Tanks for Nothin'

by RadPanic

Rating: mature
Tags: Porn, Fetish, My Little Pony: Friendship is Magic, Rainbow Dash
Length: 2475

Rainbow Dash tries to sabotage winter. She drains the winter lab's water tank. But all that water has to go somewhere... [Inflation story]

For Rainbow Dash, the most logical response to Tank's impending hibernation is to cancel winter. And the best way to do that is to sneak into the Cloudsdale weather factory and sabotage the water tank. But all that water has to go somewhere...

[Inflation fetish story.]

Published 2015-09-13 23:50:02 UTC
Last updated 2015-09-13 23:50:02 UTC

Winter **** up, winter **** up...

Winter **** up, winter **** up...

“The winter lab,” Rainbow Dash said as she leaped through the double doors. “We’re in, Tank!” She gave a yank on the leash, pulling the sluggish tortoise after her before the doors could shut. “Now we just gotta figure out a way to shut it down.”

Dash scanned the whole chamber, taking in all the machinery that the Cloudsdale weather workers would use to blanket Ponyville in winter—that is, if Dash didn’t stop them first. Which she totally would. Anway, the lab’s blue-gray walls were lined with equipment: snowflake microlathes, the cloud assembly line, ionizers, processors, fluff injectors...

Rainbow adjusted her “borrowed” lab coat and flew over to a workbench, holding Tank under one foreleg. “Sabotage snowflakes?” she said. “I think we gotta go bigger than that. ...Wait here.” She set Tank down next to a bowl of snowflakes, looping his leash around a lamp, before darting off to examine more machinery. “Hmm. We could get rid of these clouds, but... that's still not big enough.”

Rainbow bumped her hoof against a gray hose, wider than her own torso, then her gaze followed up to its source. She broke into a huge grin as she finally saw it: a glass tank, like a huge bell jar. Dwarfing every other piece of equipment in the room, it was filled nearly to the top with water—easily tens of thousands of gallons.

“Slam dunk!” Rainbow pumped one foreleg. “With no water, they can't make clouds or snow! They can't make winter!”

Dash’s voice roused Tank slightly more awake. Forgetting his master’s admonition to stay put, he flew towards Dash, dragging the lamp behind him. His wakefulness was short-lived, and he dipped and wobbled in the air as he flew across the room.

Dash perched on the gray hose at the base of the tank and spun a valve handle to... well, she had no idea what it did, but it sure looked important. “I hate to do this to those weather ponies, but desperate times call for desperate measures!” Then she braced herself against the tank’s side and shoved the hose with her hind legs. The hose didn’t budge.

———

In another universe, just two or three degrees separated from this one, the Cloudsdale weather workers had neglected to re-tighten the largest water hoses during the last round of routine maintenance. So, in that universe, Rainbow Dash’s strength was enough to dislodge the hoses and drain the tank, flooding the winter lab.

In this universe, the weather ponies remembered to maintain the large water hoses. It was the smaller hose to the wimboscopic deframbulator that they forgot to tighten.

———

“Rrrrrrrgh!” Dash grunted, as yet another hose refused to budge. “Come on!”

She scrutinized the water tank, seeking another vulnerability—anything she could exploit. Then she found another hose, only a bit wider than her own hoof, all by itself. It ran down to a nondescript gray box, bolted to the floor.

“Aha!” Rainbow declared. “The wimboscopic deframbulator: the weakest link in every weather lab!”

Tank drifted closer to her.

She grabbed the hose in the middle and pulled straight out. She immediately felt something give. After just a few more seconds of straining, the hose came loose from the deframbulator with a satisfying pop.

“Oopsies! Looks like it was a little loose!” Smirking, Dash hovered back a bit to admire her work. Water blasted out of the hose, forcefully enough to whip it back and forth as it sprayed everywhere. “And there goes winter down the drain!”

Tank, on the verge of completely losing consciousness, put on an unintentional burst of speed and crashed right into Rainbow Dash’s rump.

Tank’s momentum pushed Rainbow forward a few feet. “Whaaaa—” she said.

And as luck would have it, the hose snapped towards Dash at that precise moment—and slipped right into her open mouth.

“Mmmmhh?” she mumbled around the hose as it blasted water straight down her throat. Her eyes widened, and her pupils shrank to pinpricks as she felt her stomach fill to what she thought was its absolute limit—and then continue filling. Underneath her lab coat, her belly began to swell.

Dash flailed her legs in the air. She found it harder to remain airborne with every gallon of water the hose pumped into her—for every inch her stomach grew, she sank two or three inches closer to the floor. It wasn’t just the added weight pulling her down. Her expanding waistline jiggled every time she moved, which was seriously throwing off her coordination.

