"To identify a potential mate, the mimic will watch the victim from the safety of her chest. Once she determines that the pony is suitable to her needs, she will pull the unlucky mare into her chest. The mimic exhausts her victim's energy through vigorous intercourse, then devours them for sustenance." - The Equestrian Explorer's Guide to the Equine-Monstrum

Twilight Sparkle was annoyed with something. Pinkie could always tell when Twilight was annoyed. It was like a second sixth sense. So, a twelfth sense. Twilight's eyebrows were turned down, her snout was scrunched up, she was breathing huffily in that way she did. It was so obvious, it was staring her in the face. What Pinkie didn't know was what exactly was annoying Twilight so much.

"So what are you going to do now, huh, Twilight?" Pinkie asked, her whole body quivering with excitement. "Just wondering, because I'm not doing anything right now, and if you're not doing anything right now, we could both be not doing anything together! I mean, we would be being together, which isn't not anything, I guess, but it's close!"

Twilight gave that funny exasperated sigh again. "For the last time, Pinkie, I'm not doing not anything. Nothing. Whatever. I'm going up to see Applejack. She found another one of those monsters that have been bothering ponies lately."

"Oooooh," Pinkie said as understanding shot through her. "You mean one of those things that keep having sex with our friends."

Twilight blushed and sped up a bit. "Um... Yes. One of those things." She adjusted her saddlebag and turned the corner onto Main Street.

"I wanna meet one." Pinkie giggled as Twilight whipped her head around, giving her a scandalized look. "What?" Pinkie asked, shrugging. "Seems like it'd be fun. Can you imagine, having lots of kinky, uninhibited sex with a monster?" She wiggled her eyebrows at her friend. "So exotic," she said luridly. Then she laughed uproariously as Twilight's cheeks burned crimson. "You should see the look on your face!"

Shaking her head, Twilight trotted forward, Pinkie Pie skipping along behind. "Sorry I'm not as comfortable talking about-" She scanned the street for anypony listening in, then lowered her voice conspiratorially. "-sex as you are."

"Pbbbbbt." Pinkie shook her head and chuckled. "Everypony has s-e-x. Fluttershy's having it with Petal. Lyra and Bon-Bon are having it with each other. Berry Punch has it with Celestia knows who. And from what she tells me, Rarity's having it two or three times a day with her slime friend. Now Applejack's found somepony, and I bet you, me, and Dashie are next!" Twilight's mouth clamped shut at Pinkie's bluntness, and she suddenly found something in the sky that held all of her attention. "What? I'm just saying what we're all thinking!"

"Well, I don't want to... do it with a monster. I want my first time to be with somepony special. Somepony I care about. Somepony who loves me."

"Oh, Twilight," Pinkie said, dropping into a husky voice. She leaned in close to the unicorn and said, "All you had to do was ask."

Twilight froze dead in her tracks and turned to see Pinkie grinning wildly. "Pinkie!" she shouted.

The earth pony bounced away. "I'm sorry! I'm sorry! You're just so easy to mess with!"

Twilight kept her stern face for a solid ten seconds before it dissolved into giggles. "Yeah, I guess I am."

"Look, Twi-pie." Pinkie hopped around her friend, stopping in front of her. "Sex is fun! It's like... A cupcake! Everyone loves cupcakes! I eat as many as I can! Except this cupcake, you get to eat as many times as you want and it's not bad for you! But, you also share the cupcake with your friend, and the both of you get to eat the same bestest cupcake ever!"

"A cupcake..." Twilight said, incredulously.

Pinkie scratched her chin. "So maybe that wasn't the best way to describe it. Sex is like... An eclair? Because it has a cream filling?"

Twilight rolled her eyes. "Okay, Pinkie. But I would prefer if you didn't joke about sex with me."

"Sure thing, Twibrary!" Truth be told, Pinkie had been quite serious. Pinkie looked her bookish friend over. Twilight wasn't in perfect shape, like Rainbow Dash, and she wasn't very strong, like Applejack. She didn't wear stunning makeup or gorgeous outfits, like Rarity, and she was far too outspoken to have the quiet, unassuming features of Fluttershy. But she had the stern kind of beauty that comes from dedication. When Twilight talked about her studies, or her lessons with the Princess, her face became so animated, so fierce and with such a bright spark in her eye, that it often became hard for Pinkie to hide her moistening pussy, to keep from pulling her friend forcibly into bed.

