Fluttershy Is Extremely Horny for a Giantess Twilight!

by B_25

Rating: mature
Tags: Porn, Sex, Fetish, Twilight Sparkle, My Little Pony: Friendship is Magic, Fluttershy
Length: 8748

Fluttershy and Twilight have been dating for a year... and they've only kissed! Twilight's shyness around sex has tucked Fluttershy into a hidden lust. But when Twilight accidentally grows into a giantess, Fluttershy will have plenty to explore!

Fluttershy and Twilight have been dating for a year... and all they've done is kissed! Twilight's shyness around sex has tucked Fluttershy into a hidden lust. But when Twilight accidentally grows into a giantess, Fluttershy will have plenty to explore!

[Cover by Maarthul]

Commission for Anon!

Want a story for yourself? Then check out my commissions page!

Published 2022-01-10 13:50:03 UTC
Last updated 2022-01-10 13:50:03 UTC

Lovely Confessions Inside a Purple Temple

Fluttershy Is Extremely Horny for a Giantess Twilight!
B_25

Fluttershy jumped at the two monstrosities breaking from the front of her home, explosions of wood followed by trains of thighs, each leg expanding and tucking the delicate mare in the valley between them. Another explosion burst from the cottage ceiling, a long, curving neck, showering debris as the heat settled in the sky.

Destruction rumbled and poured until it was no more.

Fluttershy covered herself inside the spread of her wings, daring to peek between the splits of her feathers, seeing the curved, lavender walls, thick with clumps of goodness. Slowly, her wings docked to her sides. Stumbling within the warm shadow, she glanced from thigh to thigh, their size and might, their overwhelming cushioning.

Looking behind her revealed their length as they carried across the land. Sinking into its curves and carving through its rises. Hills of grass and dirt spread beneath their underside, and a hazy mountain formed at the distant hooves.

Fluttershy's mane bobbed as he looked forward.

The door to her home remained. Deep cracks broke across the facade. The sides of the home were lifted on the thickest, roundest portion of the thighs, which loomed high above, with dust and parts of the remains becoming tangled in the forests of fuzz.

An immense blush stole across Fluttershy's face; the crux of the legs was beyond the door.

But, thankfully, she looked over the roof of the building, which was lifted and slanted onto sprawling, lavender shoulders. Fluttershy craned her neck to see the face of her love, obscuring the sky.

Twilight's shadowy face twisted into a mixture of closed eyes and a sheepish smile.

"T-Twilight?"

Twilight chuckled, which boomed in the open air, quaking the area,

"H-Hi, Fluttershy." Her voice deepened without losing its trace of Twilight Sparkle, the power of a voluminous chest aiding the effort. Despite being shy and nervous, its tone alone wreaked havoc on the ears. And not in a bad way. "Sooo, you may not like this, but I was fiddling with a spellbook while you were gone."

Fluttershy raised an eyebrow, facing the giantess with her side, still a doll in her marefriend's shadow. "Transformation?"

"Actually, expansion and subtraction, with a possibility of duplication." Those beams of lips shifted to the side, where a pair of teeth gnawed at them. "I was still hooked on the possibility of being able to shrink or grow objects and life by understanding and tweaking their genetic makeup."

Fluttershy's head lowered. Though caught with the space of the giantess, warmed by the waves of heat rolled from the thighs, her eyes settled forward at what was behind that door. Her blush persisted. A whiny pried at the back of her lips.

"So you started with yourself?"

"Actually," Twilight started and went to lean backward, hearing a tearing followed by crumbling, then clenching her tummy to return to her uncomfortable position. "I had started with an apple. Managed to double its size, too. Star Swirl the Bearded had already managed to do the same in his time. If we can make food bigger or ponies smaller, we can solve a lot of problems."

Fluttershy glanced back up at the giant's dimmed face. "Why did you attempt to grow yourself?

Twilight blushed as a flock of birds travelled up the back of her head. Her face scrunched as she shook her mane, the tides of hair flicking them away. Having them nest there would be another problem. "T-That, uh, w-well, you see, I wasn't going to grow myself—a-at least, not like... this."

Fluttershy sat on her haunches, crossed her forelegs, and wore a disapproving expression.

"It was just idle experimentation, honest!" Twilight continued. "I didn't think I was going to crack the spell so easily! Just a couple of idle tests to kill time! How could I know it would work so quickly—and so well?"

Fluttershy rolled her eyes but couldn't fight down her smile. Her body warmed for various reasons. A reason was set before a giant pony that could do anything with her. The fact of her depth between her marefriend's legs was another.

More and more, she craved to see what was behind that door, something great and grand, a place that had gone unseen. Twilight's rump consumed the ground floor of her home, the front of her crotch, Fluttershy's new living room.

Knowing that her pussy was wide and tall and able to take her whole.

N-No. Don't think like that.

"I suppose it can't be helped," Fluttershy started with great restraint. "I'll see about having Spike contact the princess about this." She turned away to look down the lane between the legs, seeing the journey before her. "She should be able to return you to normal.... and, h-hopefully, do the same with the cottage."

Thank goodness none of the animals were home.

"W-Wait!" Twilight's voice thundered through the ground at Fluttershy's first step, the force tickling through her legs. The shy mare jumped and yelped and fell, curving into herself with a flick of her tail. "D-Don't! I don't want the princess to see me like this! O-Or anyone else, for that matter."

Fluttershy peeked out from her tail to the massive face of Twilight Sparkle above. Twilight recoiled, one of her eyes scrunching.

"And I'm sorry for scaring you, Fluttershy," Twilight continued. "I'm... not used to this size. It still just feels like I'm normal—and everything else is tiny." She bowed her great head as tides of mane descended over her face. "I promise I can reverse this. Return your cottage to exactly how it was before this. But I need you to help me on this one." She swallowed and looked aside. "Can you do that for me?"

