You were smothered under a giant pony ass within the now pocket universe of a library. It was Fluttershy’s ass. The gentle giant gave you great warmth and softness as she covered you with her massive butt. The softness of her fur against your bare skin was a wonderful feeling. Combined with the feeling of her squishy soft flesh folding around you.

Your pony friends magically helped you to see from a third-person perspective, which allowed you to see six other great mountains of pony asses were also rising into the air, about the same size of Fluttershy’s ass.

Pinkie’s, Rarity’s. Applejack’s, Twilight’s, Celestia’s, and Rainbow Dash’s asses. You were not exactly sure who was the biggest among them since their growth was wildly fluctuating. Even Rainbow Dash was sometimes the biggest among them.

Fluttershy’s horn atop her head was glowing with bright pink magic. Her beautiful, pink butterfly cutie marks glowed with bright magic like that of her horn. She used her magic to slowly grow her body bigger and bigger. Her body maintained its proportions, even as her big yellow, soft buttery rump grew fatter and fatter. The others were doing the same as her.

The walls and ceiling of the room were so far away that you could barely see them now, they were only becoming harder and harder to see as the alicorns in the room kept increasing in size.

Your massive cock pushed back Fluttershy’s vast tide of flesh, standing tall and proud. Even as she slowly grew bigger and bigger, pressing down on you with greater and greater weight and pressure. Although, in reality, you were pushing back a very insignificant amount of her flesh, since her ass at this point was basically the size of a mountain.

While your dick was big, it was tiny for what was needed to give Fluttershy’s thick, meaty marehood a proper fucking. Nonetheless, her vagina was dripping profusely, dampening the floor under her with her thick creamy marecum.

You raised your arms to push against the vast tide of fat from Fluttershy’s rump. Her soft flesh conceded back from your applied pressure like soft dough. You paid homage to her ass, gently stroking her soft fur as it slipped through your fingers. She moaned deeply as you lovingly stroked her rump.

"Mmm, yes. Love Big Mama Fluttershy." she said lustfully.

She was currently about the size of the mountain that the city of Canterlot was situated on. Despite her increasing weight and size, you did not feel pain. In fact, the softness and warmth of her ass just seemed to get better the bigger she got.

Fluttershy moaned as the growth flowed through her. The cheeks of her ass wobbled about like a stormy ocean as more and more layers of squishy soft fat were pumped into it.

Alas, despite the wonderful feeling of Fluttershy’s ass, you were still lying upon a hard wooden floor.

Abruptly, Fluttershy stood up, you felt cold with the absence of Fluttershy's ass. Your body was wrapped in a golden glow, and you were unceremoniously lifted into the air. You did not panic. You trusted your big pony friends. You were levitated towards a great white mountain of a pony.

Rarity before you was lying down on her back. You were gently placed on her chest onto your feet, from there you could see her huge eyes looking down at you with a loving look. Rarity’s soft, warm fur kept your feet well warm. You even sank a good few inches into her soft fat.

“Hello darling.” she said softly.

“Hello Rarity.” you said, waving at her.

She waved back at you with a hoof. However this made a powerful gust of wind, and it subsequently knocked you over. A dark shadow then loomed over you. You looked up to see Fluttershy's massive rump slowly starting to descend toward you.

You reached your hands out to embrace the coming of her ass. When her giant rump came down to rest there was a loud meaty slap as she smacked against Rarity's chest.

You uttered a loud muffled moan into Fluttershy’s ass. You were now sandwiched between two massive mares. The warmth and softness you felt around you were staggering. Rarity was slightly not as soft since you were lying on her chest.

Rarity placed her hooves on Fluttershy’s cheeks, her hooves sank deeply into Fluttershy’s ass, creating deep craters as her hooves pushed down her thick layers of squishy soft fat. Rarity pushed her head between the great canyon gap between Fluttershy’s buttcheeks in order to access her huge, thick meaty marehood.

Like a mare possessed, Rarity sloppily slobbered on Fluttershy’s sex, she licked, kissed, and chewed on her plump, fleshy marehood. Fluttershy cried out in bliss, showering Rarity with torrents of her creamy marecum into her mouth.