Talking about her friends' intimate lives had also gotten Pinkie a little hot under the collar, even if she wasn't wearing any collars to be hot under and the weather had actually cooled down a bit. Her mind was already drifting to that collection of toys she had buried in her nightstand's lower drawer, in particular a nicely-sized brown one with a slender shaft and a wonderfully positioned pokey bit that stuck out at the end. Or maybe she could find one of her stallion friends, one who had his own house... What was that?

"So, do you want to come with me to Sweet Apple Acres?" Twilight was saying, but something had completely captured Pinkie Pie's attention.

The pair had arrived at Pinkie's home, the bakery and sweets shop called Sugarcube Corner. Everypony in Ponyville gets to Sugarcube Corner at some point in their day, and now it was Twilight and Pinkie's turn. But Pinkie wasn't concerned with the delicious pastries, even though on any other day, they would have been the first thing on her mind. What amazing treats there were inside too, cakes and pies and creme donuts, all just waiting to be devoured.

No, what had captivated Pinkie was a large box, wrapped in pink paper and tied with a red ribbon. It was big. Pinkie could probably fit inside even, if she wanted to. Frozen with anticipation, Pinkie stared at the gift. Pinkie Pie loved gifts, even more than she loved food. She loved giving them, she loved getting them, she loved wrapping them up, and she loved tearing them open. Sometimes, she would get herself something, wrap it in tissue paper, and then leave it in her room, just so she could open it at the end of the day.

"Is that yours?" Twilight asked, also looking at the oversized present.

"I dunno," Pinkie answered. "It's not my birthday for another thirty-five days. And Hearth's Warming Eve isn't for months!" She searched for a tag. "Maybe it's for Mister and Misses Cake. Their anniversary's this weekend! Hmm, I have to get them a gift. But maybe I got this for them and forgot!" A small card was nestled in the bow on top. Pinkie slipped the cardstock out of the envelope. There was a drawing of a balloon on the front, and when she flipped it over, the back read "To Pinkamena Diane Pie" in curly letters. "It's for me..." Pinkie said. "Oh! It's for me!" She hopped around the box, inspecting it from all sides.

"Who's it from?" Twilight stared at it curiously.

"I dunno. Didn't say." Pinkie poked at the present. It was heavy, too heavy to shake, and it didn't make any noise. Whatever was inside was packed up good.

"Are you going to open-" The bell tower rang, interrupting Twilight's thought. "Oh, shoot! I told AJ I'd be at her farm by now! I have to go." She turned to trot down Main Street, then stopped. "Do you need my help getting that inside?"

Pinkie was already pushing it through the door. "No, I got it! Thanks!" Twilight nodded and was off.

Returning her efforts to the box, Pinkie grunted and put her head against it. Stiffening her muscles, she pushed it up over the single step and into Sugarcube Corner. The gift tipped over and fell with a crash onto its side.

"Pinkie!" Mrs. Cake shouted from the kitchen. She waddled into the front room, her hips swaying as she balanced a tray of muffins on her back. Mrs. Cake's belly jiggled with each step, what Mr. Cake affectionately called "her chubs". She was a thick mare, heavily-built from a lifetime of eating and perfecting baked sweets. Someday, Pinkie thought, she would look like Mrs. Cake, and that was a-okay with her. Hay, with her own chubby tummy, she was already halfway there. Pinkie stared at the mare's blue bottom as she walked to the display area, and shifted her legs at the renewed tingling between them. She distracted herself by returning her attention to the present.

Depositing the tray on the counter, Mrs. Cake hurried over to find Pinkie struggling to flip the box right-side up again. "Where in the heavens did you find that, dearie?"

Straining, Pinkie righted the box, and it came down once again with a heavy thud that shook the room. "It was outside," she said. "Did you and Mister Cake get this for me? My birthday isn't until next month!"

"No." Mrs. Cake angled her head towards the kitchen. "Honeybun, did you get Pinkie a present?" she shouted.

"No!" Mr. Cake yelled back. "I thought we were going to try to bake her a thirty-layer cake for her birthday!" Pinkie Pie gasped, then looked at Mrs. Cake with wide, shining eyes.

Mrs. Cake smiled. "That was supposed to be a surprise. Just act like you didn't know when we give it to you."

