Revenge Is a Dish Best Served Blue

by SunniesStories

Rating: mature
Tags: Original Character, My Little Pony: Friendship is Magic, Fetish, Porn, Sex
Length: 2815

Cinderheart visits the Blue Bee Diner and drinks a milkshake with some unexpected results

When Cinderheart was invited to come over to the Blue Bee, she was expecting to catch up with an old friend over some milkshakes and tea.

Unfortunately for her, Sunnie Bun hasn’t quite forgotten the last time Cinder brewed her some ‘special’ tea.

Revenge, as they say, is a dish best served blue.

*Content warning: contains blueberry inflation, sex, etc. My first time attempting blueberry too*

Gift story for Cinderheart, who gave me some excellent editing help with this one

Published 2024-03-17 02:10:00 UTC
Last updated 2024-03-17 02:10:00 UTC

Revenge Is a Dish Best Served Blue

The front door of the Blue Bee jingled happily as it opened. Sunnie looked up from her novel, a cheap romance book she only read when it got super slow, as it was on Sundays. The book was immediately forgotten when she saw the pony who walked through the door.

“Cinder!” Sunnie leapt the counter and smothered her friend in a hug. “So you did get my letter! I’m sorry I haven’t visited in a while, things got in the way.” Cinderheart hugged Sunnie back and smiled.

“Of course I did, and no worries. I’m here now.” Her eyes scanned the Bee, settling back on Sunnie. “I see you’re doing well for yourself.” After another quick hug, Sunnie waved Cinder to one of the booths that ran along the wall.

“Sit! Sit! I’ll make you up something special.” The Blue Bee was soon filled with the sound of a blender’s whir. Cinder got comfy in her seat, letting her saddlebag fall, and stretching a little. Sunnie came back a few moments later, with two tall milkshakes and a large sundae, which she placed on the table with a flourish. “Sorry for the wait! We’re testing a new recipe out, getting the mix just right is a bit tricky.” Sunnie’s smile turned mischievous. “Blueberries are surprisingly difficult to work with sometimes.”

“I know that all too well.” Cinder replied, eyeing the blue milkshakes and sundae. “Your letter didn’t mention ice cream being offered here.”

Sunnie sighed.

“Yeah, it’s new. I, uh, kinda demolished a competitor's store, and to help them rebuild, they’ve been operating out of the Blue Bee. Velvet’s helping them pick out the building supplies today, otherwise she would have loved to meet you.” Cinder’s eyebrow went up a little.

“How’d you manage to destroy an entire store? I know you’re clumsy and all.” Sunnie blushed.

“It’s Vel’s fault. She sees any other milkshake place that pops up as a threat, and she wanted me to drink and eat their entire stock. Then we, uh, both lost control. I cleared them out then, well, you know how I can get.” She smiled sheepishly, taking a sip of her milkshake. “Oooh, that hits the spot! I think I finally got the mixture down pat!” Cinderheart took a sip of hers as well, and sighed happily. The cool shake was perfect for such a hot summer day, and the flavour was exquisite, rich, farm-fresh blueberries chased with something else lurking just below the surface that tickled her taste buds. Vanilla, perhaps? She gulped down the mouthful, the shake smooth and thick.

“I needed this.” Cinder said, before looking back at Sunnie. “Tell me again how you got this place. Your letter left some details to be desired. ” Sunnie took another sip, and then stood.

“I can do better than just tell you!” She trotted off behind the counter, and re-emerged with a large book. She plopped it on the table, making both the shakes and ice cream jump. “Bumble kept a photo record of all the competitions.” She flicked through the album, pausing only briefly to point out a photo of herself in the crowd when she was young, and finally landed on the competition she had won. She slid the book over, and Cinder took a look, levitating her shake over to her and continuing to drink as she listened to Sunnie’s play-by-play of her victory. Eventually, her straw slurped at the bottom of the cup, and Sunnie took a break from attempting to emulate one of her belches to getting Cinder a refill. As she did, Cinder couldn’t help but notice how much wider Sunnie was compared to her photos, giving her a very obvious look-over as she came back.