"Without a doubt."

Fluttershy's answer surprised even herself. She hadn't even been thinking. Zero hesitation. Rising to her legs, she looked up at the gigantic mare, smiling and, when her love looked back, she did the same.

"So, what do you need me to do?"

That's when Twilight winced an eye in pain. Inhaling intensely through her snout, the suction of air was audible. "That's... just the thing. The reason why I need you to do it is, well, is because the book is kinda... u-underneath me."

"Underneath you?" Fluttershy flinched into herself once more as she looked to the door. “Like, underneath you, underneath you.”

Twilight clenched her eyes. “Now you see why I can't have the princess doing this. I-I feel bad even asking you to do it."

What is there to feel bad about? Fluttershy blushed and shook such a thought from her mind. Tucking her lips into her mouth, she nibbled on them, daintily approaching the door. "You... you don't mind me seeing?"

"I do," Twilight's voice thundered that last word. "I just feel bad subjecting you to see... well, there."

Fluttershy's brows knitted. It wasn't a boundary born from permission... but something else. More questions arose, but a mental string wrapped and silenced them. The mare set her hoof on the warmed wood of the door. Leaning close, she sniffed, a burning, wispy musk ingrained with timber.

Oh, dear, Is she excited? Or is there just more to her now?

Twilight watched nervously from above as Fluttershy opened and disappeared through the door, who closed it behind her, sauntering into the remains of her living room. Her jaw and ears lowered at the view ahead.

Twilight's pussy. Long and curved and arching all so high above. Thickly mounds sprouting from its sides like gates of squish to the denied paradise. The air baked in musk. Hot, with the scent of a preheated book. Fluttershy didn't know why that made sense—only that it did.

She looked left and right to where cottage walls had once been. Now the voluptuous thighs bubbled in the space, connected to the dock of the wide hips. The crotch tucked between them hung in the air like some kind of temple.

A holy, devouring place that swallowed its devotees whole.

"I, uh, um, s-sorry for the view."

The voice both boomed from above, and whispered in Fluttershy's ear. She glanced at her right to see an intermittent, lavender glow from within it. "T-Twilight?"

"Y-Yeah. I can hear you. This spell should allow us to keep in communication with each other." Outside, a tremor broke, the sound of sand being pushed roaring like a waterfall. Is she pawing the hill outside with a hoof? "Not that you need any help hearing me, at least. Have you, uh, seen it?"

"Your... delicates?"

"W-Wha—N-NO NOO-OO! NO-NOO-NO-NO-NOOOO!" Thunder broke, and trees snapped and the air tensed in the quakes of the giantess. She thumped on her rump, raising and dropping the cottage worn like a skirt. Her bottom arched forward—looming over the fallen Fluttershy. "Of course you've seen that! Hard not to, right? It's... pretty big! And weird! And probably disgusting at this size.”

Fluttershy laid on her side, looking up, recoiling at the monstrous lips only a few feet away. They were enormous and interpersonal. Shaking hips had knocked a droplet loose from them. The batch fell and smacked and splashed Fluttershy harder into the wooden floor.

Her fur absorbed the spice as her nostrils burned in the rich perfume.

And only one thing bothered her.

Twilight thinks she's disgusting?

"...probably disgusting at normal size too, but—BUT NOT OF THAT MATTERS, OF COURSE!" Twilight laughed, and the house rumbled. Then she cleared her throat, and everything settled. "D-Do your best to ignore it. Though it might smell down there. I, um, n-nothing I can do about that. Do your best to ignore that too?"

T-Twilight?

Fluttershy shook her head and rose to her hooves, fighting through the added weight of the glob of cum and its growing attachment to the floor. Freed from its excess, she looked around the immediate area. Half of her table slanted upward as the other half disintegrated beneath the start of the thigh.

Am I going to have to crawl underneath her leg? I don't think she'll be able to lift it very much, though being pinned underneath it might not be such a bad thing.

"Twilight?"

"Mm-hmm?"

"Were you reading the scroll book on the living room couch?"

"I was... why?"

"Is there a chance... it could be underneath your thigh?"

"I don't think so." Silence hung in the air for a moment. The purple, encompassing hips inched backward, freeing the area a touch. "The book was thrown toward the kitchen when I started to grow. It should be around there."

Fluttershy's eyes dropped from Twilight's crotch, following the innermost curve, blushing at the view of the squished cheeks. Scrunched from immense weight, they remained as fuzzy, lavender dunes that snuggled together, creating a rich, dark cleft between them.

Fluttershy swallowed. "Twilight?"

"Yes?"

"Before the book was 'thrown' to the kitchen... where had it landed first?"

"...okay. Maybe I threw it over my shoulder." Twilight choked. "I was shocked! I just tossed it, and it, maybe, it landed on my back." Her sprawling belly tightened and expanded quickly with her racing breath above. "But I'm pretty sure I bucked it from there! I sat down on it as I grew to ensure it didn't get lost or torn or anything like that! It should still be right under me... r-right?”

Fluttershy lips wavered as she stepped forward. The purple elevator above clenched at sensing the itty-pony. Fumes exhausted from between the overhead lips, clouds descending and dispersing across the floor, spilling into the scattered cushions, with a linger of wisps cast across the space.

The pussy breathed again, as Fluttershy stood beneath it, who looked up at the living cavern, coming to see an emergence from within the depths of the slit. Swollen folds grew outward, crinkling into the open. Lazily, the rolling tides split from the other, falling and leaning to their respective mound.

And the tiny mare could see deeply into the awaiting cunny.

Dimmed with a hint of pink, the interior behind the lips lounged like a pocket, a tall and thin sac, with a hole undulating below. It opened, unswirling flex by flex, at first matching the size of the pegasus—then growing well beyond her.