Pinkie threw her forelegs around Mrs. Cake and hugged her close. "Oh, thank you thank you thank you thank you!" she said. "That's the bestest present ever!"

"It'll have to compete with whatever's in there." Mrs. Cake pointed at the gift which sat by the door. "Who gave it to you? Did one of your friends wrap themselves up and send themselves to you?"

"I don't know," Pinkie said. "It didn't say who it was from."

"Okay, you have fun. Don't hurt yourself getting it up the stairs. Do you want my husband's help?"

"That's okay. I can do it!" Mrs. Cake ambled back to the kitchen, and Pinkie Pie pushed the box to the staircase.

The inside was solid. It felt like hardwood, not the paper or plastic that gifts normally came in. She hauled it up the steps, grunting and straining every inch of the way, until finally it was resting in the center of her room. Pinkie sprawled out next to it on the carpet, breathing heavily. The ceiling was still covered in streamers from her last practice party, and the smell of frosting - sugary sweet - was thick in the air. Flailing her hoof around, Pinkie passed over a ballon, some streamers, a dildo, and Gummy, before she found a cupcake and shoveled it into her mouth. Moving things around was hard work!

Her strength returning, Pinkie bounced up. Her first instinct was to tear apart the wrapping paper as fast as she could. "No no no," she said, holding her hooves up. "What if they want me to wait 'til my birthday?" She read the card again, but it gave no further hint as to the identity or motive of the sender. "Hmm... If they wanted me to wait, they would have written 'Don't open until your birthday' on it!" Satisfied with her logic, Pinkie gripped the end of the ribbon in her teeth and pulled, hard.

The bow came undone, and the ends of the ribbon slid off and to the ground. Pinkie gripped a flap of the pink flowery paper and tugged. This was a pleasure to Pinkie almost as good as spending the night with one of her special toys. The wrapping ripped off, revealing a dark brown wood underneath. "Oooooo," Pinkie exclaimed. "I wonder what it is!" She pulled and ripped at the rest of the paper until it was all lying in bunches around the gift.

"Huh," she said finally.

It was more of a chest than a box or crate. It was rectangular, and seemed to be crafted out of a single piece of wood. The chest was inlaid around the top with an intricate chain motif, surrounding a stylized pony face. The sides were also carved with chains that criss-crossed themselves as they wrapped around the chest. The lid of the chest was thick, maybe a hoof-and-a-half thick, and a large golden crest with a keyhole suggested that it was locked. There was no key.

"I wonder who sent me this..." Pinkie rapped on the side with her hoof. It didn't sound hollow. She pushed on the lid, straining against the lock, but it remained resolutely shut. "Come on, you dumb box! Open... up!"

With the sound of metal scraping against metal, the lock slid open. Pinkie fell back onto her rump and stared as the lid open a crack. Two eyes, deep, earthen brown, looked out. "Pinkamena Diane Pie?"

"Oooooooooo," Pinkie said, moving in close. She didn't recognize the eyes, and she knew the eyes of just about everypony in Ponyville! And that meant... "You must be someone new!"

The chest didn't open any further. "Pinkamena Diane Pie?" the pony repeated. The voice was deep, and feminine, almost grumbling.

"Yes!" Pinkie shouted, jumping up and down on the tips of her hooves. She couldn't wait for the surprise, since that's what this had to be. "I'm Pinkie!"

The lid flew open with a bang, and a fierce wind started to blow. Pinkie, already half in the air, was tipped headlong into the chest. She managed a strangled yelp before the box snapped shut, enclosing her inside.

Her head still reeling from the sudden disorientation, Pinkie stood up. "Hello?" she called out. Her voice echoed weirdly, and she couldn't see much in the low light. If she reached with her hooves, she could touch both sides. The ceiling was a few hooves above her head. That was weird. The chest seemed bigger on the inside, just large enough for her to turn around, maybe. And where was the pony who had spoken to her?

"Hell-oooo!" she repeated, and her voice bounced back, "Hello! Hello! Hello!"

"I'm ready for the surprise now!" She thought for a second. "I mean, I'll still be surprised even if you do it! Because I don't know what it is! So, go ahead!" Pinkie stood quietly for a second, listening intently and rocking back on forth on her hooves.

There was a slight scraping sound, and then a hole opened up in the wall of the chest. Pinkie couldn't make out what was behind it. But there it was, hanging there, about as wide as her hoof. Pinkie crouched down slightly and put her eye to it. She couldn't see anything. "Hey!" she said. "Anypony out there?"

