Having masturbated herself to sleep last night, Apple Bloom was worse for wear the next morning. Sharing awkward glances with her sister did not lighten her mood either. After breakfast, she grabbed her saddlepack and began her journey to the schoolhouse. Her demeanor was broken up by the chirping birds that happily flew around, and the early-morning stroll through the light, morning air soothed her nerves. However, the smelly sock/crotch smell was still there, and she guessed there was a connection between it and the lack of the usual ponies going about their usual morning business.

“Hey, Apple Bloom, how’zit going?” Scootaloo called from a distance.

“I’m good, you?”

“Good.”

Apple Bloom and Scootaloo could tell each other was hiding something through their forced smiles. The two kids went on their way toward the school not sure if they should say anything. Apple Bloom almost went through with it when she commented on the persistence of the odor, but she decided she would not. Looking back, the pleasure she got from rubbing truly thrilled her, and she wanted to talk to discuss it somepony.

“Jeez, that smell is really getting annoying, isn’t it?”

“Yeah, you’d think somepony’d do somethin’ about it,” Apple Bloom agreed. The awkward silence after that stifled any more conversation, so they continued on their way to the schoolhouse. Sweetie Belle joined them later on, but her mood matched theirs in the first place, so the three fillies walked together in uncharacteristic silence. Other schoolchildren on the same route as them were also noticeably uneasy or confused, so adding to the fact that the marketplace and roads were emptier than usual, an otherwise normal morning was awfully strange.

Cheerilee quieted the fillies and colts for class. Her demeanor unchanged from yesterday, she launched right into a lesson about fractions. What surprised Apple Bloom the most was how the smell did not appear to affect her teacher. She went on to demonstrate common denominators when the red-maned filly heard her stop abruptly. It was as if she ran into a brick wall. She stared off into space for a solid ten seconds before catching herself. She followed through with the example, but when she was done she took a little break to sit at her desk.

Cheerilee sighed, “Class, I’m afraid we’ll have to take the rest of the day off, I’m not feeling too well,” She smiled forceably at her charge, knowing they would love to spend the day in the sun, rather than sitting around inside, “Featherweight, I’d like to talk to you about the school newspaper, and the rest of you have a wonderful day.”

Apple Bloom’s pencil dropped out of her mouth staring, then she began packing up her things. Just like that, school had ended for the day and everypony was heading home.

“Apple Bloom!” Scootaloo called while she and Sweetie Belle hung out in the yard, “So weird, huh?”

“I know!” Apple Bloom’s face scrunched up in thought, “Ah’m bettin’ it has to do with this darned scent. Scootaloo, you notice anythin’ strange happen in yer house last night?”

The orange filly blushed and looked away, “yyyyeah...”

“And you too, Sweetie Belle?”

The white unicorn thought back, “Well, yeah, Mom ’n’ Dad were making their yelling voices like they do sometime. It kinda makes it hard to get to sleep.”

Apple Bloom and Scootaloo looked at her expectantly. Scootaloo pressed, “Aaand, didn’t you see anything?”

“Of course not. They forbid me to see them when they’re making their noises. They say they’re okay and I should try to get to sleep.”

There was an awkward pause while Sweetie’s friends realized how much she didn’t know. Then, Apple Bloom shook her head in dismissal.

“Okay, so, this smell is everywhere in town and it’s causin’ all the mares to-” she gasped mid-sentence.

“What?!” Sweetie and Scootaloo yelled.

“SHHH!” Apple Bloom motioned for them to follow. Once they were behind the school, safely out of sight of most curious passersby ponies, she spoke in a low voice, “I don’t think Cheerilee only wants to talk to Featherweight about the newspaper.”

“What?” Sweetie Belle asked, confused.

“The smell is making all the mares to go into heat!” Scootaloo’s hushed voice answered.

“‘Gsactly!” Apple Bloom said.

“Whaat?” Sweetie’s voice squeaked, still confused.