Fluttershy returned the favor and dove her head between Rarity’s thick hind legs. The two giant mares ate each other out on top of you.

Fluttershy’s massive ass grinded back and forth against Rarity’s face. Fluttershy’s giant ass rubbed back and forth against you as she moved her hips back and forth. You sighed in bliss at the feeling. Rarity’s chest was acting like a soft, warm mattress, while Fluttershy’s ass was like an incredibly soft, heavy blanket rolling over you.

You then saw five small copies of the other mares magically materialize out of thin air from all around you.

On your right, Pinkie rested her head on your shoulder. Below her, Rainbow, rested her head on your chest. On your left, Applejack rested her head on your other shoulder. Below her was Twilight, who rested her head on your chest. And last, but not least, Celestia was sat down in front of you.

The long horns on their heads simply phased through Fluttershy’s ass above as if they were transparent. Makes sense, since all of you should be jelly under Fluttershy’s humongous ass under normal circumstances.

The mares simply stayed in position and did nothing and simply looked at you with loving eyes for a brief moment. Until Pinkie pushed upward. You were now face to face with Pinkie.

You stared into her beautiful, big blue eyes looking back at you with tender affection.

You reached your right hand out and placed it upon her mane. You lovingly stroked her mane, which made her giggle happily.

Pinkie closed her eyes and lowered her head toward yours with her lips perked for a kiss. You moaned in bliss as her plump lips made contact with yours. Her long tongue snaked its way into your mouth and made contact with your far smaller human tongue.

You and Pinkie moaned together in bliss as your tongues danced together in a tender display of human and pony love and unity. Her mouth tasted of sweet candy. You continued to stroke her mane while kissing her, enhancing this already tender moment even more.

Pinkie Pie abruptly pulled away. Before you could even voice your protest Applejack pressed her lips against yours. You moaned at the taste of Applejack’s sweet apple tasting mouth. While you kissed her, Pinkie Pie started to nuzzle your shoulder.

Even as you kissed Applejack you continued to pet Pinkie’s mane, making the mare sigh happily under your tender affection.

You moved your other hand now to Applejack’s mane and proceeded to pet her too. Applejack moaned softly as you pet her.

Applejack suddenly pulled away and then Pinkie Pie was upon you once more. Applejack decided to nuzzle your shoulder. Sometime after that, Applejack was back to kissing you again. And Pinkie Pie was back to nuzzling your shoulder.

Twilight, Rainbow, and Celestia now moved to your cock. Celestia lowered her head down to your balls, Twilight, and Rainbow came to the midsection of your long, thick cock.

Celestia kissed and licked your balls below, Twilight and Rainbow slowly licked your cock up and down. The two neglected your tip, leaving that for Fluttershy’s massive ass to love.

Fluttershy’s soft, buttery rump rubbed against your tip as she moved her hips back and forth against you. You were currently kissing Applejack at this point, and you had Celestia, Twilight, and Rainbow kissing and licking your cock.

You moaned aloud, feeling your release impending. This only encouraged the mares around you to redouble their efforts.

Several things happened at once.

Applejack pulled away and Pinkie Pie pressed her lips to yours, this time Pinkie Pie was much more forceful, she bypassed your human tongue, easily pushing it aside, and she drove her long tongue down your throat.

Twilight and Rainbow moved their heads up and down your cock at a much faster speed, rolling their soft tongues against your member. Celestia meanwhile lifted her right hoof and took hold of your lower cock and pumped your base with her soft hoof.

Fluttershy, moaning aloud, started to bounce her giant ass upon you. Her cheeks jiggling wildly about like a stormy ocean while she did so.

Rarity did two things at once first she teleported you and the others onto her right buttcheek. Next, she instantly turned around onto her back, and raised her ass high into the air to meet Fluttershy’s ass mid-bounce.