Roll into me.

The words floated into her mind on their own as the adventure gazed highly into the awaiting trap.

Drop your hips to the ground and gobble me with your lips. Ensnare me deep into your being and tuck me into a place I'll never escape. Just how deep do you go? I want to see what the center of inside you looks like.

Fluttershy cast aside her repressions and stood taller on her separated forelegs. Twilight needed her. To find this book and reverse this growth before the rest of the world saw that which she felt ashamed about. Passing beneath the quivering cunt to the cove underneath it. Squish poured from the flanks and the beginning of the thighs, composing the place.

"W-Wher—"

"Directly underneath you." Fluttershy laid a hoof on a clump of the wall, feeling it sink into the softness before it squeezed. The clove closed instinctively. A yelp reverberated through the dips and rises of the walls. The encroaching purple pulsated inward, narrowing Fluttershy into a squishy, violet cavity.

Everything tightened with the shock of the giantess before the flesh relaxed, expanding outward, relieving and releasing the little one. Fluttershy had been hugged at her sides by heated squish. Now free, she looked forward to the long, narrow divide between the mountainous flanks.

An itty mare directly underneath a titan.

"When you sat on the book, I think it slipped between you... y'know." Fluttershy lowered to the floor to scan for hints. But the flanks thinned across the whole of the space, layering purple across the floor. "Can you lift your left flank?"

"Uh-hh-hh," the creamy outstretch peeled from the floor, layers and layers of fat, rising to the groaning across the wood. It was dark beneath the rump. Flattened debris, wrapped in fuzzy tangles, were decorated across the great sphere. Pieces of plates and teacups. "See anything?"

Fluttershy laid on her stomach and chest and felt something roll into her side. She glanced down to see a flashlight. Cradling it between her hooves, she felt it warmed by Twilight's ass. Clicking on the switch, she shone the light in the shadow cast beneath the heap of the raised flank. A blush spread across her snout.

Nothing but destruction remained in the spread of space.

"N-Nothing! Now your right!"

The blush worsened as the ceiling rolled back onto the ground, occupying greatness in seconds. The cheek squished and nuzzled and rested back into place. Groaned bellowed from the cottage as debris poured. The flashlight illuminated the darkness, revealing the wood waterfall grounded into dust. It drizzled from across the overhead dune, a couple of cracked, wooden shelves smothered and stuck to the fuzzy ceiling like a licked envelope.

"I'm going to crawl underneath you now, okay?"

"Y-You're going to crawl underneath my butt—I MEAN MY RUMP!" Twilight's laughter rocked across the ceiling as its vibrations pounded into the ground. Fluttershy meeped at the massiveness smudging around the confines. "A-Are you sure it's safe? And, like, not degrading?"

I would die if you sat on me and overjoyed to be stuck to your rump as you walked, and I would cheer every time your hindquarters swayed, and I would raise my forelegs in excitement when you went to sit down again and—

"I don't mind," Fluttershy crawled forward, entering a bubble of lingering, personal warmth, with a toasty flooring that drew her hooves across it. In every iteration, the ceiling grew close, its thickness nearing the ground. It wasn't the shifting of the mare, which caused the roof to bob from side to side, but the natural fatness of the rump. It was close enough to touch. "Just... remember that I'm down here."

Please forget and sit how you normally would. Rub your rump into my home like a cushion you're making into the shape of your rear.

Fluttershy finally rolled onto her back as the bars of the oven spread across her back. Her hair pooled around her head as she stared to the ceiling. She'd reached the section just before the thickest portion of the cheek. The place she could hug and squeeze and bury herself into and be deflected by the natural bubble of the ass's softness.

Together for a year... and not once have I touched it... maybe because she was scared... or somehow disgusted by what she had. Would she... would she mind if I touched it now? Would she even feel it? One touch, a little squeeze, something to hold me back, a memory to retain for later...

Her hoof rose for the arch of the overhead garden, the softness fur over the smoothed skin layered over the squishiest softness. To feel perfection even for a moment. But Fluttershy sighed. Even in drinking in the waves of heat washed across the ground from the cunt afar, the mare couldn't betray the trust of her love.

I could never forgive myself.

Her eyes fell to the side.

And it would taint the sensation forever.

Fluttershy flipped onto her stomach and shone the light beneath the cheek, seeing the bottom of the wall that once separated the kitchen. The cheek rolled onto where tiles began and most likely blew out that room. Was her counter and sink blasted somewhere into her backyard? Or was it all crunched in the width beneath the rump?

It doesn't matter. If Twilight had sat on the book immediately, it should have wound up somewhere here. It didn't bounce off her... though I certainly would like to be. She, massive and bent forward and looking back at me. Little ol' me, standing on her purple hill, feeling it clench then bounce, tossing me to her other cheek, which would bounce me back, over and over and... aw, shoot.

"The book isn't outside, is it, Twilight?"

"...no," the voice buzzed. "I faintly detected magical embers on it. It's underneath me. It has to be.” Fluttershy shut her eyes and exhaled a smile. Shaking her head and retreating to the middle beneath the rump, she started up at the purple, divided ceiling. "It's not anywhere?"

"I think I know where it is," Fluttershy started while wiggling closer to the squished cheek, aligning herself with the darkly cleft. "But it's going to involve you sitting down."

"But you're still underneath me!"

"Exactly."

"Fluttershy, I... I can't just sit on you." Twilight quivered. Tonnes of tush wobbled, peeling from the ground, starting to hang and expand in a droop of squishiness. Distant walls croaked. Movement ceased as the encompassing plot hung. "And I can't wreck your home either! I-I guess... fine! Fine! Forget! Do it! Go get the princess. Go get everyone! Go get a whole crew of ponies to try to extract my fat butt from your cottage and another slew of ponies to repair all the damage my oversized rump did."