“The milkshake business looks good on you.” Cinder said, smiling as Sunnie flushed and spluttered. “Velvet Melody’s a lucky mare.” Sunnie was about to reply, but as she sat back down, her aforementioned wide flanks bumped the table, unsettling everything on it. Cinder’s horn lit up as she quickly stabilized everything, but not before a dollop of ice cream from the sundae slopped on the book.

“Oh, drat!” Sunnie said, quickly grabbing a napkin and soaking up the spill. “Guess we should start eating that, it’s melting pretty fast.” She winced as the napkin disintegrated in the glob. “Double drat, I gotta wash this off. Don’t wait for me to dig in!” She called over her shoulder as she scurried back behind the counter. Cinder’s eyes followed her until she was out of sight, then turned her attention to the sundae. Even half melted, it was impressive, a fairly large bowl of vanilla and strawberry ice cream, topped with a thick glaze of blueberry juice and full berries. Cinderheart levitated a spoon out of the treat, and took a bite. She closed her eyes and let out a happy sigh, letting the rich flavours wash over her tongue. Half the sundae had disappeared before she noticed Sunnie closing the blinds and flipping the ‘open’ sign over to ‘closed’. When she sat back down, Cinder gave her a quizzical look.

“What’s that about?” She asked, having another spoonful, shivering at the tasty chill. Sunnie couldn’t help a smile from crossing her face, a very mischievous one.

“Oh, nothing. I just don’t want anypony coming in and interrupting us.” Her smile grew wider as she focused on Cinder’s nose. “I never forgot when we had tea that one time, you know?”

“Oh? Would you like me to make you that tea again? You were very cute, and very, very tasty as a little blimp, after all.” Cinder teased, before stifling a burp behind her hoof. While delicious, the milkshakes and ice cream had been far more filling than she would have expected.

Guuuuurrrrrrgloooooorp

Sunnie’s smile got even wider when she heard Cinder’s belly rumble, and she giggled.

“Oh no. I’m not the one turning into a blimp.” She reached over and tapped Cinder’s nose. “You are, cutie.” Cinder’s eyes crossed, and she noticed with a start that her nose was now a light shade of blue. Confused, she grabbed a napkin to wipe it off, only to see her hoof and foreleg turning the same colour. She looked down at herself, and her eyes grew even wider. The blue was slowly spreading over her entire body, and as she watched, her belly started to push outwards, and she started to feel even fuller. Sunnie giggled again, leaning on the table and smiling at Cinderheart. “You see, we’ve been having some… issues with the blueberries. They were magically cultivated, and if somepony has too many, well…” Sunnie gestured at Cinder’s bloating belly. “You see.” It wasn’t just her belly that was swelling anymore, as her flanks and forelegs began to puff up with… juice? With a surprisingly loud slorsh Cinder got off her stool. She let out a little yelp as she tottered on her hooves trying to get her balance, unaccustomed to the sudden new weight. Sunnie licked her lips as she watched Cinder’s swelling form wobble, the final patches of yellow and orange on the mare being swallowed by blue and violet. Sunnie stood, and after double-checking that all the blinds were closed, planted a kiss on Cinder’s cheek, one hoof rubbing gently against the side of her rounding belly. Cinder glared at Sunnie.

“Well, if you’re enjoying this so much, let's see how you like it.” Her horn glowed, and she focused on getting a spoonful of the ice cream forced into Sunnie’s mouth. But even as the spoon lifted, the golden aura around her horn turned violet, and the spoon dropped back down with a plop. Whatever magic was filling her had negated her own magic.