Fluttershy and Rarity slammed their mountainous asses against one another, slamming their heavy softness into you. You cried out, instantly cumming. You coated both mares asses with your thick, creamy cum. Once you came, the small versions of Twilight, Rainbow, Celestia, Applejack, and Pinkie faded out of existence.

The two alicorns sandwiching you between their massive asses started to rapidly grow in size. Like tidal waves their bodies expanded, the other mere mountain-sized alicorns were smothered under them. These alicorns joined you by teleporting themselves between Rarity and Fluttershy’s asses.

With your right hand, you pushed into Fluttershy’s squishy soft backside, her soft flesh conceding deeply from your applied pressure. You used your other hand to tenderly rub Rarity’s rump below you with long smooth strokes.

Twilight, Rainbow, Celestia, Applejack, and Pinkie did the same. They were, however, able to push much deeper than you with their hooves, and looked like asteroid craters. However, even they could only dig so far. The mass of their growing rumps was just too great.

Fluttershy’s and Rarity’s growth rapidly accelerated in speed to dangerous levels. Their bodies were now closing the distance to the expanding walls of the pocket universe.

With a loud bang, their bodies slammed against the pocket universe’s walls. The soft fat of their bodies started to be compressed deeply as their bulk pushed against them. The walls cracked like glass from under the pressure.

“Oh no! We are literally growing out of control” shouted Fluttershy.

“I think we can stop it!” shouted Rarity.

Rarity and Fluttershy repaired the walls, good as new. They both sighed in relief, as they were able to hold back the vast tide of their bodies pressing against the pocket universe.

“I think we have managed to contain ourselves.” said Rarity.

“Yeah. Hopefully, nothing happens to trigger another growth spurt.” said Fluttershy.

Unfortunately, you were in such a state of bliss that you came again upon Fluttershy’s ass. With that, the walls instantly shattered into magical dust. Fluttershy and Rarity slowed downtime, and made sure to grab every living thing in the galaxy and safely put them between their asses with teleportation.

The moment they returned time to normal they themselves became a galaxy each in terms of size. They destroyed literally everything in their path. Their growth did not seem to be stopping as they rapidly began to approach nearby galaxies. Fluttershy and Rarity slowed downtime again and teleported every living thing from the nearby galaxies between their asses for safety.

Unfortunately having the effect of trillions of sapient minded life, that love really big asses wasn't doing them any favors in stopping them from growing any slower. These aliens joined in on the worship of their backsides, they kissed, licked and kneaded their soft rumps with passion.

Fluttershy and Rarity slowed downtime, and literally pulled every living thing in the entire universe between their buttcheeks. Once they started time back to normal again, Fluttershy and Rarity destroyed the entire universe. And soon possibly another one since their rumps were pressing against the very walls of this universe and threatened to expand out into the very multiverse.

The walls of the universe did not last long under the pressure of Fluttershy and Rarity, they cracked like glass before ultimately shattering into cosmic dust. Rarity and Fluttershy expanded Into the multiverse and had to pull life out from entire universes nearby them and place the life between their cheeks.

The super cosmic alicorns were destroying the entire multiverse as they expanded. There became less and less universes in the multiverse, until there was literally nothing left but themselves and the life they sandwiched between their buttcheeks.

Rarity and Fluttershy soon destroyed another barrier, shattering it into cosmic dust. They were now in the Omniverse itself. The two pulled the life out of entire multiverses and placed them between their cheeks. They were expanding faster than ever before.

The very Omniverse soon became empty and the two super massive-alicorns were pushing against the very edge of existence. Their cheeks compressed deeply as they pushed against the great beyond. It soon gave way, but rather than shatter it simply just faded away out of existence.

Rarity and Fluttershy and every living thing in all of existence between their cheeks were now in a great empty plane of a pure white void of nothing.

However, Rarity and Fluttershy sensed a slight disturbance in the otherwise emptiness of the void – almost as if they were not alone.

They noticed, with their omniscient sight, that hidden energies were starting to compress into a single point. Great amounts of energy were being concentrated to create another Omniverse, to replace the one that they just destroyed.