When she finally landed, her now-triple-sized belly cushioned the impact, wobbling beneath her. “Mmhhrrmm!” Her mind was awash with the sensation of her stretching stomach and sloshing liquid inside, but she pushed through that daze. She reached forward to pull the hose out of her mouth, but it was so wet she couldn’t get any grip with her hooves—all her effort did was jiggle her still-expanding body a little more.

The lab coat grew tight as Rainbow’s belly inflated larger and larger inside it. The pressure forced more water into other, unconstrained parts of her body. Her wings stuck straight out and then inflated, with a Gloosh! Gloosh! as each feather filled with water. Her rump and haunches bloated to twice, three times, then four times their original size.

Tank bounced off Rainbow’s butt again, causing her ballooning body to jiggle and wobble further. “Hmmm? Hrrmmm!” Dash called out, staring hopefully at her pet turtle’s flight path. He was moving towards the base of the hose! Clearly he was going to find some way to shut off the water so she could get out of this!

Tank bounced off the side of the tank and careened away.

But wait—now he was flying towards the pump’s power coupling, to shut the water off there! Dash trembled with anticipation as he flew closer. No, actually that trembling was her gut straining against the lab coat as it filled with more and more water—but there was trembling and anticipation, so that was the important thing.

Then Tank bounced off the wall, a good two feet away from the power coupling. Only then did Dash notice the poor guy was sleep-flying. He sleep-flew right out the open window, disappearing from sight.

Rainbow gave a muffled grumble—at which point her lab coat finally decided it had had enough. Its seams tore apart, reducing it to scraps of white fabric that clung to Dash’s inflating body. Water rushed into her barrel, no longer bound by any clothing, giving her a more rounded, water-balloon-like appearance. Sloshing back and forth, Dash lowered her hooves and found she could no longer reach the floor. Her belly, swelling with more and more water beneath her, pushed her into the air, inch by inch.

“Hmmrrmm?” Dash whimpered as she looked up at the tank, at the countless gallons just waiting to pour into her, to bloat her to titanic proportions. The tank was still nine-tenths full; if nopony rescued Dash, all that water would inflate her to... to...

Rainbow Dash’s ears perked up, her pupils expanded, and a blush lit up her face. All of a sudden, she hoped that nopony would come to her rescue. “Mmmmmm...” she moaned, as for the first time she really paid attention to the pressure inside her, to the sensation of her stretching as she inflated. Her skin stung slightly—not painfully, but like a scratch on an itch that she had ignored for far too long. The cool weight of the water inside her was incredibly calming.

Dash’s forelegs rested on her growing belly, squishing into it like a waterbed. She pressed harder, sending waves of pleasure across her entire body as her gut wobbled beneath her—and sharper jolts from the spots where her hooves sank in. She closed her eyes and giggled through the hose, then pressed into her belly again, and again, and again. As she fell into a rhythm, she jiggled harder and harder beneath her own hooves. And with every passing second, she had more and more gallons to jiggle.

Larger and larger, Rainbow swelled, humming a merry tune as she sloshed herself over and over. Her gut spilled over the other weather equipment as it inflated—covering the assembly line and smothering the control panels. Wooden work benches broke to splinters under the unrelenting growth of Dash’s belly. But those crashes just made her wobble all the harder, and the broken planks made her skin tingle tantalizingly where they pressed into her.

Dash stopped humming. “Hrrm?” It was harder now to press into her own belly—and as she opened her eyes, the cause was apparent. Along with her belly, her sides had inflated so much that they were beginning to envelop her legs. Though she could no longer reach as far, every movement of her limbs still sent her body wobbling most pleasantly. In fact, the larger she bloated, the more pleasurable she found each slosh and jiggle.

A warning Ping! drew Dash’s attention back to the water tank. Red lights flashed at the bases of all the hoses, and—most worrying of all—the tank was nearly empty. “Mrrmmrrmm,” Dash muttered.

Suddenly, a rushing roar filled the room—and seconds later, more water poured into the top of the tank. The automated system, detecting the low water level in this tank, had refilled it from one of the dozens of backup tanks in the basement. Dash’s eyes widened with joy at the once-again gloriously full water tank—another helping of tens of thousands of gallons, just to fill her.

Squealing with pleasure, Rainbow resumed wiggling her legs. Gallon after gallon, she inflated further and further.

———

Sunshower stared at the open doors. Where the winter lab should have been, instead some sky-blue thing filled the entire doorway, bulging outward slightly. Carefully, she pressed a hoof against it, and it wobbled as her hoof sank in. And she almost thought she heard a sound as she touched the thing—the very muffled sound of a mare’s sensual moans.