She stepped back. Something was coming through the hole. It was long, cylindrical, and mottled black and orange. Pinkie knew exactly what it was.

"So it's this kind of surprise." She grinned. Might as well be her birthday after all.

The dick was large, maybe four hooves long. It had a broad, flat head that mushroomed out of the shaft, and a thick medial ring around the center that pulsed. It was black at the base, and transitioned to orange about halfway up. Veins rippled along the stallion's length, and clear drops oozed from the hole in the center of the head. Pinkie's slit, already running hot, moistened at the sight of the monster. "Is that all for me?" she asked, innocently. The cock bobbed in response, and Pinkie's smile widened.

She sat down and ran a hoof gently along the side of the shaft. It strained forward, as if seeking her out, and the stallion's balls dropped into the chest through the hole. Pinkie hefted them with her other hoof, feeling them tighten at her touch. "I bet you've been saving up a lot of cum in here for me," she said, her voice low and sultry. "Do your best to let it out." Inhaling deeply, she could smell the musky scent of the member, and her tongue fell out of her mouth, a line of drool spilling onto the floor. Without warning, she ran her tongue along the bottom of the dick, from the balls all the way up to the head. A dribble of precum ran into her mouth, and she sucked it down hungrily. The taste was bitter and salty and made her weak in the knees.

"Mmmm, juicy!" she said. Opening her mouth as wide as she could, she slipped her lips over the flared cockhead. The dick pulsed, and she could feel the stallion's heartbeat against her tongue. Pinkie grinned through a mouthful of cock and started to bob her head up and down on the shaft. It stretched her jaw uncomfortably, but Pinkie pushed further and further, until the head was knocking on the back of her throat like a battering ram.

Taking a deep breath, Pinkie opened up her throat and sank the penis inside her all the way to the root. She hummed as it filled her, sending vibrations through the shaft and her tongue. She held it as long as she could, feeling her nose press against the hard wood of the chest's wall, until finally she released it with a gasp. She coughed, letting herself breathe again, as she stroked her new friend happily. "Are you ready for the full package?" she asked. She wasn't sure if the stallion could hear her, but his dick didn't move, so she took that as a yes. With another deep breath, she inhaled the stallion's shaft.

This time, she didn't hold it, but rocked her head up and down over the entire length of cock. She moved faster and faster with each motion, her saliva and the excessive amounts of precum lubricating his dick. One of her hooves slipped between her legs and Pinkie began to see stars. She couldn't remember the last time she'd been this horny. She stroked herself while she sucked, rubbing her hoof into the moist folds of her pussy and shuddering at the warm pleasure spreading out of her nethers. Something hot was coiling in the pit of her stomach, squirming and wriggling inside her belly.

The balls tightened, a warning sign that Pinkie recognized right away. She moved as fast as she could, then deep-throated the shaft. Cum burst out of the cock and shot straight down her throat and into her stomach. To keep from choking, she pulled back until the head of the dick was resting on her tongue. Another pulse, and her cheeks bulged with the salty treat. She tried to swallow it all, but before she could get even half of the load down, the next wave came, spilling out of her mouth and all over her chin. Pinkie let the dick drop out of her mouth, and it sprayed its next blast in her mane. She could feel the spunk dribbling down her forehead, it was so thick.

The stallion shot onto her face again and again, hitting her nose and cheeks and chin until she felt like a glazed doughnut. She swallowed, then directed the cock towards her open and waiting mouth. The stallion obliged, and gave her stream after stream of sticky white filling, until finally he petered out and the last few drops fell to the floor. Pinkie gulped, then licked the final dribbles from the stallion's cock. "Delicious." The dick shrank, receding back into its sheath, and was withdrawn. The hole closed up behind it.

A small puddle had formed underneath Pinkie's plump posterior. "That was fun-a-fun-fun," Pinkie said to the empty chest. "Is there any more?" As if in answer, another hole opened up in the wall behind her, and a yellow and brown dick poked through it.

"Just what I wanted." This dick was smaller than the other one, but had a thicker shaft and a knobby head that bulged in all kinds of mouth-watering ways. It was already pointed at Pinkie's rear, so she stood up and backed into it. The head bumped against her tight plothole and skidded upwards, resting between her asscheeks against her tail. "Ohhh," Pinkie moaned. She hadn't had anything in her ass for a long time, but that cock was pushing all the right buttons. "Maybe later..."

