Fallout Equestria: A slimy mission

by Dusty_Heartwood

Rating: mature
Tags: Sex, Fallout, My Little Pony: Friendship is Magic, Dark, Original Character, Porn, Fetish, Science Fiction, Profanity, Non-consensual
Length: 1599

A good Samaritan's mission goes bad

Dusty is a friendly and good natured doctor pony trying to help the ponies of the wasteland. But that's a bit difficult to do when you're a pacifist. Sure helping with her medical prowess is great, but she wants to be more hooves on. On the field, doing her part. So when the Followers of the Apocalypse ask the mare to clear some pipes in the sewers to help get water flowing, she jumps at the opportunity. But is there something down there waiting for our friendly Earth Pony?
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Contains: Dubious consent, slime, interspecies impregnation, oviposition, and slight egg inflation

Published 2023-07-18 16:40:00 UTC
Last updated 2023-07-18 16:40:00 UTC

An endeavour into the sewers

The request had sounded simple enough, in theory. The local contingent of the Followers of the Apocalypse were trying to get limited amounts of water running in the Fangholm Region. A noble endeavor to say the least. But something was clogging the pipes in the sewers, gumming up the water supply. Dusty, trying to get in good graces with FOTA, eagerly volunteered her services. She knew a bit about piping from her upbringing in the stable. It all seemed like a small task, go down to the sewers, find the clog, and clear it out.

But standing down in the tunnels now, the smell of refuse and other horrid things assaulting her nose. The dim green glow of the putrid "water", if it could even be called that. The Earth Pony medic began to second guess her offer to assist. Still, it sure beat having to kill things to get into the good graces of others, which seemed the norm in the wasteland. She proceeded through the sewers, the metallic click of her armor echoing off the ruddy walls, joining the sound of burbling sludge.

Once Dusty spotted the new pipes put in by the followers, they were simple enough to trace out. The fresh uncorroded copper was the nicest looking thing in these sewers, clean and unravaged by the savages of time. She smiled and followed the pipes. Her armored hooves clip clopping on the worn wet stones of the tunnels as she traced the lines to a bend. The u-bend was illuminated by the dull glow of the irradiated water nearby, but far enough away that Dusty's pipbuck Geiger counter hadn't begun clicking. But what marked it as odd, was the green goo covering the pipe.

The mare's brows furrowed as she leaned in closer to inspect it. The pipe was covered in a viscous slime, and where it touched the metal, it turned green and oxidized. There were even spots where the pipe wore through, like it was a 200 year old section instead of freshly placed. The slime on the pipe was corroding the metal and seeping into the waterline clogging it. Dusty sighed, this was going to be tougher than she thought.

Suddenly there was a plop as more goo fell from above. The Earth Pony paused, then looked up. She gasped as from above, she saw a glob of slime the size of two ponies hanging from the ceiling. Her eyes went wide as she tried to backpedal, but too little too late. The oozing mass detached from the filthy ceiling of the sewer and fell upon the wasteland medic like a bag of wet garbage thrown out an apartment window onto a passing pedestrian. The mare grunted as it fell upon her with a wet slap that nearly buckled her hind legs.

The struggle was on, the mare pulling at her legs, trying to buck off the slime. Her typical pacifist nature reserved for other ponies, not goo. But it was like trying to kick taffy or glue. Her hooves struck wet slime that simply clung to her armor or partially solidified around her legs. To her great horror, she found her hind appendages stuck and held fast.

The creature had now covered most of the mare's hindquarters and hind legs, rooting her in place. There was a hissing sound and the smell of burning metal. Dusty gasped, looking back to see her white painted armored plates yellowing then turning black as the slime ate away at them like the copper pipe. Whisps of smoke snaked up as the hardened steel armor melted like butter on hot bread. Next was the body glove that covered her flank. Her efforts at struggling were redoubled. She didn't want to be dissolved in a horrible slime creature. "No! No no! Goddesses! Somepony help! Please!" Her cries echoing off the stone walls, but no one was around to hear her.

Her black body glove melted away, exposing soft pale fur below and the mare's more delicate parts. Dusty awaited the painful stinging agony of her flesh dissolving but instead received something arguably far worse. The goo solidified in parts, something stiff yet slick slid along the delicate petals of her flower. She flushed and looked back in shock. A thick green tendril was teasing her tight marehood. "Wh-what?! No! You've got to be kidding me! St-stop, please!" Her desperate cries fell on deaf ears, if the slime even had ears.