Clanging above drew Sunshower’s attention up to the air vent, where Open Skies was wiggling free. “Well?” she asked him. “What’s going on in there?”

“Still not sure,” Open Skies said as he landed. “It’s either sabotage, or a really weird prank. But it looks like somepony hooked some kind of giant balloon up to the water tank.”

“How bad is it?”

“It’s almost completely filled the lab. There’s barely enough room to hover by the ceiling.”

“Darn it!” Sunshower started pacing. “All that water wasted, and the entire winter lab out of commission for who-knows-how long...” She stopped and spun to face Open Skies. “Hey, do you think we can get the water from the balloon back into the tank?”

“Hmm...” Open Skies looked to the side as he considered. “We’ll need every set of hooves we can get, but I think we can salvage this.”

———

Rainbow Dash was in complete ecstasy. She was growing more sensitive with every inch she inflated—now her skin was stretched so far that the slightest touch sent larger and larger waves of pleasure to her brain. As the tips of her inflated wings brushed against the ceiling—as her legs sank completely into her inflating sides, and she could once again press her hooves into her water-filled skin—she thought this couldn’t feel any better.

She was proven wrong when she started filling the room. On one side, she squished into various pieces of heavy machinery; on the other three sides, her bloating body pressed against the rough brick walls; and below, the cold stone floor and a few pieces of wrecked equipment tickled her massive belly. The tactile feedback across countless square feet of her ballooning body spurred Rainbow’s addled brain into undreamed-of heights of arousal.

Then pressure from above finally knocked Dash over the precipice. Dozens and dozens of points squished down on her—pressing a few feet into her water-filled mass, then releasing, then pressing again. They formed a steady rhythm and a pressure so wonderful that it drove all other thoughts out of Rainbow’s mind. So lost was she in the cloud of pleasure, she didn’t even notice she was now deflating.

———

“One... two... three...” Fluffy Clouds called. He rose into the air, and dozens of Cloudsdale weather pegasi rose with him. “Go!” He and every other pegasus shot straight down, pressing as hard as they could into the blue thing below. Their hooves sank a few feet into the elastic surface.

“Hey, it’s working!” Sunshower called. “The water tank’s refilling! Keep it up everypony!”

Fluffy Clouds rose up. “One... two... three... Go!”

———

“Alright, I think that’s enough,” Sunshower said. Open Skies nodded and stopped jumping on Rainbow Dash, then Clear Skies pulled the hose out of Dash’s mouth.

Sunshower rubbed her forehead. The water-filled, blue blob had somehow shrunken down to a live pony—and not just anypony, but Rainbow Dash. Even though she had seen it herself, Sunshower couldn’t quite believe it.

Rainbow splayed on her belly, panting heavily. She looked around at the ponies surrounding her, but considering her dull smile and half-lidded eyes, Sunshower wasn’t sure if Rainbow really saw any of them. She looked... really out of it. No, actually—and Sunshower blushed as she realized it—Rainbow wore the expression of a mare who had just rutted her brains out.

That, in turn, made Sunshower’s mind briefly wander to daydreams of muscular stallions with massive wings. Banishing those thoughts, she offered a hoof to the prone mare. “You mind explaining what the hay happened here, Rainbow?”

Dash shook her head and rose, wobbling slightly as she did. A few gallons of water still remained in her gut, and it squished out between her legs as she stood up straight. “Uhh... whaddaya mean, ‘What happened’?”

“I don’t know how you do things in Ponyville,” Sunshower deadpanned, “but here in Cloudsdale it’s a little odd for one pony to drink a hundred thousand gallons in one sitting.”

“Ah, hehe...” Dash rubbed the back of her head. “You see, I was trying to save Tank from—”

“Aha!” Open Skies cut in, draping a foreleg over her shoulders. “Say no more, Rainbow. I know exactly what you’re talking about.”

Rainbow didn’t even notice. “Oh my gosh! Tank!” She bolted out the window, leaving a wider-than-usual prismatic streak in her wake.

Sunshower raised an eyebrow at Open Skies. “You know what she was doing?”

“Of course! She...”

———

The next day, the front page of The Ponyville Express bore the headline:

Rainbow Dash Saves Winter
Pegasus Hero Singlehoofedly Stops Water Leak in Weather Factory

Author's Note

Just in case anyone was wondering: While Dash was inflating, Tank dug himself a nice burrow and got to hibernating. Much like in canon, Rainbow Dash’s friends helped her come to terms with spending winter without Tank.