She scoffed, and wind sliced from ears dropping. "Rainbow can have a laugh as she flies around it. Rarity can drop a quip while making a dress for me. The princess can get to see what the underside of her student's bottom looks like before she shrinks me! Hopefully, she shrinks me to the point that nopony can even see me after this!"

I wouldn't mind cradling a tiny Twilight Sparkle and having her lounge in my hair or keep her safe inside of me. Oo-ooh! A tiny Twilight Sparkle safe inside my pussy! We could have so much fu—STOP! You horrible pony! Stop, and speak!

"But I wouldn't want that," Fluttershy spoke up to the hovering butt, speaking to it as though it were her marefriend. "I wouldn't want a world where I couldn't see you. Where I couldn't be with you. And I certainly don't want you to be embarrassed. Not because of me—not because of anypony."

"It's not you! Not them! It's me. It's my body. It's my—"

"But I love your body."

"It's my... wait, what?" Twilight choked a breath. "You love me? Like, me me.”

"Of course I do."

The posterior shuffled in the air, waggling to Twilight's nervousness, flank compressing into flank as they slid and dipped into the other. Twilight cleared her throat. "But not like... b-but I mean... I'm... I'm not anything special. Certainly smart! Very capable. Talented, maybe, in a few things. But I'm not you. Not Rarity. Even Rainbow... is still Rainbow."

"But I don't want them." Fluttershy blushed. “I want you.”

"For a marefriend, maybe! To snuggle on the couch and read a book together and maybe have a sip of wine... to softly talk about things and be able to relax in the s-silence but... when it comes to the... the other stuff. I-I... I'm not pretty. I'm not—"

"But you're very pretty, Twilight."

"I'm not sexy! I have a fat rump! Not the good kind of fat, either! It's not... pronounced, like Rarity's. Not toned like Rainbow's. Applejack is just a powerhouse with muscle! Pinkie jiggles and wobbles, and you... well, you're a former supermodel!”

I have to tell her.

"Twilight... do you mind if I tell you something?" Fluttershy shook her head as the end to the lies were nigh. "A lot of somethings, actually? Things so terrible and disgusting and wrong and overly perverse?"

Twilight's silence was answer enough.

"I have stared at your rump more than any mare on a street or a magazine." The embarrassing words tumbled freely and proudly. "I check it when you're curled next to me, and we're reading a book. Or I'll glance at it from the hallway when you're in the kitchen. I FANTASIZE INSTEAD when I can't look at your butt. Like how I wish you would drape your chest over the armrest of the couch. That way, I could perch a book on the back of your legs and lean it against your tush. I'd be snuggled between your legs as I read from your rump."

The ass above stopped moving.

"It feels horribly wrong and abusive and demeaning, especially since we've never touched there in our relationship—but I can't help it. You're so round, warm, and big. Like you're towing a waggon, and I just can't ignore it. I wish I could feel my hooves all over those spheres and mount you from behind and just have my way with your backside."

Fluttershy swallowed. "That is... if it would be okay with you. But I don't know if it's okay with you. I never asked, even though I should have. Then you asked me to crawl underneath you, and I nearly wanted your... y-you to devour me whole. Then I had to crawl with your gigantic butt, and now all my dreams have come true. It's even more perfect now that it's bigger... I couldn't care whatever you chose to do."

Her head slid on the floor. "Sit on me. Stick me to it. Wedge me deep inside of it. Wiggle it into me as you read a book. Bounce on me as you enjoy yourself. I couldn't care. I love it all. And I love you more. Because you're Twilight Sparkle. And I love everything that makes Twilight Sparkle, Twilight Sparkle.”

Silence hung thicker than the suspended tankers.

"F-Fluttershy?"

"Yes?"

"Is that... is that your way... o-of asking me to sit on you?"

"Book or not, I don't care."

"You... you really are a swell marefriend." Twilight gasped. "Gah! I should have more to say! Like how I love you too! And you're, like, gorgeous. Always gorgeous. And I thought I was just weighing you down and—"

“Please weigh me down, Twilight.”

"J-Joke! That was a joke! No, wait, scratch that, a flirt! The Fluttershy just flirted with me!"

Fluttershy licked her lips and gazed above. "Call it a request."

"T-Then... alright! Okay! Let's do it! Let's really do it now!" Twilight cleared her throat, squatting in the awkward spacing. Her thighs must have burned from heaving those domes for so long. "I'm just going to take a seat here and sit on my marefriend! Going to squish her underneath my great big bum—and that'll be that!"

"A-Actually," Fluttershy interjected, "you'll have to make sure you sit on me directly. The book is most likely tucked deeply between your flanks. Since they haven't stopped being tightly sandwiched together, it should still be there."

"All-lright! Change of plans! Time to aim my rump exactly so I shoot my marefriend deeply between my flanks! And then feel her fight and wiggle up through my butt! And that... that shouldn't be a sentence I enjoy to say! But... but I'm enjoying it!"

Twilight whimpered, and the sound pounded on the outside walls. "Are you sure you want to do this? Isn't it, like, disgusting?"

"Your rump is anything but."

"Still! You're going to be crawling up my backside! Like, not crawling over them, but wedged between them! What if... what if it tickles? What if I clench and squeeze you by accident! What if you go in too deeply and it becomes too tight and you're trapped in the depths of my rump! I might take a nap and roll around!"

"All of that sounds lovely, really."

"So you... really want to crawl inside my plot?"

"Yes."

"Well... a-alright then!" Twilight chuckled. And then she laughed. Warmth and love seemed to tingle through the skin beneath her coat. "Get ready! Great big Twilight Sparkle is going to set her enormous rump on you! It must be, like, everything to you now! So big and wide and round and massive. Get a good look at it while you can—because you might be seeing only the inside of it for a while."