She realigned herself and tried again. The dick glanced against her wet pussy lips and slid between her thighs. She squeezed her legs together and held it there, throbbing against her dripping sex. Pinkie rocked back and forth on top of it, grinding herself into the shaft. She groaned contentedly, then yelped. She had started winking, her tiny button of a clit peeking out and touching the achingly hard cock. "Let's get this party started!" Pinkie yelled, and in one swift motion, she released the cock from her grasp, lined it up with her hole, and threw herself backwards onto it.

It was a testament to how thoroughly aroused she was that she slid back until her ass was against the hard wood of the chest without any resistance. The stallion's meat parted her pussy's inner walls easily, pushing into her deepest part. "Ah!" she yelled. The cock seemed, if anything, to be growing thicker, pressing up against her folds. It felt sooo good to leave it there, twitching inside, but Pinkie wanted more.

She leaned forward, savoring the glorious emptiness inside her. Her lips gave up the cock grudgingly, sucking on it as though trying to keep it from leaving. And then she plunged back down.

The round head bulged against her insides, scraping her walls and sending tongues of fire shooting through her limbs. Her clit was winking madly, and her knees were shaking so badly she could barely hold herself up. She started to pump, willing her legs to stay steady as she crashed down onto the dick. Each thrust sent a wave a pleasure through her body, and she felt her mind go numb with the joy of it. Tiny gasps were slipping past her lips, and soon they had turned into screams of ecstasy, each one punctuated with the solid thump of ponyflesh hitting hardwood. With a hoof, she reached between her legs and rubbed ferociously at her clit.

The electric wire in her stomach writhed, and suddenly, like a switch had been flipped, it came to life. Pinkie came, hard. Her muscles seized and she was stuck with the dick deep inside her. Her walls clenched on it, gripping the hardness and contracting like a wave, milking the cock. And it didn't disappoint.

The stallion came like a firehose, cum blasting inside her, filling her with a blazing warmth. Spurt after spurt went inside her, until it overflowed around the dick, running down her slit and her thighs. "Eeeee," Pinkie was moaning through clenched teeth, unaware of herself or her surroundings or anything except the amazing feeling of a hard cock in her pussy.

Finally, the ride came to an end. The dick withdrew with a lewd squelch, and the hole sealed up behind it. Pinkie's legs gave out, and she slid down to the ground, her ass sliding along the wall and leaving a trail of jizz and marecum.

"That was good," she said. She felt her slit with a hoof, then brought it to her mouth and tasted the creamy cocktail. "Good thing I'm not in season," she said. That wouldn't have been fun to explain.

"So, are we done?" she said aloud to whoever had planned this. "I wanna meet you guys!"

There was no answer.

"Helloooo?" Pinkie called. There was a brief rumble, and then a section of the wood was sliding in the floor beneath her. Something hard and round was poking through it, right into her belly button! Pinkie giggled. "That's not where that's supposed to go, silly!" She slid forward until the new dick was positioned properly, and then she sat up on it.

"Oh!" she shouted. It was inside her before she even noticed. She looked down at the place where they were connected. The cock was black, spilling out of a white sheath, with a pair of big, white balls under it. Semen trickled out of her cunt and down the cleft of the sack. She patted it. "I bet you've got a lot of jizz for me too."

Pinkie raised herself up, cooing at the familiar sensation, but before she could bring herself back down on it, another hole had opened up in the floor. This one was less than a hoofspan away from the white stallion's cock. "Two?" she said out loud. "How do they even fit on the other side like-"

The next dick shut her up. It was light blue, and bent slightly to the right. It prodded up at her stomach, like it was searching for somewhere to bury itself. "Hmmm..." said Pinkie, scratching her chin. "Aha! I know just what to do." She stood up, her pussy clenching, and took a tiny step forward. This time, she lowered herself down carefully, using one hoof to steady herself and the other to aim the blue prick at her cunt. The head popped in and Pinkie was already in heaven, but there was still another one to deal with.

She reached back around, underneath her tail, and found the black cock. Shifting her thick hips side to side, Pinkie pushed the cock up against her pucker. Relaxing her anus, she went down, and the sperm-slickened shaft slid in smoothly. "Ohhhh," she groaned, and then she dropped.