“Oh, I will.” The smile on her face was full of lust. “You wouldn’t believe the fun me and Velvet had when we first found out about this.” Sunnie gave her a gentle smack on her plumpening butt, and Cinder quickly lost her balance, all the juice inside her sending toppling forwards. She let out a self-conscious moan. She just kept getting fuller and fuller, every inch of her was getting more and more sensitive by the second. She tried to get back on her hooves, only to realize her forelegs couldn’t touch the ground anymore. Cinder kept swelling, her belly spreading across the floor, picking her futilely kicking hindlegs off the ground as well. Now fully stranded on her giant gut, Cinder could feel herself filling up faster. She bit down on her tongue, not fast enough to stop a moan as she felt her crotchboobs swell with juice, growing larger, heavier than they ever had before. She could hear the juice inside her, sloshing and gurgling, the pressure building and building. Her forelegs were being swallowed by her blue belly, so swollen she could only wiggle them helplessly. Sunnie walked around the blueberried mare, licking her lips as she watched her friend grow and grow and grow. Cinder let out a squeak as her face began to swell too, her cheeks bloating, mouth filling with the taste of fresh, juicy blueberries. Her new chins merged with her chest as her head continued to slowly sink down. The pressure was colossal, and Cinder saw the ceiling approaching her as she continued to swell. Finally, with a last shudder of growth, the pressure stopped increasing, and Cinder realized that she wasn’t growing anymore.

Cinderheart was gargantuan, filling a majority of the main floor space of the Blue Bee, a sloshing, immobile blue blob. The juice had bloated every single part of her, even her ears looked a little larger than normal, but it was her belly that had been affected the most, becoming a towering, round balloon of juice several ponies wide that was constantly churning, emitting gurgles and grumbles without pause, so loud her panting breaths were almost inaudible to her. Her forelegs were thicker than most pony’s barrels, and her flanks had grown immense, each cheek twice, maybe three times the size of even Sunnie’s plentiful rump, her cutie mark tinged blue and stretched out across the vast expanse of juice-filled pony. She wasn’t quite perfectly round, instead she resembled a water balloon, the weight of the juice squishing her belly down. The weight was something she’d never truly experienced, though the feeling wasn’t all too unfamiliar. She’d dabbled with spells and potions that dealt with inflation before, and laid on a pony’s belly that had been filled by a lake she’d made sentient, but it was nothing like this. She just felt so heavy, and the pressure! It was astounding, every single inch of her was sensitive, and even the light brushing of her now-blue mane, blown by the AC of the Blue Bee, against her back was making her gnaw the inside of her lip. She heard the sound of a table being moved, and Sunnie popped into view. She had to stand on one of the tables, and even then Sunnie could barely see her face. The yellow mare reared up and put her front hooves on Cinder’s chest, promoting a muffled moan as she felt the juice slosh all around her body in response. It took a minute for her head to clear, and when it did, Cinderheart saw Sunnie’s smiling face.

“Look at you! All ready for the contest tomorrow!” Sunnie teased, leaning forwards and planting a kiss on Cinder’s bloated, blushing face. “You taste ripe enough, alright. I’ll need some help rolling you out the door though…” Sunnie trailed off when she saw Cinder’s expression change to one of fear when she mentioned getting help. “I’d bet you don’t want anypony else to see you like this.” Cinder shook her head as vigorously as she could, which amounted to her nose wiggling a quarter inch from side to side. Sunnie’s expression softened even more, and she laid another, softer kiss on Cinder’s cheek. “It’s okay. Nopony’s going to come in before you’re back to normal, I promise. It’ll take a little bit, but once I get most of the juice out, you’ll digest the rest. The blue stains should wash out in the shower. Just relax, and enjoy the ride.” Sunnie rested her head on Cinder’s soft chest floof. “You know, you look really cute like this.” Cinder’s blush intensified, but she fixed Sunnie with a stern glare.