“Heat! It’s like when pets start actin’ all funny and needy,” Apple Bloom tried to explain, “It’s really, really weird when it happens, but it has somethin’ to do with sex.”

“Sex?” Sweetie’s voice cracked again, “like... that adult thing only adults do?”

Scootaloo and Apple Bloom face-hoofed while the country filly continued, “Okay, y’know how sex is where foals come from, right?” Sweetie nodded, “Well y’ gotta, y’know … the colt has to plant the seed, in a manner’a speakin’, for the foal to grow inside the mare...” Apple Bloom nodded, hoping Sweetie Belle would understand, but all she got was a long stare.

“But-”

“OKAY, so!” Scootaloo couldn’t take it any more, “The colt sticks his weiner-I mean-penis into the mare’s cooter-er- vagina, and ejaculates his semen stuff into her and a foal starts growing.”

Sweetie Belle hung her jaw and stared disgustedly at her friend, “wh-wha...”

“Look, Sweetie, it really ain’t-” Apple Bloom started.

“That’s disgusting!” Sweetie Belle blurted out, still trying to keep her voice down, “I mean, that’s where pee comes out!” She folded her forelegs and looked away, “I can’t believe you two,” she shot in a whisper.

Apple Bloom and Scootaloo smiled at each other, but as Apple Bloom started to speak, she was interrupted by a voice coming from the open window above them. Their hearts jumped in their chests and the girls pressed themselves against the wall.

They heard Cheerilee’s voice, “...yes, and another thing about the editorials...”

Scootaloo whispered in Apple Bloom’s ear, “You think Cheerilee’s really gonna try something?” Bloom pressed a hoof to the pegasus’s lips and nodded. Scoot brushed it aside, “But...Cheerilee... She’s not like that.”

Apple Bloom turned back and nodded again. After what she saw last night, though, she wasn’t too sure anymore. The teacher pointed out a few things in the paper, and then she became quiet. She heard the sound of hoofsteps and a very low voice, then for the first time, Featherweight’s own voice.

“M-Miss Cheerilee, that-” the teacher shushed his high, boyish voice. Apple Bloom, Scootaloo, and Sweetie Belle collectively squirmed when they started hearing moans come from their classmate, his cute voice whimpering and whining. It died down after a few minutes, then they heard more hoofsteps.

“Now my little stallion...” Her voice was low and weak, like a pained begging. The three fillies’ eyes went wide when they heard their teacher gasp and cry out Oh, Featherweight!

Sweetie turned to Apple Bloom and whispered, “Are they um, doing it?” Bloom pressed her hoof against the soft lips of her friend and nodded at her sidelong.

“M-Miss Cheerilee, it feels so good!” the young colt cried in his tart voice. The ponies’ moans came faster and faster as Featherweight pumped harder and harder.

“Oh Sweet Celestia, keep going my stallion! Show me how much you’ve bloomed!”

Sweetie Belle’s curiosity got the best of her. The ivory filly got on her back legs and slowly rose herself to the window sill.

“Sweetie Belle!” Apple Bloom whisper-screamed at her friend, piercing through the sound of sex, “You trying to get us caught?”

Sweetie turned back, “Just a quick peek, don’t worry,” she inched her eye over the ledge and peered into the sunlit room in spite of Apple Bloom biting her own lip.

She stifled a gasp when she saw Featherweight on top of Cheerilee, facing away from her thankfully. His haunches slammed back and forth against his teacher, his small ball-sack bouncing against her plot back and forth. She stared at their visible connection, his meat sunk moistly into Cheerilee’s encompassing, plump pussy. He was humping her furiously and using his young wings to help. Sweetie’s voyeurism made her feel a strong tingle in her crotch. The copulation voices rose, and with one final OH Featherweight plunged himself home, letting loose his seed into her, spilling some in the process.

It required a tug of the tail to get Sweetie Belle to pry her eyes away from the scene. The fillies scurried off quietly and tried on their best poker faces for the road, but they couldn’t help feeling a warm dampness between their legs.