The two smiled at one another, and split the singularity in half, sharing it between them. They swallowed the singularities with great enthusiasm, moaning at the delicious sweet, candy-like taste.

For a moment nothing happened until there was a loud explosive sound inside them. Quite literally big bangs were happening inside their bodies. The very forces of creation were fuelling the growth of their bodies. Fluttershy and Rarity expanded out into incomprehensible sizes.

Not only that, but they grew faster and faster since the big bangs inside their bodies were exploding with greater and greater velocity, each time they tried to recreate the Omniverse. The energy now just fueled the growth of Fluttershy and Rarity.

“I’ll make a new home for everyone.” said Fluttershy softly.

Fluttershy lit up her horn and created a tiny multiverse (at least in comparison to them) that was as big as the old Omniverse.

Rarity lit up her horn and magically crafted said multiverse to look very girly looking. The stars were bright pink or purple and in the shape of love hearts, and entire planets looked very artificial but livable. Massive, beautiful gardens in ancient greek architecture covered these planets. Statues of Rarity in seductive poses were dotted around, and there were giant mountains made out of diamond.

“Umm Rarity. I think they would like it the way it was.”

Fluttershy flashed her horn and made everything natural for each respective universe within the multiverse. Her brain was able to process information at an omnipotent level at this point, and she was easily able to make it look like what it used to look like. Fortunately, deep down Fluttershy was still herself and had not lost herself with her newfound powers.

Satisfied with her creation, Fluttershy teleported everyone back into their respective worlds and universes and restored things back to normal. Many beings protested, but also many were relieved to be no longer faced-sitted on by two hyper cosmic alicorns.

Rarity and Fluttershy pulled their asses back, and let you, Pinkie, Applejack, Twilight, Celestia, and Rainbow Dash float in the empty void between their massive butts.

Fluttershy and Rarity wrapped the tiny alicorns (in comparison to them) in a magical glow. Under their magic Pinkie, Applejack, Twilight, Celestia, and Rainbow Dash joined them in size. Now seven supermassive alicorns stood in the void.

The planet of Equus itself appeared in view before you. The seven alicorns combined their magic together and the planet in which Equestria stood on became so massive that it was able to fit them. You were now back in the much larger golden oaks library.

You were an insignificant, tiny spec lying on an absolutely enormous couch. The planet grew larger and larger into the empty void of nothing, at a faster and faster speed to accommodate the growing beings on the planet.

You were the only being on the planet that didn’t grow. You were but a mere quark in comparison in size to anything. To even travel anywhere without aid it would take you eons to get anywhere.

In fact, you probably would never ever get off this couch, since this couch itself was growing in size, at a faster and faster rate to keep pace with the expanding inhabitants.

Your seven super-powered alicorn friends stood tall and mighty from above, they were inconceivably large and beautiful. The size difference between you just kept becoming greater and greater as they ever increased in size.

They only became more and more beautiful as they got ever bigger, at a faster and faster speed.

Their rumps were omnipotent in size. The great bubbly mass of their cheeks stood tall and proud, their staggeringly enormous canyons between the great cliffs of their cheeks revealed their beautiful, fleshy marehoods. Their vaginas leaked an ever-increasing mass of marecum out, which flowed down like a river between their cheeks. Their marecum, however, was moving at a much slower speed than their growth rate. So, their cum would never ever reach the bottom of their canyons, since the bottom became ever further away as they continued to grow in size.

“I love you girls. You are so big and beautiful.” you said with tears in your eyes.

Seven, small, non-growing versions of the mares materialized out of thin air from all around you. Rainbow Dash lay her head on your right shoulder. Just below her, Rarity lay her head on your chest. From the other side, Pinkie Pie lay her head on your left shoulder. Below her Twilight lay her head on your chest.

Fluttershy was lying down behind you, and rested her head on your own between Rainbow Dash and Pinkie Pie. Applejack lay between your legs and rested her head on your right thigh.

There wasn't that much room left for Celestia, since even at a reduced size state she was still a very large pony in comparison to the others.

“Any room for me Anon?” asked Celestia, looking down at you with puppy dog eyes.

