You, a human were sound asleep on this peaceful night in your king sized purple love heart shaped bed.
Until suddenly you were awoken by the sound of trotting hooves. With a groan you opened your eyes to find yourself staring at a great big butt looming over you, belonging to a towering, purple horse creature you were all too familiar with.
The horse… pony was about the size of a fully grown african elephant, if not even bigger. Her massive body towered over your small form, each of her legs were thicker than your own torso. Her massive rump was truly a booty worthy of the big fat horse butt gods of this world.
“Uh, Twilight what are you doing?”
She only answered you by making a mumbling noise and what sounded like the flick of a page.
Soon curiosity got the better of you, thus you decided to investigate by standing up, and then walking around the massive mare to see her magically holding a large book about the size of your body in midair before her.
“I don’t understand? The book says he should be kissing my ass right about now.” you heard her mutter quietly.
“Twilight, don’t listen to dating advice from Flexo Feathers. All his books have the word butt in it at least a thousand times.”
Twilight sighed deeply, before she made the book vanish before your very eyes with a flick of her magic from her long, pike like horn. Once the book was gone, she looked down at you with her massive, beach ball sized eyes in a pleading doggy eyed stare.
“Anon, will you go out with me?” she spoke in a low voice.
You rubbed the back of your neck, smiling nervously. “Look Twilight, you’re really beautiful, but I don’t see how it will work out.”
“Apparently not beautiful enough.” she said in a low voice, a single tear falling down her cheek.
With that you lunged forward to wrap your arms and legs around her massive, front right leg.
“No Twilight, you are beautiful. It’s just that, you are way too big for me.”
“Are you saying I’m fat?” she roared.
You whimpered in fear. “No… I mean, I like big meaty mares.”
“Then what’s the problem?” she asked in a most bewildered tone.
“Well Twilight, I might as well prove my point without using words.”
With that you let go of her leg, you made your way to the foot of the bed, Twilight looking down at you curiously as you did so. Once there, you pulled down your underpants to reveal your flaccid cock to her.
“Oh Anon, I don’t care if your penis is so small.” she said softly, before speaking sexfully. “In fact, I have a small penis fetish.”
“You do? That’s a weird fetish.” you said in a most bewildered tone.
“Oh, please. If I wanted a big dick all I would have to do is wave my big fat ass at Big Macintosh.” she said, waving her right hoof nonchalantly.
“Yeah, it’s going to be kinda weird for me. I mean, I probably lack the ability to sexually stimulate you. No matter how much of a fetish it is for you.” you said in a low voice.
“You still got hands Anon.” she said softly.
“Why can’t you just magic up my dick or something?”
“Unfortunately, the loss of blood flow from your brain will kill you.”
“Bullshit, you're a magical unicorn!” you shouted, pointing your index finger at her.
Twilight sighed sadly.
“Long ago, when Equestria was little more than a barren wasteland there was a mighty alicorn that lived alone in a world devoid of life. She spent millions of years alone, longing for company. She did eventually go crazy and painted a face on a rock. It was her first ever ‘friend’ and his name was Wilson. They were best friends for millions of years, until she became sane again.”
“Interesting, go on.”
“One day, a human appeared out of thin air. He immediately began to choke to death, since Equestria didn’t have oxygen to support life. To put a long story short she saved him, the two fell madly in love. Unfortunately, with her massive size and his small penis he could not please her.”
“So, what happened?”
“She tried to fix that by casting a penis growth spell, but it ended up killing him. In desperation she tried to bring him back to life, but it didn’t work. This made the poor mare so sad that she cried literally for thousands of years, the sheer mass of her tears formed the oceans of Equestria and actually gave life to the planet.”
“Is she still alive?”
“Oh yes, she still in fact crying to this day. However, these days she teleports her tears to other lifeless planets across the universe to terraform the planets so that life can form.”
“Damn. I feel like I should give this mare a good shag.” you said in a low voice, sad from hearing such a tragic tale.
“That would be so kind of you Anon.” she said softly, before speaking in a hot breathy voice. “But first, you got my big fat pony booty to attend to!”
With lightning speed, the mare turned around and slammed her massive, heavy backside upon you, crushing you under tons worth of squishy soft fat pony butt. Yet, miraculously your body wasn’t obliterated by her mighty pony butt.