The rump above shook as it lowered. Fluttershy meeped at her dream being achieved. The floor was absorbed in seconds as the purple butt thudded against the ground. The speck of yellow disappeared beneath the mass. Fissures spread throughout the floor as the cheeks once again consumed the area. Nothing but them remained. The large, flattening orbs became warm, lavender-coated dunes.

Fluttershy had watched the backside drop as the soft wrecking balls demolished the ground to her sides. That sprawling line spread over her form and barrelled her through grinding fatness as violet layers settled as her hammock.

Everyone froze and went silent. Groaning from the wood came below from the weights set against it. The cheeks, bunch tight, expelled flabs of squish that rested against the glutes of the other. Fluttershy breathed within the violet hue. It was dark, and the smell was of a delicious, sweaty Twilight Sparkle.

I'm at home!

Fluttershy returned to consciousness within the snug valley. Undulating heat became the first sensation. The second was how the globes rose and dropped and shifted into each other, with rounded planes of fluffy gardens brushing and interlining.

The immense, soft pressure, had pinned her in a crevice, a weight pushing into her chest and another weighing onto her back. The pressure was tight... and only became tighter deeper within. The twins ground her up and down as though bobbing in water.

"F-Fluttershy?" the voice buzzed in the valley that clenched. "Are you, uh, safe in there?"

Fluttershy purred and turned her head, the buoyant force expanding against her cheek, forcing it into the arched, sprawling one of her love. She sunk into a crop of silky fur, which flattened around her face, as the fat of the ass impressed like a pillow. A dense layer still remained—and the globe of muscles behind that. "More than just safe."

"That's great! Perfect, in fact! Good to know that my marefriend is comfortable with being shoved up my butt!" Twilight chuckled, and a wobble clapped through her cheeks, a vice grip consuming then releasing the mare. "Not shoved, because you're not in my—not gonna think of that. Not at all."

The cheeks clenched again. What had been a slit of space, now, transitioned into total compression. Only purple morphed into itty-yellow. It squeezed Fluttershy to the extreme. Then released. The walls loosened and relaxed. Were those on purpose? Or the results of Fluttershy's tickles?

"But with that being said, there is an objective for you there." Twilight coughed. "I mean. A new one could have appeared. Considering, y'know, all that you said. Uh... take your time with that. Do whatever you like. I-I never... expected my ass to have an impact on anyone."

She hummed. "It feels kinda good. Beyond, ah, having a pony shoved in there. Especially a pony like you. So... let me know! Know, uh, if there's anything I can do! Because me, and this butt, are here to work for you!"

Fluttershy giggled as she rolled within the hospitable cave, through the thatches of fuzz and across the creamy skin, held loosely enough to swim in the tush. However, she looked up, seeing the slit that thinned deeper into the derriere.

"As lovely as it is... to be here..." Fluttershy started with a pant, tickled everywhere with a pleasant burn; her own lips swelled, a heat escaping. "It's probably best we get you back to normal before anypony else sees this. You do know of a shrinking spell, right?"

"Only for a normal pony, not under any other magical influence, sure."

"Perfect."

"Why would that be perfect? That would only make sense if... oh." Fluttershy giggled. Twilight always remained two steps ahead of anything. Seeing the reverse tickled her cutely. "Y-You mean... still, after this?"

"Even better after this."

"How come?"

"Because you won't have to hold back," Fluttershy started as her hooves thrust into the cleft, a baking temperature washing over her arms. She parted the walls the best she could, coming to wiggle into the created space. "And there's a lot more we could do."

It didn't take long for Fluttershy, on creating space and kicking her legs through clinging tush, to capture something wedged above. Locked in a line, she tried to widen the area, but her hooves pressed on the overhead clumps, unable to fit. It was tightest here. Inches of space to move around it—inches she had to wiggle and fight for.

Fluttershy lounged upside-down in the pocket, spreading her legs within the place. The ceiling drooped onto her face like the underside of a breast. All while the gigantic mare hummed and moaned at the tickles of a wiggly-pegasus lodged in her bum.

"Twilight, I need you to do me a favour."

"Sure! What is it?"

"I need you to spread your butt a little."

"Come again?"

"I think I see the book. Problem is, it's pretty wedged in here. We're pretty far up your rump. After this next section, I think I'll be able to see your—"

"Whoa, whoa! Gotcha, gotcha! Sheesh! When did you get so bold?”

"When I saw and wanted to jump inside you—"

"Kay! Kay! I-I'll find a way to... spread my flanks here." She cleared her throat. "Just a little bit, though, alright? Don't want you falling out."

Fluttershy chuckled. She inched forward, her soles closer to the book, as she leaned forward, ready to catch it. "Not if I get to climb back in."

"Yeeesh! You really love my butt.”

"Twilight."

"Right! Ready! Back splits, coming in now."

The walls jostled, rocking the pocket and the mare, stabilising as the hips beyond shifted. Without hooves or magic, the giantess was forced to squat, moving her flanks to part. It must have looked awkward. Twilight, no doubt, looked down her back to the rump half involved with the home. Knowing, somewhere in there, her little marefriend was lodged in her innermost temple.

The space opened as the tushy concentration shifted away for a second, the flanks coming to part. The book fell from its shelf and onto Fluttershy's chest. Cradling it, the mare tucked in her legs. She entered a free fall inside the rump, grazing and sometimes bouncing off the walls, seeing the long, broad line revealing a wooden floor before.

Fluttershy escaped the barrier of the butt and, with a mighty flap of her wings, daintily settled her hooves onto the ground. She smiled, looking up, taking a moment to admire the squatting derriere. Part of her wished to lie down and look at it. Watched how it wiggled, swinging from side to side, the idle movements of hips holding such immensities.

