“Welcome to Carousel Boutique, where… hmm?” Rarity paused, looking around the empty store and the still faintly swaying bell over the door. “I guess they changed their mind.”

She shrugged and turned around to go back to her work room, sighing as she spotted her absolutely ruined dress from the night before. She’d assured Discord’s… friend, that there were no hard feelings, and she hadn’t lied when she told them that she had more than enough gemstones in storage to replace the paltry dozen the blob of sentient ooze had eaten, but at the time she hadn’t quite realized just how gunked up and stained the fabric had been. Or more likely she’d just tried to actively ignore it.

“I suppose if nothing else, I will be positively swamped with commissions these coming weeks.” She shuddered as she thought back to all the fancy and expensive dresses that must have been lost during the shenanigans of last night. Ponies didn’t come to the Grand Galloping Gala in anything but their best, and most of them would now have to replace that best. Perhaps she should advertise some sort of discount for replacements like those and trade some of the profit for the boost in reputation. Then again, most ponies of that social strata could certainly afford full price. Decisions, decisions…

She paused in the middle of a line of stitches, ear twitching as she turned off the sewing machine. Just like she’d thought, there was some strange thick gurgling sound somewhere in the house. “Sweetie Belle? Are you making toast again? I thought I told you to stay out of-” She froze as something brushed against her tail, still leaning over the workbench. “What-?”

Before she could so much as turn her head, something suddenly jumped at her flanks, something thick and goopy latching onto them.

“GYAAAAAAH!” Rarity shrieked and bucked her hips, only for her legs to buckle as whatever had attacked her started to force itself between her flanks, pushing in deeper and deeper. She gripped the desk for dear life, nearly falling down when the goop found the other entry between her legs and began to push and pump into that one as well.

“L-let go of me!” Rarity pushed herself up, trembling and shaking to keep standing as she slowly turned her head to look over her shoulder. “Whoever you- glllmf?!”