Scootaloo grunted in excited agitation, “This is fucking wild!” she profaned under her breath.

“Scootaloo!” Apple Bloom yelled, to which Scoot smiled meekly, then she noticed her wings, “Yer wings’re up.”

“Oops,” she giggled.

“What the heck’s going on here?” Sweetie Belle said, worriedly.

“This smell’s makin’ the whole town crazy,” Apple Bloom stated, “Girls, we gotta get to the bottom of this or else nothin’s gonna get done around here, and since we don’t got as much’a reaction to it, I reckon it’s up to us, the Cutie Mark Crusaders!”

“Alright!” Scootaloo urged her wings to go back down, “But how do we get rid of it?”

Sweetie Belle giggled, “Hehehe, bottom.”

Bloom looked up, “My sis always said that if’n ya got a problem, ya gotta git to the heart o’ the matter, so we need to find out what’s makin’ the smell. Then we gotta stop it,” she put her hoof down in a no-nonsense manner.

“Okay, okay,” Scootaloo finally got her wings under control, “But how do we find it?”

“We need to do some research. Girls, to the library!”

Sweetie Belle poked her, “Uh, can we get some lunch first?”

“Yeah, I’m starving,” Scootaloo said.

Apple Bloom had to admit she was hungry, herself, “Alright, to Sugarcube Corner, then the library!”

Sweetie Belle couldn’t get her mind off the sight of Featherweight slamming his body against her teacher, plugging her up with his thick boyhood. Whenever she dwelt on it, she could feel a tingle in her crotch tickling the outside and reaching deep into her fillyhood. She didn’t know what to do about it or how to make it go away, and she couldn’t help what she saw. She sipped on her apple-juice with a blank stare as Apple Bloom and Scootaloo discussed what they thought was making the smell.

“I bet it’s somepony trying to mess us up, like a spell,” Scootaloo imagined.

“Maybe it’s a monster that eats ponies by luring them in,” Apple Bloom mused, “or maybe it is somepony casting a spell, and it wasn’t on purpose.”

“Can you even cast a spell without knowing it?”

“I have no idea. Sweetie Belle, does that even happen?” Apple Bloom looked at Sweetie whose head was in the clouds.

“Sweetie Belle!”

“Huh? Sorry,” Sweetie Belle blushed.

“Can a unicorn cast a spell on accident?” Scootaloo asked.

Sweetie Belle cocked her head, “What? I don’t know, I’ve never even used magic.”

The trio fell silent as they took some more bites of sandwich.

“Hey girls, another batch of cookies is done! Keep an eye on the shop, please?” a tissue stuffed Pinkie Pie called out to them, then she was out of sight.

Apple Bloom turned back to her friends, “Are those tissues?”

“Yeah,” Sweetie Belle said, “and how many times has she gone back to get cookies?”

When the fillies finished their sandwiches, they left, leaving behind a happily exhausted looking Pinkie Pie. En route to the library, they heard several lustful cries muffled behind closed windows if they listened close enough, and the roads usually crowded with pony patronage were not so crowded today. They noticed that there were plenty of kids out doing chores and playing with each other, some of which waved as the girls passed, but they could tell that even the most reserved adult was trying to hide their arousal.

They arrived at the library without incident, but when they tried approaching the door, Apple Bloom slammed face-first into a magical barrier.

“What the hay?” The filly brushed a hoof against her tickled snout.

“It must be because of the smell!” her orange pegasus friend assumed.

“Does this mean we can’t get in?” Sweetie Belle asked.

“SPI ~KE! TWILIGHT!” Apple Bloom called, loudly. After a few seconds she tried again, “Spike, it’s Apple Bloom!” she called. Soon enough, the scaly head of their dragon friend popped out the door.

“Can you guys keep it down? Twilight is very busy today, so we can’t have guests, sorry!” Spike’s purply little head disappeared back into the treehouse.

“Wait, Spike! SPIKE! … SPI ~KE!” frustrated, the cream colored pony kicked at the forcefield, “SPIKE-!”