Admire them once she's dropped you into her underwear.

Fluttershy cantered forward more happily than she should have. Turning around and looking up at the landmark, she admired the massive pussy full-on glistened in juices. She was going to go for the door... when she realised that Twilight wouldn't be able to read the book, anyway.

"Uh, Fluttershy," the voice came in more clearly now. Fluttershy looked up to see an opening in the ceiling. There, Twilight's face loomed. The giantess looked down at her. "Oh, good! You've escaped! Did you get the book?"

"Yup!" Fluttershy held it out with a wing. "I'll read through it now, and see what it has to say about a reversal spell."

"That's good... that's good... say, ah, are you going to read it in there?" Twilight's sheepish smile extended beyond the frame. "Because, uh, my you-know-what is kinda in the room with you. And... I've been feeling things because of you. It might smell in there. B-Be careful about slipping! The floor might be wet. For reasons. Causes caused by me."

Fluttershy smiled and, lowering onto her stomach, splashed into a puddle of something special. She held out the book in one wing while the other flipped through the pages. Ahead, the massive rear stomped onto the ground, a solid thud rocking the space. The cunt lowered closer to the ground, like a gate, a door she could now access and enter.

"Okay, then! Just gonna read in a living room with that there." Twilight hummed in thought. "Actually, after you've had your fun being shrunk, do you mind if I try it after? I have a few reading places on... in you that I'd like to try."

Fluttershy nodded. "Most certainly."

Fluttershy flipped through the pages and eventually stumbled on the crumbled corners of a section. This is it! The text spoke of a spell born from the power of a feeling or a desire. The expansion from that would give an expansion to one's flesh.

Whatever one had filled themselves with would then have to be released for the effects to be reversed.

"The book says the energy derived from your desire is the conduit to expand your size." Fluttershy glanced over the rim of the book to the pussy crashing into the flooring, captured between flanking thighs. Her head shook away from the pleasurable curse and to the face beyond the ceiling. "Was anything going through your head when you were practising the spell? Consciously, subconsciously?"

Twilight swallowed her lips and looked idly elsewhere in the sky. Her blush radiated like a scarlet sun. She inhaled through her mouth, fighting her internal panic to speak.

"I'd, um, I'd been... well, I'd stopped focusing on the spell, then I thought..." Her head shook, and the veil of her bangs flew in the sky; her eyes glared downward at the itty-mare. "Gah! Is it important? What's the counterspell?"

"There is none."

"So I'm stuck like this!?"

"There’s a way to reverse it," Fluttershy dipped, watching the massive pussy, its hotness, largeness, how it slowly opened and sealed, winking, taking a liking to her. It was a maw of a monster; A horny predator lazily sniffing its prey. It drooled sweetly in its desire for consumption. "It's a matter of relieving whatever you had wished for."

And I think I know what it was...

"I-I-It is! O-Oh, Celestia, it is! Hehehe! Great! Great."

"What was your wish, Twilight?"

"It..."

"I already confessed myself to you... can you trust in me to do the same?"

"I! I-I... I was thinking about you! Always about you! I don’t usually fantasize. But I was thinking about you." Twilight’s hips shifted and thudded on the floor, which groaned. "How it would be nice... to be a little closer. But I didn't want to force you into anything. Or force you.... to deal with the most disgusting parts of me."

"Nonsense."

Fluttershy cast the book aside and strolled forward, without shame and full of love, walking through the heatwave. It tickled and nipped like the sand of a summer beach. The base of the pussy squished into the ground, condensing into a plush, bulky layer. Raising onto her back legs, Fluttershy hugged the lips, collecting and falling onto the squish, nuzzling the heated folds, which greased her face.

"B-Bah! F-Fluttershy! Are you... h-hugging me, there, r-right now?”

"Yes."

"But that... it's... I-I haven't trimmed down there, and that's my—y'know."

"And that’s why I love it even more." Fluttershy flushed her face into the lips and lingered a gaze upward. The mounds curved the same direction, filling outward and obscuring the view. With a starting flap from her wings, she the arc of the mound, buzzing the sensitivities with delight. "I would canter in your deepest fuzz like it was a garden. Smell its thickest locks like they were the sweetest flowers. You’re all natural, Twilight, and that captures and seals the best smells of you. If I wasn’t driven to lust before reaching your waist, once I passed through your forest, my only thought would be wiggling inside between your legs.”

She chuckled. “And that’s why I never ask you to change a thing about you. You’re perfect as you are. That only applies to a few, and I’m glad it applies to you.”

The powerhouses tucked inward, and a wall of purple chub settled into the pegasus’s back, the thighs, starting to shift and rub, and ground the little one into the large, sensitive thing. The clit peeked at the top of the slit, uneclipsed from its hood, round, and pink, and shiny. Touching it sent tremors across the accompanying legs. Each thigh raised and dropped and rumbled on the ground.

"Sorry! I’ll move my legs, but—”

"You don't have to do anything," Fluttershy closed her eyes, the orb becoming snug between her forelegs. She kissed the living sphere, feeling the accompanying broad hips, thrust her with the force of a flung apartment building. She held long enough to withstand the momentum—then released herself, sliding in the squeeze between thighs and folds. "I just want to help you with this. Will you allow me to help you with that?"

"Wait. Does that mean going inside of me? Are you crazy?! I can't be responsible for what goes on in there! What it might look like... what it might u-unconsciously do to you! You already crawled inside my butt! Now you're going to tuck yourself away inside my insides!? Are you sure about this? Have you really thought this through?"

Fluttershy slowed before and below the base of the pussy, which rose from the floor on its own, its thick lips, bending away, revealing the dimness of the tall cunny. Burrowed in the darkness, there, flexed an opening, small and round, breathing in twitches, showing the beating tunnel that stretched into darkness."There's nothing I would like more."