Twilight pinned you down from under her massive butt’s incredible weight. Layer, upon layer of squishy soft fat smothered your entire body, her flanks were so thick and massive they shrouded your entire world in darkness. The soft fat of her backside folded around you like soft dough, depressing deeply around your small form. The heat from her marehood was wonderful, smelling faintly of beautyberries.
“Worship my butt, small penised male!” she boomed.
As your giant unicorn friend commanded you proceeded to pay homage to her massive backside with your small form, silently hoping your praise for her butt could turn her into an alicorn and thus have an even larger backside.
The End
A massive, heavy endowed mare pinned you down from under her enormous, meaty rump’s immense weight. Layer after layer of squishy soft fat smothered your entire body, the sheer thickness of her flanks were so dense they shrouded your entire vision in nothing but darkness. The soft fat of her huge backside folded around you like soft dough, depressing deeply around your small form. The heat from her marehood was amazing, that smelled faintly of beautyberries.
Somehow, you were not crushed into oblivion by Twilight’s titanic ass. It seemed these giant ponies’ backsides have some sort of anti-crush magic mechanism when they sit on those they have a strong affection for.
Twilight giggled when she felt your tiny cock raise to poke her gigantic rump, which was nowhere near compatible for her immense size.
“Your little cock loves my big fat ass, doesn’t it?” she spoke in a mocking tone.
A sad, muffled sigh left you, reverberating through the mass of Twilight’s massive rump.
Twilight acted quickly to reassure you, by squeezing her cheeks together, sandwiching your tiny penis between the two pliable, softer than silk, heavy mounds of fleshy purple spheres that was her humongous rump’s cheeks.
“Oh Anon, only you can cum on my butt.” she said softly.
You sighed in bliss at the amazing feel of her massive, soft purple buns squeezing your shaft between them. However, you didn't really have much time to enjoy it when you felt a sharp pain in your chest.
With utter desperation, you lifted your arms… tried to at least. This only resulted in your hands pushing against the silky soft fat of her rump, depressing it deeply. Your cries were muffled into the sheer mass of fat covering each and every inch of your pitiful form.
Fortunately, before things could go too out of hand Twilight lifted her massive rump slightly, allowing just enough room for you to take in life giving oxygen.
You coughed, gasping for breath, taking in as much air as you could before Twilight sat down again, smothering you from under her enormous ass.
A soft coo left the giant purple unicorn when she felt you move your hands slightly from under her oppressive weight. You used your limited mobility to make your fingers rub against the soft fur of her backside, digging in deeply into the thick layers of squishy soft fat. Though, it really wasn't that deep, since you could only dig into her ridiculously thick, soft flanks so far, due to her monstrous weight, and the fact she was after all the size of a fully grown african elephant, if not even larger.
“Awwww yes! Worship that ass!” she shouted excitedly.
Your hands squeezed and rubbed her squishy soft flesh between your fingers, basking in the wonderful feel of her soft fur against your bare skin. You soon decided to pay more homage to dat ass, by licking, kissing, rubbing, and squeezing the massive butt atop you.
“Yes! Worship my big fat ass, little human!” she shouted.
Twilight moaned aloud at the feel of your hands’ and mouth’s loving attention toward her ass. This compelled her to begin lightly bouncing her massive rump up and down you, her sheer weight shaking the house on its very foundations.
Her heavy softness collided with your small body over and over again, Twilight moaning and whinnying aloud from the tender worship you gave her rump.
Once again, Twilight dropped her backside down upon you, but this time she decided to move her hips back and forth, grinding her massive rump against your small form. You moaned aloud into the mass of squishy purple flesh smothering your face.
Her soft, heavy rump massaged your tiny body, the soft feel of her squishy ass rubbing back and forth against your body caused you to shake uncontrollably, you moaned and groaned aloud in pure bliss.
After quite a bit of time had passed, the massive mare wiggled her huge butt over your small form, positioning her fat marehood right over your face. A hot wave of heat emitted off her marehood, her sweet juices dripping down upon your face.