Spike’s head whipped back into view, “I said no visitors today!”

“Spike we’re tryin’ t’ help!” Apple Bloom noticed the green-spined dragon’s expression change at this.

“Yeah, Spike, we wanna help get rid of the smell!” Sweetie Belle yelled.

“Oh, that,” Spike took a moment to consider their offer, “I’ll go talk to Twilight, but I’m not promising anything,” the door shut and the fillies were left alone.

After a few minutes, the air seemed to energize and the purple bubble surrounding the treehouse gradually melted away.

The door clicked open again while they walked up, and Twilight Sparkle herself peeked out. The young mare looked frazzled with exhaustion.

“N-now, hurry, you three, and don’t touch anything,” She beckoned them inside.

The treehouse was in disarray making it hard to actually not touch anything. Notepads, books, chemistry glassware, and all of the like littered the floor and tables. Twilight reflected the state of the treehouse, with her unkempt hair and fur, bags under her eyes, and sweat covering her body. A musky scent, similar to the one outside, permeated the air.

Twilight turned uneasily on them, “Now, girls, I’m sure you’re very confused about what is happening lately, and I assure you it will all be figured out,” the purple pony proudly gestured to her equipment and research, “even now I’m on the verge-er- approaching a … chemical solution to counteract hormonal reactions to this air. I...can’t say for sure when it will be done, but when it is I’m planning on mass producing the solution for distribution across town...” She frowned at herself on realizing she had completely lost the foals, “Basically, I’m making a cure.”

Apple Bloom nodded, “Oh! Well we’re goin’ to find whatever it is that’s makin’ this smell so we can stop it.”

Twilight thought a few seconds, “Well...It is kind of dangerous, I don’t even think you should try it.”

“But we’re the only ones who can!” Scootaloo said, “All of the grown-up ponies are, well, busy, but we aren’t even bothered by the smell, so it makes sense for us to do it.”

The older pony sat heavily putting her head in her hoof, then grunted, “But you guys just don’t understand! Not only could whatever is creating it be dangerous, but bad ponies, completely overtaken by hormones, not caring who they come upon, maybe even in groups, they could swoop in and violate you,” it was clear Twilight’s overactive imagination, along with the stress of work, had overtaken herself. She sighed, “Especially unsupervised, I just can’t let you all roam around Ponyville in good conscience. I-” she gazed at the young fillies’ innocent, sympathetic eyes, “I can’t bare the thought of you three beautiful fillies getting in that awful situation.”

The three young fillies looked at each other, searching for an answer between them. Sweetie Belle approached the distraught, exhausted Twilight in consolation, “We understand, Twilight, but we still want to help somehow. We don’t want to stand around while our town... well... you know, so we still wanna help,” she smiled, “Like with your work, maybe, around the treehouse? And what's a hormone?”

Twilight Sparkle smiled gratefully, “Thank you, Sweetie, and thank you Apple Bloom, Scootaloo,” the others beamed back, “A hormone is a neurological, I mean, brain chemical that our bodies naturally produce to signal for certain reactions to happen. For instance, um...”

“AAAAAAAAGH!” Spike’s voice screamed from upstairs putting everyone on alert, and his little purple body appeared from the top of the stairway seconds later, “TWILIGHT! The plant is growing!”

Something caught in Twilight’s throat as her pupils shrank in size, “What? Which plant?!” she yelled.

Spike caught his breath, “There’s a little-well, was little-plant by your bed that looked all dead and shriveled, so I watered it and it started growing like crazy!”

“NonononononononononoNO!” Twilight shut her eyes, her brain going into overdrive, “You didn’t use the bucket sitting nearby, did you?” She hopelessly asked.

“Uh, yeah, but it wasn’t really water, it was all drippy.”

“NO, Spike, what’ve you done?!”

"I don't know, what have I done?!"

Twilight gasped at a few crashes from upstairs and she raced toward it followed closely by Spike, “Girls, stay down here!” she warned.