Shyness nestled in Twilight's voice. "And you promise it won’t be disgusting?"

"I promise."

“You sure? Most ponies would find it disgusting."

“Does that matter? It's not disgusting to me. I don’t find an inch of you, inside or out, to be ugly. You’re pretty. Beautiful in all things. Nothing about you can ever disgust me.” Fluttershy’s chuckles immersed themselves in her streak of assertiveness. It revealed itself only in Twilight’s presence. It was Twilight’s acceptance of her… that allowed Fluttershy to be everything she hid beneath the surface. "Or maybe it's because I'm a disgusting mare."

“You are anything but.”

Fluttershy chided. "Same to you, Twilight Sparkle."

She wedged through the folds, wiggling her hips through their thickness, feeling the layers tucked inward, settling against her flanks. The previous slipped her through. Falling inside the hot pocket, all was dark as heat blew upward. The ground caved beneath her weight. A sauna of musk.

A heatwave passed through her. Sagged into the bottom of the pocket, directions went only two ways, but it was like walking on a waterbed in the dark, here. She stumbled, and fell around in the slack enclosure.

Suddenly, a blue ball twirled and burned to life, casting a glow and floating next to Fluttershy’s confused muzzle.

"Uh, here." Twilight coughed. "To see better."

Thank you for trusting me.

The cavern lit in the cast of blue glow. The inward curve of the pocket, a thin texture of skin, developed and disappeared at a hole flexing opening. It was small, and just big enough to engulf a pony. Standing as flooring sagged beneath her hooves, Fluttershy leaned toward the gnawing entrance, feeding her forearms into the maw. Softness nibbled and pulled her wrists, a gasp washing upward as the overhead belly filled outward.

"Gah! I feel you! I feel you.” A sharp inhale through the nostrils. “You're... you're... ooo-oooh...”

Fluttershy let herself be taken. It was nice... to be sipped.

The suction licked from her wrists licked to her elbows, swallowing them inward, the mare lowering her head as it was slurped next inside the pocket. Her mane was glued to her neck as flesh compressed into her chest and back. Each undulation took more of Fluttershy, gulping her shoulders and finishing at her haunches.

Fluttershy’s back legs kicked weakly into the air, hanging out from the hungry hole, until they flexed forward and froze, sucked next like strings through lips. The pussy’s maw swallowed the wiggly mare with a sag and a little burp. Then it sealed itself shut to deny escape. Inside, the tight, fleshy tube held, drenched in drooling lube, swishing the treat from side to side, carrying the mare into the depths of the living cunt.

"You're inside of me! I-I... can't believe it! Our first time, and you're in me.” Twilight's hyperventilation caused the walls to contract into a squeeze, one that bunched the butterscotch mare, flattening her chest and flanks into the tunnel’s total compression, beating into her with its kneading pulse. "How is it? Disgusting… or actually amazing?" She chuckled. "W-What about sounds? Does it sound like everything is sloshing around? Can you hear my breathing? Or my heartbeat? How about my voice? Does it sound better inside or outside me?”

"Kqek! T-Twi...light..." Fluttershy breathed through the squeeze. "...p...lease... l-loosen... u-up!"

"Oh! Right! Sorry." Twilight slowly inhaled and exhaled through her lips, the relaxation loosening the tunnel. It returned to its narrow crawl, a foot of space sagging around the tiny.. Twilight’s personal length, and its constant undulations, chugged the little one ever inward. "That better?"

"Very," Fluttershy answered. "And it's very beautiful inside you. Your flesh is soft, smooth, and squishy. The vines of white are, w-well, they’re nice. Strewn across your flexing walls and sometimes collapsing into pools on the shivering floor. Everything here is closing in on me. I don't know how deep inside of you I am... b-but I only want to go deeper."

"Careful! CAREFUL! Go too deep, and I might not be able to pull you out!” Twilight chuckled on abated arousal. "You can try going as deep as you like another and—UGH! Did I really just say that?"

Fluttershy smiled at whatever depth she had descended inside the giantess, knowing herself to be so far between those massive, splayed legs, and so far behind those gigantic thighs. Twilight’s mountainous rump, somewhere below, and the slender tower of her chest, rocketing slenderly above.

She hugged the pink clump of pink composing the ground, the canal squeezing her in response. Fluttershy held the slippery foundation as undulations, much like wavy water, carried across it. She nuzzled and kissed the ground, feeling a bump in the ground beneath her hips.

"Fluttershy! I think you found my—OOO-OOOH... m-hm-mmm.”

Fluttershy splashed her face into the juices, nuzzling the flesh beneath. She didn’t care about being inside another girl, lodged and trapped inside her pussy, a place expected to be of domination and humiliation. Nothing but love around her. Constant warmth and hugs and goodness. Vacuums of wind collected and discharged from distant lungs; a primal, beating heart settled a peaceful tempo inside the temple. The undulation of the walls beat in a steady rhythm.

"I love you, Twilight Sparkle," Fluttershy said from within her marefriend, a mane slicked to her neck. She kissed the fleshy foundation, nibbling its flesh. "I love how you look, inside and out. The way you feel around me. Always so big and strong and powerful. I feel like nothing can go wrong if I'm inside of you. No villain can hurt me while I'm in here—not when I have all of you to guard me."

Her hips felt and nuzzled and straddled the bump, which she rubbed her crotch over, feeling her folds part from its intrusion, how the burning surface licked her clit with its firmness. Thrusting her pussy across the sphere, she added raising and dropping her hips into it.

"Your flanks to cushion any fall,” Fluttershy began as she humped the spot silly. “Me, in the center of your being, falling along with you—only for the bigness of your rump to cushion and protect me from the impact. Your full body, all of your weight, all around me as you fell. My… s-such a delightful thought!”

