures of Sweetie Belle. “Wonderful natural pose! Did not even find need to ask!”

“Hey!” Sweetie Belle crossed her arms and raised an eyebrow, only to be inundated with more flashes. “Alright, what do you want Miss Finish?”

“You! Modeling for ME!” Photo Finish pulled a folded up sheet from within her vest and unraveled it. “Bulimic. OUT! Buff, is in!” She stabbed at a sketch of an athletic mare posing in a very wild looking outfit. “You miss, are the PERRRFECT example of the kind of body I want wearing my new line of outfits! Big! Brawny! Beautiful! Busty! You are perfection incarnate!”

Sweetie Belle practically melted at the pitch. This was never quite her dream but here was a golden ticket being handed on a silver platter. A ticket she KNEW her sister had chased years ago.

“In weeks I will have you strutting your stuff everywhere!” Photo Finish drawled on, continuing to woo the six-foot ten mare in front of her. “Every billboard, every magazine! You will be the shining spearhead of next big fashion and body trend!” A quill was suddenly in Sweetie’s hand, as was a written contract.

“I already sign earlier. You just scribe and we begin tomorrow!”

Sweetie Belle pressed the quill tip to the page. “No backsies?”

“Is binding on both ends. I shan’t not be able to drop you,” said Photo Finish, spinning around and motioning to her back. “Sign!”

One hastily scrawled signature later and Sweetie Belle was the next big thing in fashion.

“Magnificent!” said Photo Finish, wheeling around and stuffing the contract into her purse. “I meet with in the morning. Here! This pastry shop!” She pointed to the store next to her. “Now! I go!”

And just like that she had zipped away, her blue mane whipping behind her as she turned the corner. Nearly bumping into a couple of mares who had been standing at a distance watching her.

“What the heck was that about?” said Diamond Tiara in a huff. “Was she talking to who I think that it?”

Silver Spoon cleaned her glasses and put them on. “I think that’s… Sweetie Belle?” she said slowly. The sun had gone down and it was hard to see.

“Let’s go Silver,” commanded Diamond Tiara, rushing over.

Sweetie Belle stood there lost in the fantasy of her bountiful future. She was going to be a famous model. THE famous model of an upcoming fashion age spearheaded by a legend.

“Hey! Sweetie! What the hay was THAT about with Photo Finish? Why would she be talking to you….” Diamond Tiara slowed her roll, eyes catching up to the new, amazonian Sweetie Belle. “What happened to you?”

“Oh me?” Sweetie Belle snapped out of her fantasy. “I had an insane growth spurt and now I’m bigger and bustier than you two total jerks could ever be.”

“Wha-” Diamond Tiara seethed, “Excuse yourself! You’re just a… a-”

“I just signed a deal with Photo Finish to become Equestrias next top model,” Sweetie Belle pretended to inspect her fingernails for dirt. “I’m going to be the biggest thing in Equestria.”

“Bull!” interjected Silver Spoon. “There’s no way she’d sign somebody that... Looks like you! Because models don’t look like that!”

“Well, you’re not exactly the expert on looking at things are you, four-eyes,” Sweetie Belle goaded, planting her hands against her hips. “Bulimic is out, buff is in. And you two string-beans don’t amount to anything in the eyes of Photo Finish. That’s why I just got signed to a major modeling contract and SHE just walked past you two like a couple of nobodies.”

Diamond Tiara scowled and her head spun around, putting two and two together despite her attempt to interpret in a way that wasn’t true. “Photo Finish… and you?”

“YES!” Sweetie Belle could feel the delicious jealousy hammer down the length of her horn and right into her pleasure center. It was already so much stronger than ever before. And she wasn’t done yet. “Yes! I’m the next big thing in Equestria!”

“Juh- Just so you know, my daddy can get me a modeling gig twice as better as whatever Photo Finish duped you into,” Diamond Tiara flushed red, failing to not stare up at the pair of big creamy breasts jutting out above her.

Sweetie Belle crooned. “Ohhh your daddy could throw all the bits in Equestria at Photo Finish and she’d still turn her nose up at you. You saw it. Face it. Your skinny little rump is headed for obscurity and I’m headed for fame and fortune.”

Diamond Tiara fumed as Sweetie Belle’s body subtly shuddered in uncontrollable anticipation.

“C’mon DT let’s just go,” Silver Spoon tapped her friends shoulder and motioned with her head down the street. “We don’t need to compare ourselves to her.”

“Why not?!” Sweetie Belle all but gasped, the fur on the back of her neck spiking. Any second now she was going to explode. “You’ve done it to me for years! I’ve been doing it for the past minute and we already know I’m officially better than the both of you put together.” Sweetie Belle fought the desire to just outright fondle herself. “Are you sure you don’t want any more reminders right now? Because that’s all you’re going to get when my face is everywhere. Because I’m going to be huge. I’m going to be the envy of Equestria!”

Diamond Tiara’s eyes practically bulged out of her head but Silver pulled her away before she could say anything. The two mare’s marched away back down the street towards wherever they originally were heading.

Sweetie Belle staggered against the fence bordering the outdoor restaurant seating area like a mare on the verge of collapse. The coiling pressure that had built up her body hit the boiling point and finally released.

The tight black dress clinging to Sweetie’s body all but exploded around her expanding body. Giant tears creased the dainty fabric in long horizontal gashes, revealing inches of creamy white coat to the night air. Loud rips served as a backdrop to her long drawn out moan of her orgasmic whine, her body shooting up several inches at a time. Sweetie hit seven feet tall almost instantly and rocketed right past it in fitful spurts. Her bust flopped out and swelled to a cup size that easily surpassed Celestia, and her ass more than matched even Luna’s most prestigious booty. Her panties snapped and dropped to the ground, useless, as her pussy spasmed and gushed hot juices onto the grass. Sweetie Belle plunged a finger into her desperate snatch, riding the ecstasy of her orgasm past eight feet and growing.

Finally, a sweaty, panting, statuesque eight-foot four Sweetie Belle came down from her orgasm. She had gripped the small iron fence so tight there were the slightest of finger indentations in the metal. Sweetie’s head was bent downwards, and she could see through a small gap of her fluffy mane that several ponies had formed a small perimeter around where she stood. Some were shocked. Others had their hands in their pockets and staring in lustful awe at the sexy feminine powerhouse that just ascended before their eyes.

Sweetie Belle flipped her mane out of her eyes and stood up straight and proud, wiping the sweat from her forehead. She didn’t quite care if they could see her naked. In fact she preferred it. Let them get a look at her big, beautiful body. In days she’d be everywhere anyway. On everyone’s eyes. Sweetie stroke a sexy pose and tossed her mane, relishing her newfound vantage point heads above the normal sized crowd. She winked at young stallion and spun around, strutting nude back to The Carousel Boutique.