“Sure Celestia. Just face sit on us with your bigger form.”

The small form of Celestia faded out of existence. The loud sound of heavy hooves came. The inconceivably large form of Celestia now loomed over you. Your normal sight merely just saw a great wall of white, but your third-person perspective that was given by your friends allowed you to see that Celestia was looming over you with her absolutely gigantic ass.

Celestia unceremoniously slammed her massive ass on you, knocking the wind out of you and caused you to hiss in pain. The pain was short-lived as the heavy softness of Celestia’s ass smothered you and your friends.

Celestia began to rapidly outpace the other giants in the room. The love of you and the six alicorns amplifying her growth tenfold. Rather than protest, the others lay themselves down and allowed themselves to be smothered under the expanding mass of Celestia’s ass.

Greater and greater heights Celestia loomed into the heavens. Her growth was so fast she even outpaced the growth of the planet. Thus, she burst through the walls of the Golden Oaks library into the streets of Ponyville. No living thing was harmed under her ass, however, every non-living thing was either destroyed or flattened into a pancake.

Her rump crushed mountains as it expanded across Equestria. Celestia turned the planet into a disc shape, her subjects lay themselves down as Celestia's expanding cheeks rolled over them.

Her subjects worshipped her almighty rump by kissing and licking her. Celestia moaned aloud as she reached new ridiculous levels of size. Celestia became worried if she was too big for the others.

“We are your loyal subjects Celestia. Show us the true power of your rump! Grow Celestia, grow without stop, and make us look bony thin in comparison to you. I didn't deserve to be bigger than you. My butt was ugly in comparison to you” said Rarity.

“Rarity, you had a beautiful ass. I'll be glad to help you grow bigger than me at some point so you can facesit on me again.” said Celestia.

“Thank you. It will be an honor to facesit on you again at some point.”

“By right you deserve to have the biggest butt among us.” said Fluttershy. ” Even when I was bigger than you, I knew I was not the chosen one to be the biggest among us. You are the Royal Sunbutt, and it is heresy to be bigger than you. Please forgive me for being bigger.”

“Fluttershy there is nothing to forgive. It was a joyful experience for me to be under your beautiful ass as it expanded across all of existence. I certainly would love to see you grow bigger than me and facesit on me at some point.”

“Thank you Celestia.” said Fluttershy in a quiet voice.

“Princess Celestia facesit us into submission. Make us look like puny ants from under you!” said Rainbow Dash.

“Don't worry Rainbow, I shall make you feel far smaller than ants in comparison to me.”

“I love you, my big Princess.”

“And I love you too, Rainbow. Even as you become more and more insignificant in comparison to my size.”

“It ain't right for anyone to be bigger than ya. For as long as Equestria has existed ya had the biggest ass known to ponykind. That is why ya must grow to be the biggest among us. Your ass is holy and beautiful, and only gets more and more beautiful the bigger it gets” said Applejack.

“Thank you Applejack. I'll do my best.”

“Celestia, I love you. I've looked up to you for years. And I confess that I have looked at your beautiful butt from time to time.” said Twilight

“It’s okay. You are free to look and worship my royal backside to your heart's content.” said Celestia.

“Grow Celestia. Grow! Grow to sizes that we cannot even conceive of. Make us look puny and weak under your almighty rump.” shouted Pinkie Pie.

“I will Pinkie Pie. You will all be smothered under my supermassive ass. I shall grow, grow, and grow at a faster and faster speed. The softness of my ass shall leave you all a quivering mess under me.”

With their encouragement, Celestia did not hold back. She flashed her horn. And she created absolutely gigantic singularities inside her, amplifying the strength of the forces of creation inside her. She then exploded in size across Equestria like tidal waves. She was only too happy to oblige to grow bigger and bigger for her subjects.

Her subjects shouted praise from under her, worshipping her almighty rump. She magically increased the sensitivity of her nerves to perceive the tiny penises standing to attention.

“Mmmmm! Yes! Love me! My little ponies. Feel free to worship my divine, omnipotent, ever growing rump. Soon my ass shall cover this entire world and beyond and make everyone happy.” boomed Celestia.