Fluttershy moaned as she sunk fully, increasing the speed of her backside, fucking the G-Spot like a horny dog. “Your thighs to block the passage into my home—no invader could ever find me here with them there. No villain would think to inspect their prisoner, there, for me. Heheh… m-mabe… I could sneak out… and help… afterward!”

Fluttershy’s tongue lolled over her lips as the fleshy cavern opened and closed, breathing, with her tucked in its middle. “I would be able to feel the sway of your walk from between your legs. Hear your voice rumbling off the walls as you speak to others. Knowing I'm inside the body behind that beautiful face; to have your amazing personality as constant company. I could be with you, forever, like that.”

She chuckled and arched her back, smushing her head into the ceiling, raising its pouch-like nature. Fluttershy looked back and across her barrel, seeing her rump flagged in the air. She dropped it on the mound, straddling it, grinding the bump to oblivion.

"Nngh!"

Twilight didn't fare better. Her magic found her clit as the place sealed in bliss.

The hips that encompassed the place, sprawling to the sides well beyond it, started to gyrate. Rolling with it, the tunnel felt like a rowboat, raising and dropping to the giantess's ministrations. More slime pooled from the walls. Falling in vines from the constant shaking and pooled across the canal. Fluttershy's dropping bottom splashed into the boiling current.

"Y-You're... inside of me... s-so deep inside my pussy that... that... that I never want to let you out!" Twilight huffed through her words, moaning between them, like a cute and inexperienced lover. "Perfect, u-unattainable Fluttershy. Lodged deeply inside of me. B-Behind my pussy as I s-stroke it furiously."

Fluttershy whimpered as the ceiling and flooring caved together, sandwiching her between living bliss, allowing only the thrusts of her hindquarters. It was enough. The clench, and the words echoed throughout the walls, were enough.

"None would know you were inside of me." Twilight breathing hitched as an adorable gasp broke. "I could lay on my back and spread my legs, and none would know you were behind my lower lips. They could press a hoof into my lower belly and never feel you through all that squish. But I would know. Know that my body... was a t-temple to you."

Through Fluttershy's desire for her, Twilight found a love for her own body, another facet for lust to grow into. "And... I'd let you do anything. If you wanted, I would even swallow you. I'd let you crawl all over my rump and recline in my cunt and explore my body while I slept. You could be pinned against my thighs from inside my sock or travel to both sides of my underwear while I walked. You can do whatever you like with me, Fluttershy. I'll keep you inside of me for as long as you could ever possibly want."

That was enough as the itch building in them both reached its apex. An expanding, rising bubble, flushing bliss from the center of their crotches. Torrents of cream released from them both. Milk built in the beating burrow and rose to Fluttershy’s chest. Twilight’s scream of release drowned her in every way possible.

Submerged in honey, the current washed Fluttershy outward, and she rode it idly. The tide flushed through the narrowing and dark tunnel, through a fleshy opening of light and oxygen. The wave carried her into the air and smacked her into the flooring—a white, subsequent downpour, drenching and weighing the mare.

An effect occurred around her.

Fluttershy's muzzle dropped onto the wood. The staggering legs to the sides receded in length and size; the belly ahead compressed into itself. The purple, fluffy chest, sunk from the ceiling—sunlight pouring through the new opening. The giantess shrunk into a mare, one that rested on her rump, panting and breathing, idly stroking her groin.

Until her dull eyes settled forward.

"F-Fluttershy! You're outside! Outside of me, at least! Hurrah!”

Fluttershy rose to meet her friend—but dropped. She tiredly smiled upward through the slink of her mane. Twilight stood over her, and Fluttershy had but few words. "I wish not. I’d much rather be inside of you. Solving your problem… drained me.”

"Bad time for that." Twilight clopped around the setting, staring at the leg holes in the wall. Her thighs, those measly things, created those. Her hooves carved through the land beyond the openings. "It’ll be a few days before we can fix your house. Maybe fewer than that, if I use banned magic.”

Her eyes tossed to the limp Fluttershy. "You're rea-aally out of it, aren't you?"

Fluttershy's head twitched beneath the mess of pooled hair.

Twilight bit her lip. "Should I carry you to bed?”

"I... don't want to be away from you." Fluttershy exhaled. "At least, not for a while."

Twilight smiled. "I feel the same. But... it's not like I can carry you around like this... u-unless." Another nod from the limp mare, and then the two smiled. Twilight’s horn charged and cast a spell. The mess of mare dwindled and dwindled until the underside of Twilight's hoof dwarfed the small one.

Twilight approached the tiny and sat down, bouncing the miniature, scraping her into waiting hooves. Cradling Fluttershy against her cheek, she pulled her away to enveloped her in a kiss. The lips sunk over the tiny and spilled over the area, the weighty flesh dousing the place in love. Twilight chuckled as magic levitated Fluttershy.

Twilight rose and flicked aside her tail.

"You can rest here while I begin the estimations of your cottage," Twilight began as her magic pulled one of her flanks away, tucking the smaller mare between them before her cheeks closed. They wobbled together, blanketing the tinier girl, who peeked out from the top of their ‘Y’.

It was a soft, grinding hug that refused to let go.

"Though, once I sit down to work through the numbers, you'll have to go somewhere else." For the first time in her life, Twilight laughed, using her own body as a flirt. "Not that you'll mind."

The nuzzling she felt between her flanks was an answer enough, and she swung her hips, feeling the tonnes wobble into the tiny. She chuckled as she walked, in love with the motion, how her flanks compressed and spread into her marefriend, letting her see the world from within the crevice, caressed by the shapes comprising it.

A final thought emerged from the alicorn.

"Though... once you've had your fill of me... then it'll be my turn... to take your place."

Fluttershy nuzzled Twilight's butt sleepily.