“I’m going to squash you!” Was what Cinder wanted to say. Instead, what came out was “mm mm-mm mmph mmphh!” Sunnie couldn’t help but snicker before she hopped down, and Cinder heard the table screech as it was dragged around her equator to her juicy rear. She let out another squeak when she felt Sunnie’s hooves press against her flanks, and then…

“Mmm? MMMMMMMMMMmmmmmmph!” Cinder’s muffled question morphed into a long moan as she felt Sunnie’s tongue gently circle her bloated nipples, her eyes rolling back in her head as Sunnie teased both her crotchboobs, her hooves digging deep into her plump, blue rear. She moaned again as Sunnie nibbled them both, and Cinder felt juice dribble out of her, the pressure across her body slackening, vaguely. Then, all thoughts vanished as Sunnie’s tongue moved upwards, to her tight pussy, her hooves now kneading Cinder’s crotchboobs, juice flowing out, soaking the tall mare in blue. Cinder’s entire body was quaking, her hooves twitching, the juice sloshing back and forth like the crashing waves of a storm as Sunnie licked and nibbled and sucked her clit, her muzzle stained as blue as Cinder’s. An orgasm exploded deep inside of her, a blue firework that grew and grew with each slosh of juice, until her vision clouded with stars and a scream wrenched from her lips, and then another, and another, a cascading waterfall of pleasure, each climax fueling the next, and the next, and the next. She wasn’t sure when Sunnie stopped eating her out, wasn’t sure when her hooves stopped juicing her, it was only when the juice stopped sloshing inside that she managed to focus her vision again, and she saw Sunnie’s blueberry-soaked face smiling at her as she gasped and spluttered, trying to get her wind back.

“Did you enjoy that?” Sunnie said, licking her lips in a vain attempt to get the blue off.

“Mm-hm.” Cinder’s cheeks were now a little less bloated, and she found she had a little more mobility with her fore and hindlegs again. “I’m shtill going to get you back for thish.”

“I know.” Sunnie leant forwards, planting a long kiss on her lips, then tossed her sopping mane back from her face. “I’m looking forward to it.” Sunnie’s own belly let out a loud gluuuuoooooooorp, and Cinder noticed that Sunnie’s potbelly had swollen considerably as well. It seemed that most of the juice leaking out of her hadn’t gone to waste after all. Sunnie followed Cinder’s gaze and smirked. “Oh, don’t worry about me. I took the antidote before you arrived. I don’t think the floor could take two ponyberries.” She giggled, and with a final peck on Cinder’s cheek, she slid off her to the floor, waddling to the closet for a mop and bucket to start clearing some of the juice puddle that had spread throughout the Blue Bee. Cinder felt an idea form in her head, and despite how tired she was, decided to put it into motion. She closed her eyes, concentrating. It started with her mane, which faded and wisped into smoke. Then her tail joined, and over the course of a minute, the rest of her immense body joined in the growing smoke cloud swirling by the ceiling, a decidedly blue tinged smoke. Sunnie returned with her bucket and mop, and when she spotted the empty void that had used to hold a Cinderberry, she froze, and her mop clattered to the floor. She raced over to the spot on the floor, looking around frantically. Velvet hadn’t been able to move for a few hours afterwards, how in Tartarus has Cinder managed to vanish? Then her eyes looked up, and she spotted a swirling vortex of blue smoke above her.

“Well, that’s something you don’t see everyday.” She muttered to herself as the smoke reformed into a vast, blue belly, with Sunnie centered directly below Cinder’s cavernous belly button. “Oh.” With an almighty CRRRRASH that caused every single item not bolted down in the Blue Bee to jump, Sunnie was squashed under the full weight of her blueberried friend. Cinder let out one last moan as the juice sloshed violently inside her, more leaking from her crotchboobs before she settled, realizing just how comfy her massive body really was, her eyelids feeling heavy.

“Told you.” She murmured to the wriggling pony trapped beneath her.

Within minutes, Cinderheart was asleep, and visions of blueberries danced in her dreams.