Her eyes widened as her attacker immediately surged forward, now covering most of her body as well as her muzzle as it started to shove itself down her throat. She thought she saw some glimpses of a top hat and a bowtie in between waves and surges of lime green, but her head was getting fuzzy the more of that strange goop pumped into her, thoughts feeling like they were moving through molasses and sticking together. Her eyes rolled up as her pupils began to change to a green color, her last thoughts drowned under the rising tide of goo.

~~~~~

Rarity groaned softly as she pushed herself up from the floor, trying to remember how she’d ended up there in the first place. She’d been working on a new dress to replace the one from last night and…

She perked up as that train of thought reminded her of something else, head turning back and forth until she spotted the small box sitting on the floor next to her desk. She giggled and started to drool as she stared at the box full of quality gemstones just waiting to be stitched onto dresses. Surely she could spare one as a little snack. Or maybe two.

Quick as a blink she’d grabbed a whole hoofful of gems and stuffed them into her mouth, moaning happily as they melted on her tongue. Her stomach rumbled and glorped, reminding her of another odd feeling she’d woken up with aside from her sudden peckishness.

Walking over to the full-sized mirror she used to try her new dresses, she giggled as she saw her reflection, posing proudly to inspect her body from all sides. Her stomach was round and heavy, pressing against all four of her legs when she stood and nearly touching the ground, sloshing and swaying every time she moved. Her flanks were similarly big and round, squishing softly inward when she pressed her hoof against them and jiggling delightfully as soon as she let go. Green drool was dripping down her chin and out of her ears, adding tastefully to the patches of green goo already sticking to her fur and mane in random spots, and her pupils were a healthy lime green and practically glowing as she appreciated her reflection. The darling little top hat and bowtie she was wearing only helped to add an air of distinction to her natural elegance.

“Oh my, I might have to redo my measurements before I start on any new dresses for myself.” Rarity giggled drunkenly, posing some more and rubbing her stomach as her magic occasionally floated over more gems to treat herself. She only stopped when the box was empty, pouting at the lack of treats.

The store bell jingling made her perk up, taking a step towards the door before stopping herself. She turned to the mirror again and focused, the patches of goo all over her body shivering and slowly moving towards the nearest opening to slurp back into her body, leaving her fur coat and her mane and tail immaculate. Her stomach and flanks gurgled and wobbled before gradually shrinking, leaving her looking slim and svelte again. She took off her hat and bow tie, hanging them to a corner of the mirror for safekeeping, then pranced away towards the store area.

Inside the store her friend Twilight was waiting, smiling at her as Rarity walked out of the back. “Good morning, Rarity! I wanted to check on you and see how you were doing after all that chaos at the Gala last night.”

“Oh, Twilight! Thank you, darling, but I am doing quite fine. Better than fine, even.” Rarity smiled back, joining her friend on the other side of the counter.

“That’s good to hear. After all that trouble with Discord’s friend, I was a bit worried how you were holding up.”

“Well, I won’t pretend like it didn’t give me a bit of trouble, but it’s all goo under the bridge. If anything, I imagine it’s certainly going to lead to a spike in commissions.” Rarity hummed and perked up. “Oh, that reminds me! Do you think I could borrow Spike again a few times to help me look for more gems?”

“Didn’t you get a lode of gems just last week?” Twilight frowned, thinking. “I was hoping to have him help me with a new delivery of books, actually. I suppose I could spare him for a few- mmmmf?!” Twilight turned her head to see Rarity right in front of her, her eyes going wide as her friend pulled her in and pressed their lips together. Something thick gushed into her mouth, flowing down her throat before moving back up.

The kiss finally broke and Twilight stumbled back, head swimming. “W-what was… Rarity? What did you-?”

“I was just thanking you for being such a good friend and letting me borrow Spike.” Rarity giggled drunkenly, sitting down and leaning back. “But if you’re that confused, I guess I’ll have to thank you more properly.”

“Wha…?” Twilight stared dumbly at her friend, taking in the massive jiggling belly she was hiding behind, the small bit of green drool on her lips and the bright green cock that was growing out from between her legs, pushing against her stomach and making it jiggle. “I-I don’t… Rarity, what happened to-?” She froze, mouth hanging open as she lost her train of thought and her pupils gained a faint green tinge. Her legs slowly started to move forward, taking her towards Rarity as she licked her lips and nodded distractedly, mumbling. “Thank me… more properly, y-yeah…”

Rarity moaned as Twilight started to climb over her belly, squishing and squeezing it under her hooves and the weight of her body. She let herself flop down onto her back, giggling as Twilight let out a surprised squeak and moaning as the alicorn sunk deeper and deeper into her, Rarity’s belly jiggling and squishing around her legs and her barrel until both mares were muzzle to muzzle again.

Twilight blinked in surprise, blushing as she stared into Rarity’s green eyes for a few seconds before slowly leaning forward… only to yelp and moan as Rarity’s big goopy cock pushed itself between her legs from behind. Her second moan was muffled when Rarity pulled her forward into another kiss, this one deeper and with a tongue that pushed all the way Twilight’s throat, making her eyes roll up as she gulped and swallowed around it, any thoughts she had about the situation drowning in goo.

The two mares stayed like that for minutes, Twilight bouncing and moaning while Rarity jiggled and sloshed on the floor of the boutique. Eventually Rarity pulled Twilight in even closer, the alicorn barely visible as she sank deep enough into her friend’s belly to bottom out on Rarity’s cock, both of them moaning loudly against each other’s lips as the cock visibly bulged. Twilight’s form slowly reappeared as she was filled with goo, the cock itself slurping up her pussy to fill her flanks and her stomach.

Finally Twilight pulled herself away from her friend, moaning and giggling drunkenly as she rolled off of Rarity’s belly to land on the floor next to her, her belly and flanks jiggling and sloshing. She stayed that way for another few minutes, rubbing and squishing her hooves into her belly until both mares slowly got back to her hooves.

“R-right, I’ll… I’ll uhm, I’ll let Spike know that he’s excused from chores for the day if he helps you with some more gem digging. O-or maybe for the week.” Twilight hiccuped, giggling as her stomach gurgled and sloshed and slowly shrunk in on itself.

“I’ll be sure to set a box aside for you, darling~” Rarity giggled as well, swaying a bit on her hooves as her own form pulled itself back to her small, inconspicuous size. She shuffled forward to give her friend another kiss for the way, their tongues playing around each other and pushing down each other’s throats for several moments before they pulled back again.

“Thank you, Rarity. I can’t wait.” Twilight licked her lips at the thought, daydreaming about those gems as she stepped out of the boutique and slowly made her way back to the castle. Spike was going to come back from his outing with Rarity with a whole haul of gems, so he probably wouldn’t miss a few if she snuck some snacks from his stash, right?

Author's Note

Another one that was a lot of fun to write.

Tomorrow's chapter will probably be on the shorter side since I don't really have any strong ideas for the prompt ("Pheromones"). I'm open to suggestions, but unless one of those suggestions really inspires me I will probably stick with the short idea I have and use the saved time to focus on Tuesday's prompt which I do have plans for.