Sitting on their plots, the girls heard strange noise after strange noise with the odd shout by the magical pony. They exchanged glances, then Scootaloo clopped hesitantly to the stairway.

“Scootaloo!” She heard Sweetie Belle’s pleading voice and the young pegasus looked back at her frightened friends.

“C’mon you guys, it’s just a plant, how bad could it be?” She half reassured herself, and continued up the stairs.

Apple Bloom and Sweetie Belle glanced at each other, the sight of Twilight’s fearful face going through their minds, then Sweetie guessed, “Maybe she’s just really stressed out?” and she followed slowly after Scoot.

With a breath, Bloom steeled herself, “Consarn it,” and she followed Sweetie.

Scootaloo followed the winding staircase toward the bedroom, crashing and thumping noises seeming to have died down. After a few seconds to allow her friends to catch up, she reached out a hoof toward the door handle. Turning it, Scootaloo swung the door open.

What they found took a moment to process. A huge, viney vegetable filled the room, giant claw-like roots clinging to the whole ledge that held Twilight’s bed. The thick vines sprawled with life, knocking books off bookshelves. Most started out fat at the base, ending in bulbed tips, and smaller vines lashed out like whips. The fillies squealed when they saw Twilight, roped up and suspended by the thing’s coils, two of which thrust in and out of her rear holes, dripping viscous fluids everywhere.

Upon seeing them, Twilight yelled, “NO! RUN!” but before they could react, a thin rope whipped forth and caught Scootaloo by the foreleg making her scream. It whipped her back toward the ropey mass and the other girls screamed. When they turned to run, their hind legs were caught, and they were dragged back in like Scootaloo.

The room whirled by in the three ponies’ eyes. They felt vines curl all around them, fixing in place in a snug, firm grip. The slimy, tentacle-like appendages groped and probed, despite the gasps, whines, and whinnies of protest. In all the chaos, Sweetie Belle noticed Spike, strung up like themselves, receiving a pounding to his tail-hole. Soon, the three fillies’ bodies were drenched with the clear, viscous secretions of the monstrous plant, and with each prod from the vines at their pussies and tail-holes, the girth of each vine got smaller.

No! Why are you touching me there? Sweetie Belle shuddered at each lubricated swipe and prod at her dirty parts. With every touch, she could feel a burning feeling increase in her underbelly, and with it, a confusing urge for something more. She hated and feared being tied up and held, but after seeing Cheerilee and Twilight being penetrated, she only had curiosity at what that felt like.

She had her eyes shut tight while being felt up, but she cracked an eye open to check on Apple Bloom and Scootaloo. Surprisingly, her pegasus friend already had a vine thrusting in and out of her, and with each of her breaths came a long, high moan. The young filly squirmed and bucked her hips against the vine’s treatment.

A vine wantonly tickled Sweetie’s slit, and the curly-maned girl gasped at the shocking pleasure, what was that? She wasn’t allowed to ponder it any more, since the shocks kept coming again and again, each followed by her whines. This vine, which was considerably smaller than the first, hadn’t backed off, and Sweetie Belle knew this was it. She gritted teeth as it pushed against her plush folds, spreading them apart. She gasped as it reached her insides, and squealed when it tore into her innermost parts. Every twiggy vein, each leafy bulb rubbed against the ribbed, soft tissue of her fillyhood, and when it moved back and forth inside her, she could not stop her moans. Some unknown force made her feel like humping the air back and forth.

Before long, the warm, phallic vine shoved into her suddenly, and a hot, thick fluid shot forth, filling her hole. The sensation of it made her lose her mind, panting and moaning. It receded, with a lot of spilling liquid, and shot more of the stuff all over her, coating her belly and tail-hole. A similar vine threaded itself along her backside and groin, snaking the tip from her belly, past her slit, to press against her anus.