Immediately, you went to work by using your mouth to hungrily lick the soft, plump flesh of her great and meaty marehood, her sweet tasting juices flowing into your mouth. Twilight uttered a series of loud whinnies from your loving mouth’s attention, grinding her hips back and forth, causing her to rub her fat vagina against your head.
Your cock twitched hard, loving the knowledge that your mere, tiny mouth was pleasing this mare well. Combined, with the squishy soft fat of her rump rubbing against your cock and whole body, you were quickly approaching the finishing line of your release.
You wished you could holdout more, but Twilight’s butt felt far too wonderful. So, with that your cock gave one last twitch, before unleashing your creamy white essence upon a tiny area on her massive rump. Such a small amount of cum would be disappointing to most, but since Twilight has some sort of bizarre small penis fetish it had the opposite effect.
Twilight closed her eyes, craning her neck back to unleash a loud neigh, her thick, fat marehood spasming repeatedly, showering you with wave after wave of her creamy essence. At the same time, her huge rump began to ripple like jello, before beginning to rapidly expand out like a balloon.
The already massive mare cried out in pure ecstasy as her body grew higher and higher into the air, her rump quickly growing into truly monstrous proportions, her cheeks thickening outward. Her hooves elongated, spreading across the room, along with a particularly strong emphasis to grow her rump to greater and greater size. The growth indeed seemed to be at it’s strongest in her backside, becoming quite disproportionate to the rest of her body.
Twilight became lost to the world, her growing body causing her to go through mind numbing pleasure, moaning aloud as her marehood flowed like a river, flooding the room with her creamy cum.
The mare began to bounce her colossal, growing rump upon you, now overwhelmed with pleasure, moaning aloud while lost to the world as her body and rump rapidly inflated in size, her bounces only becoming harder and harder as her rump ever increased in weight and size.
In no time at all, Twilight's ballooning rump quickly became even larger than Princess Luna’s and Princess Celestia’s butt, that might as well be considered bony thin at this point, when compared to the sheer mass of Twilight's fat rump.
Twilight's backside was officially the largest, fattest pony butt of all the world, and she was still growing bigger and bigger. Her succulent, ballooning ass pushed you deeper and deeper into the mattress beneath.
Her hips truly became monstrously large, only growing bigger and bigger by the second. The growing mass of flesh caused her fat cheeks to jiggle wildly while she bounced atop you, only becoming more and more jiggly as her rump ever grew in size.
More and more layers of pillowy soft fat added to her butt in a manner of seconds. Her rump assumed greater and greater size, becoming fatter and fatter, bigger and bigger, heavier and heavier. This made her only even more non compatible to your small size, your tiny penis having no hope in pleasing the behemoth mare… without her small penis fetish at least.
The bed beneath her gave a loud groan, before the wooden supports snapped like matchsticks from under Twilight’s increasing weight.
A giant, mighty canyon formed above you, entrapping you between two hilly mounds of flesh that was her rump's flanks, which were only growing bigger and bigger.
Twilight’s cheeks ballooned outward, quickly filling up the room. Soon, her flanks began to press against the very walls, the squishy soft flesh of her rump being pushed back deeply as they pushed against the walls. The very building you were in creaked and groaned from under the weight and pressure of Twilight's growing body.
The walls held stubbornly against the growing tide of Twilight’s flanks pressing against them. However, the pressure only grew more and more as her cheeks became ever larger.
Dust and debris fell from the ceiling, before the walls were smashed into tiny splinters.
Over the ruins of your home Twilight continued to grow and grow, her body surging up over the surrounding buildings of Ponyville, her gigantic rump rapidly spreading across the street.
Twilight's butt continued to grow larger and larger, quickly reaching the nearby thatched houses. When her inflating flanks reached them, the squishy soft fat of her cheeks got pushed back, depressing deeply against them.
Fortunately, before things could get too out of hand, Twilight's growth ceased, stopping just short of bulldozing the surrounding houses.
A vast dark shadow loomed over the sleepy little town. Twilight had grown so large, she was about twice the height of town hall.
Twilight looked behind her to see a new huge pair of feathery wings on her back.
“Wow! I’m an alicorn now! Thanks Anon! Your human cum is truly magical!” she shouted excitedly.
You muffled approvingly from under the vast mass of her massive rump.