Celestia moaned aloud as the growth flowed through her. Her puny subjects went into an animalistic frenzy of kissing, licking, rubbing, squeezing, and humping her rump’s soft flesh. Her subjects were in a state of utmost bliss, the weight and the softness of her massive rump felt absolutely incredible.

“Yes, pay homage to my glorious ass so that I can grow even faster my little ponies!”

A devilish grin formed on her face, before she decided to move her hips back and forth, grinding her massive rump against their small forms. She smiled at hearing their muffled moans into the mass of her squishy white flesh smothering them. Celestia loved dominating her little subjects with her almighty rump. As dominant as she was, her massive rump did not cause her subjects pain, but mind-numbing pleasure.

Her soft, heavy rump massaged their tiny bodies. Her subjects moaned in bliss at the soft feel of her giant squishy ass rubbing back and forth against them. Celestia for her part moaned at the feeling, in all her long life, she never felt such passion from so many lovers at once.

Celestia started to bounce her massive ass over the planet, slamming down on her puny subjects with greater and greater force, she caused earthquakes and her massive ass made a deep crater into the earth.

Many of her subjects soon succumbed to the amazing feel of her rump, unleashing their creamy white essence upon her fat milky white cheeks. Upon the cum touching her rump Celestia's cutie marks had glowed with power.

“Mmmm! Yes! My little ponies! Feed me your love so that I can grow even faster!” she boomed.

In a short amount of time her cheeks reached the very edge of the planet and into the great beyond. The gravitational pull of her body was so intense that the tiny multiverse (in comparison to her) Fluttershy and Rarity had created was pulled toward her. As the multiverse was pulled toward her, she safely guided it toward the middle of her right cutie mark. She didn't even need to magically glue it there since the gravitational pull of her ass was so intense that it was glued there anyway.

Equus the tiny planet in which she sat on became smaller and smaller in comparison to her. In a short amount of time, the so-called gigantic planet now became a mere quark in comparison to her size. It was now merely glued onto her ass rather than sat on.

“Why not only grow bigger but make us smaller in comparison to your great size?” you asked.

“Anything for you, my sweet little human.” she said softly.

Celestia shrank Equus to its normal size before she and the other ascended into super cosmic alicorns. The planet was already tiny in comparison to her than beforehand, now it was even smaller.

“Too big, even smaller!” you shouted.

With that, Celestia compressed Equus into a tiny world no bigger than a dinner plate. With living beings the size of nanobes. She could perhaps make it smaller, but she didn't want all her subjects to be cramped together. Well, they were currently still cramped under her ass. She used her immense magical strength to push the planet into her rump.

Celestia smiled at the even greater size difference between them now. Her subjects looked up at her with joy, pleading for her to grow even bigger and make them even smaller.

“Small enough Anon?” she asked.

“Err, that will do for the moment.”

“I wonder… if there’s another omniverse I can grow into?” Celestia pondered.

“Only one way to find out. Keep growing, my big sexy pony.” you said excitedly.

With your encouragement Celestia skyrocketed into the void in search to reach the end of it, growing at a greater and greater speed in the hope to reach the end.

Celestia created an equally as large copy of herself. Now there were two supermassive cosmic ponies in the void. The planet Equus was returned to a sphere shape.

The two Celestias lined up each other’s asses and sandwiched the planet between their supermassive asses. Their subjects cried out in joy by their planet being covered by not one, but two giant asses.

The two Celestias began to create more and more copies of themselves. All expanding at the same rate. Celestia multiplied like bacteria into the void, creating more and more copies of herself to try to fill the void.

Each individual copy of herself was hyper expanding and creating more copies of itself. This had the effect of her creating copies of herself faster and faster. But not only that, but each copy of herself was also growing faster and faster.

“I will one day fill the void. Just you wait void!” she boomed.

Author's Note

Big update this time. With super big ponies.

This might be the end. Butt.... I make another chapter if I get horny again for big ass ponies, who knows.