Pinkie had popped her anal cherry a long time ago, and she wasn't even a stranger to double penetration (that had been a fun Tuesday), but she felt fuller now than she ever had before. Each cock alone was huge, but both of them together... It was like that time she'd eaten the whole Marzipan Masquerpone Meringue in one go, that same unbearably-stuffed-with-sugary-goodness feeling, but instead of her stomach, it was her entire lower body. Princess Celestia had been so amused by the whole Meringue Madness, while Twilight had fretted and fumed. She wondered what they would think if they could see her now. She wondered if the Princess had ever met a monster.

The two dicks withdrew, and then returned slowly, penetrating deeply together. There was only a thin wall of flesh squeezed between them, and Pinkie could feel every ridge, every vein, they had. She struggled to breathe, the pleasure causing her to moan almost continuously, but then they pulled back. Pinkie Pie sucked in a delicious breath of oxygen as cool air wafted over her glistening pussy and plothole. And then the two really went to work.

They began to alternate, one pushing in while the other pulled out. Their medial rings bumped against each other once on each thrust, and Pinkie gasped in time with it. Her eyes rolled up in her skull, and she could feel her tongue lolling out of her mouth as saliva dripped down her front. She simply felt too good to care about that right now.

Pinkie didn't know how long she went on like this before she noticed that two more holes had opened up in the chest. She was bouncing roughly on the cocks when she saw that her friends from earlier had come back. The pale yellow dick was to her left, leaking precum, and the orange one stood proudly to her right. "Well, you two - mmm - already got to go inside me, so - oh! - you'll have to wait your turn if - wow! - you want to go again."

The dicks remained, so Pinkie placed a hoof on both of them and began to stroke as best she could with her other two invaders. They responded well, coating her hooves with their sticky syrup.

Then, and here Pinkie gasped in disbelief (though her gasp also turned into a moan), a fifth hole opened up, this one right in front of her eyes. A fifth cock, larger than all the others, dropped in. Its heavy weight made it swing, and Pinkie found herself salivating. It was purple from base to tip, with a throbbing medial ring and a bulbous head almost an entire hoof in width. Veins pulsed up its entire length, and the cock already looked about to pop. The two dicks inside her thrusted together, pushing Pinkie forward. She opened her mouth and engulfed the fifth one just as easily as she had the others. Her throat, already lubed with copious quantities of cum and saliva, swallowed it greedily.

There were five dicks around her now, all thrusting and pushing and clamoring for attention, and Pinkie gave them all she had. When she slid the purple dick out of her mouth to breathe, she ground her hips down onto the blue and the black. When the blue one had bottomed out against her cervix, its head trying to push through into her womb, she stood back up, and the purple dick dove down her gullet again. And with each piston back and forth, she pumped the orange and yellow dicks as hard as she could.

She was concentrating so hard on pleasing the stallions who were showing her such a good time, that she didn't even notice her own orgasm until it was almost upon her. Her whole body felt like an oven, and that live wire inside her was running fit to burst. But she couldn't cum like this, she knew. Without some kind of something on her winking clit, she'd run hot forever.

And, like the chest had heard her, a sixth hole opened up. This one was in the ground, just above the blue cock. Another dick, this one slender, long, and bright pink, came through. It went up, and up, until its head disappeared in the folds of Pinkie's pink pussy. She groaned around the cock in her mouth, then dropped one more time.

The pink cock connected with her clit.

It was like every muscle inside her contracted at the same time. She screamed, thrusting herself down and forward, burying all three dicks as deep as they would go. Her pussy and ass squeezed down on their captives in waves, refusing to release them, and all the cocks answered in turn.

The one in her ass was the first to cum, as it stuffed her anus full of buttery jizz. The throbs of the black cock spurred on the blue, and that one unloaded in her pussy, blasting her cervix and coating her inner walls. The purple dick pumped its load right down her throat, and Pinkie could feel her stomach filling up with sperm. The two in her hooves unleashed twin jets, covering every inch of her body in a sticky glaze. Finally, the pink one that had brought on her own orgasm came as well, and cum gushed over her clit and dribbled around her cunt lips, dripping down them and onto the floor of the chest.