She scrambled forwards, her forehooves pulling at nothing, her body slumping forward, her hind legs held firm. Now only presenting the slime with a mare rump perfect for toying with. As if satisfied that it had indeed found the desired orifice, it pressed forwards. Slowly, forcefully, the slimy appendage parted the mare's pussy lips, spreading her open with its thick room temperature tendril. A sensation that was entirely foreign to Dusty. Unlike a stallion's cock, it was slimy, firm but with some give to it, and covered in lumps and tiny ceilia. Her breath hitched in her throat, she shuddered her legs shaking. Her tight folds spasming, squeezing the thick invader. "H-hah... S-stop... P-please... Ngh..." But the slime was not dissuaded.

The mare tried to beg some more, but the goo was waiting. As she opened her muzzle to beg, another tendril forced open her maw. The mare's eyes went wide as thick viscous slime invaded her mouth, tasting of salt and decay. A strange metallic tinge and 200 year old food, what was this thing made off. Biting the appendage yielded no discernable result and was like biting a rubber ball. It would not be stopped. Then it squirted something thick and viscous down her throat. Dusty was forced to swallow or drown. Squeezing her eyes shut she drank the foul fluid. It dribbled down her throat, sticky to the walls of her esophagus.

The result was unexpected and wholeheartedly unwelcome. Reaching her stomach it felt warm, as heat radiated from her midsection outwards. After the intense heat came a tingling, then a doubling of her pleasure. Where the tendril entered the poor mare's vagina she felt a surge of pleasure. She groaned into the appendage molesting her mouth, realizing what was happening. Her pussy was growing wet with each surge of slime into her. What was a vile invasion was now starting to feel good. The slime was drugging her to make her more pliant and submissive.

Unfortunately for Dusty, and fortunately for the slime, it was working. Her pale face flushed red as she started to moan past the phallic invader in her mouth, licking and suckling it. She raised her silky brown tail, giving the slime a better go at what was under it. Her hind legs stretched, lifting her rump. Her tight inner walls spasmed and squeezed the invading slime cock. But sex with this creature felt nothing like sex with a stallion. Not only was the appendage noticeably thicker, there was scarcely any thrusting, just a slow and steady intrusion. The thick prick spread her tight folds as it pushed inwards, reaching her cervix and shoving against the tight ring of muscle defending her womb.

What should have been agonizing pain was turned to blinding pleasure as the entrance to Dusty's womb was wrenched open by the slime. She may have been enjoying herself now, writhing in forced pleasure. But the slime had a one track mind, a sort of animalistic pursuit. It filled the mare's womb, before swelling. The entire appendage sealing the medic's cunt causing her to squeal in delight, eyes rolling back. Her enjoyment evident by the drool dripping off her chin and the love juices running down her thighs in thin rivulets.

The creature shoved forwards and this was the straw that broke the camel's back. Dusty shook like a leaf, back arching and back legs shuddering. She moaned, eyes rolling back as pleasure crashed over her like waves thundering onto a beach. Wave after wave caused her to convulse and squirt mare juices onto the slime. She'd been forced to orgasm by this creature. As if satisfied, the creature squirmed before several lumps traveled down its slimy prick. The member swelling before depositing thick viscous eggs the size and rough shape of strawberries into the mare's uterus.

This only extended Dusty's orgasm, the horrid yet intoxicating feeling of having eggs pumped into her womb. She was being impregnated by a slime. She should, run, fight, do anything but lay there and enjoy it. But that's exactly what she did. She let it fill her to the brim, countless numbers of slime eggs. She felt her belly stretch slightly painfully, her body working to accommodate the creature's large clutch. When it finally finished, Dusty looked months pregnant, her belly stretching obscenely, her armor tight to her.

The slime pulled out of its mate and her hind legs wobbled before giving out. She fell into a puddle of slime and mare cum, panting heavily as she did. Her eyes unfocused and the only sound coming from her freed maw were pants and whimpers. Her head slowly clearing as she looked back to find the slime had slithered off into the darkness. Dusty looking down and setting a hoof on her swollen belly, thoughts racing. How was she going to get rid of these? How long until she hatched? How was she going to get home without any creature seeing her? What was she going to tell the followers now?

Mission Failed
You became a slime incubator

Try again?
[Yes] or no