No! Sweetie Belle clenched herself around the tip, but the lubricated probe stretched its way inside and the poor filly’s plot-hole was painfully filled, making her drain her lungs in a prolonged moan. It reached up a ways, then started its piston motion again. It made her feel strange, like she had a huge poop, but it gave a different sort of pleasure. She couldn’t make sense of it, but it was there, making her feel so good, despite the sting around her anus.

Another vine, perhaps the first one, or a fresh one, approached her girl-slit and Sweetie’s heart skipped in anticipation. It crammed deep inside her front hole with no reservation and it alternated its thrusting with its brother. In her foalish sexual mania, Sweetie Belle didn’t care about anything else anymore, only that she hoped and guessed that the thing would squirt inside her plot-hole and fill it up as well. The filly arched her back when the feelings intensified. She bit her lip, and a heat-wave of sharp pleasure racked her body, clenching repeatedly at the intrusions. She let out a high, heavy moan. More liquid poured into her at an astonishing rate while her orgasm subsided.

In a matter of seconds, Sweetie Belle’s insides were so full that she could feel every pint that leaked out her holes. A lull in the activity gave her the chance to see how the others were doing. The other crusaders looked to be in the same condition as her, drenched in a white, sticky lubrication and getting their plots and pussies stretched and filled. The sight of them shocked the white filly back to reality, and she assumed that she must have looked the same, getting pounded so thoroughly.

How long will this go for? She questioned in fear, How much more can I take?

As the vines continued caressing and violating her, she focused on them again, sensing a calmer behavior. The vines dove into her again, this time a little slower. The difference in pace was new and welcoming now that she could feel all of the features of the cylindrical invaders. She sighed.

Without warning, one of the vines slithered between her lips, causing a squeak in surprise. She pressed her tongue against it, while it continued to the back of her mouth. It started back out then shoved in again, and she realized it wanted to use her mouth as another hole. She didn’t really care. After a few more minutes, it issued forth a hot stream of strongly bitter, gooeyness down her throat, and she coughed as the gagging vine retreated and she felt her watery eyes leak tears down her face.

Mere minutes felt like hours. The cycle continued, getting everypony covered and their sensitive parts rubbed raw. The crusaders were becoming fatigued at all the treatment, even hungry, and just wanted to be let down to be free. Although the young ponies were exhausted beyond speech, Apple Bloom managed a plea to Twilight.

“Twilight, do somethin’!”

The lavender pony looked her way and nodded with determination, unable to speak with her mouth full. Searching the room, Twilight reached out with her magic, producing what appeared to be a kitchen knife. With some concentration, she sliced hard and fast through the vine that stuck into her mouth, and the monster reacted with a violent spasm. The appendage slipped out of her onto the floor, and she groaned sickly.

“I … I’m so sorry, girls,” Twilight apologized for them to have gotten caught by the monster. If only she had kept the plant hidden better.

After Twilight sliced through more vines, her creature lost its liveliness, setting its captives to the floor and ceasing to move most of its limbs. The girls lay in a puddle of fluid and exhaustion, tentacle vines flopping out of their sore holes. They were a mess. Sweetie Belle felt like she could take a nap for hours, but would never get to sleep when feeling so gross.

“I need a bath,” She said, simply.

Apple Bloom and Scootaloo groaned in agreement, testing out their limbs against gravity. After taking five to catch their breaths, the four ponies and dragon slowly picked themselves up. First, Twilight walked over to the three violated schoolfillies she was in charge of, stricken by guilt.

“Oh girls, I can’t believe this,” she spoke regretfully, “Are you alright?”

“Mostly,” Said Apple Bloom.

“Only my pride hurts,” said Scootaloo.

"Twi, what's this thing doing in here?" asked Apple Bloom.

Twilight hesitated to answer.

“I need a bath,” Sweetie Belle repeated.

Twilight smiled in relief, quickly replacing it with worry, “I’ll go draw some hot water,” she cantered off in a stiff gait, like she had something stuck between her legs.

“Well, Sweetie Belle,” Scootaloo said, “There’s your crash course.”

Author's Note

It's like the monster under the bed episode.