At once, all six cocks withdrew, leaving Pinkie in near-darkness. "Hello?" she said, her legs twitching worse than when her Pinkie Sense was telling her about a beautiful rainbow. She waited a moment, but nopony said anything, like, "Happy Birthday!" or "You were a great fuck!" Pinkie wrinkled her nose in confusion. Ponies usually said one of those two things to her after they were done. With a jump, she burst open the lid and spread her forelimbs wide. "Surprise!" she yelled. "You all were awe-"

She stopped. There was nopony there. Even more confused now, she climbed out of the chest (nearly slipping on her cummy hooves) and looked around her room. It was the same as before, no jizz-filled tissues, no exhausted stallions, just a bed, some streamers, a dildo, a couple books on how to throw a better party, and Gummy chewing on some wrapping paper.

"You!" A voice behind her made Pinkie turn in surprise. A brown mare was standing in the chest.

"Oh, hi!" Pinkie Pie said cheerfully. "Thanks for throwing me that party! I-"

"How did you escape? No pony can open my chest. You should be half-dead from exhaustion!" The mare's voice quivered with barely contained rage, like a tea kettle just before it starts to boil.

"I'm sorry. Did you want me to come back?"

There was a bestial roar and the mare's form shifted, her features oozing and running like melting ice cream. An arm snaked out from the chest and grabbed Pinkie around the neck, pulling her forward. Pinkie gasped and wriggled, but the thing dragged her inexorably towards the chest, and she saw that the inside had turned into a giant mouth, with hoof-long, razor-sharp teeth and a red writhing tongue.

Pinkie screamed and twisted her head. With a sucking noise, the thing's arm slipped over her cum-covered coat, releasing the petrified pink pony. The chest monster roared again and lunged for her, but a bolt of lightning from across the room struck its arm. The monster screeched and receded, and a pink glow around the lid shut the chest tight. Chains materialized around the chest and tightened down, holding it shut. The chest rattled, and there was another roar, and then it fell silent.

"Are you okay?" This was Twilight's voice. Pinkie turned to look and there she stood in the doorway, her hooves set in a solid spellcasting stance and a look of determination on her face. Twilight met Pinkie's eyes, and there was a sudden rush of tears. "Are you okay?" Twilight said again, her voice trembling. "I realized what this was when I got to Applejack's, and I teleported here right away."

Pinkie Pie stared at her, then at the chest, then back at Twilight. "I think I'm okay, actually."

Twilight dashed across the room. "I... I thought I wouldn't make it in time!" she howled, throwing her forelegs around her friend. Then she let go and jumped back. "Ewww," she said. "What is that all over you?"

***

Pinkie Pie turned off the shower. The flow of water stopped, and she stood in the tub listening to the sound of water dripping off her body. Her tummy felt upset, still full of that monster's cum, but at least she was clean now. She toweled off and went back to her bedroom.

Twilight had drawn a large circle in chalk around the monster and covered it with small symbols that Pinkie didn't recognize. She was sitting in front of it, concentrating on a half-moon she was making. "What're you doing?" Pinkie asked. Twilight didn't look up, but remained focused.

"Celestia taught me these runes. They're a way to keep the mimic from ever hurting anyone again. I'm sealing it in its box." Twilight finished drawing another symbol, then prodded the chest with her horn. The chalk glowed pink and began to smoke, and Pinkie saw that the symbols were etching themselves into the wood. The monster roared, and strained against its bonds, but the chest remained shut. Twilight sighed in relief. "When this is over, I need to take this back to Tartarus. For now, I'll keep it in the basement of the library. Don't want Pound and Pumpkin to find it."

"'When this is over'?" Pinkie repeated. "When what's over?" She stared at the chest, dormant now, and presumably locked up tight. She remembered the monster that lurked inside, and her carefree remarks earlier about how exotic the monsters were. Her stomach turned over, and she nearly threw up on the carpet.

Twilight stood up. "I don't know who's sending these monsters, but I can find out where they're coming from. And when I do, we're going to go and stop them."

Author's Note

Whew, fourth chapter! This was a great one for me. Used waaaaay more sex than I'm used to, which was a fun challenge.

If you've read this far, please favorite, thumb-up, or especially leave a comment. Nothing motivates me more than logging into FIMfiction and seeing a new comment asking for more. You can and should also suggest a monster mare you'd like to see. The present-mimic was suggested by multiple people, and I thought it made a great pairing. I've already matched Twilight up with something, but Rainbow Dash's is still "up for grabs", as it were. Leave a comment and let me know who you'd like to see doing Dashie.