Nestled within a huge ass oak tree library concoction of a building, you, the human, were sitting upon a pile of soft hay. In front of you lay a very short round wooden table, the table in question was a light brown colour. The table was clearly not designed with humans in mind, considering the small horse people who lived here were usually only about four feet tall. The horse people did not like to be called horses; it was considered very offensive. They like to be referred to as ponies.
You were trying to read one of their books. Held in your hands was a pale blue leather-bound book. At least it was a 'leather-like' material; you're curious if the ponies would use leather in this world to bind their books. The book was open in your hands, but trying to read said book was next to impossible. It was written in Ponish, the language these ponies speak. Verbally, it is basically English, but with terrible horse puns thrown in here and there. Even the town you now live in has a terrible horse pun.
The town was named Ponyville… Thankfully, the place you live in this town is called the Golden Oak Library, which is a fairly decent name, all things considered. It was not some nonsense like Pony Library in a town literally called Ponyville. Considering the puns here, you don't think it's impossible to have such a name in some other place.
Anyway, most of the symbols in the book resembled hay bales, horseshoes… and, strangely enough, pony butts, each with their own variation of a symbol on each cheek. You even recognised some symbols, such as a love heart or a question mark. But you have no real way of telling what the butts were trying to convey.
Speaking of butts, you could see your lavender unicorn friend's fat butt was sitting upon a large dark red cushion nearby. You could not help but occasionally glance at her butt; it was so meaty and thick. You could hear the mare humming quietly while she read her book in front of her at a book stand.
The mare in question was named Twilight Sparkle; she seemed quite content to read her book. Although, you swore she had moved closer to you unless you were imagining things. You shrugged off such thoughts and resumed reading your book. Well, looking at it, at least. There was some degree of entertainment in the books; on some pages, you could see a picture of a lovely mare's big fat rump. You could only assume many of these books were some sort of porno.
There was no TV, Internet, or much technology in this world in general. You have to do the old-fashioned way of fun, like socialising with people and looking at physical porn in books for entertainment. There didn't seem to be magazines around, so you would need to look at books for porn.
You like looking at pictures of pony asses in particular. Unfortunately, this book did not have such a picture. You sighed sadly, and with that, you closed the book shut with a loud bang. The book became lit with a light pink magical glow; it was then levitated into the air and placed on a nearby bookshelf.
"Anon, are you bored?" came Twilight's voice, ripe with concern. Her eyebrows furrowed as her eyes sparkled with a certain sprinkle of starting tears. The pony clearly did not like that you were sitting there after having closed the book. Dust came flying into your face from the book though you did not cough from it.
You turned to look back at her. You looked at her face this time, not her rump. The mare had her head looking back at you like that of a barn owl. The mare looked at you with a beaming smile. Though her smile still twitched a bit from her concern. Clearly, this pony was not good at hiding her true emotions.
"Uh, no. Twilight, I'm okay," you said quietly, turning to look away from her. Staring at the ground as you tried to avoid her gaze. Knowing full well, she wouldn't accept you saying that. Though you could not but pray to Celestia that she would accept it this time.
"Nnneeeiiihhhgghh!" uttered Twilight before she spoke properly, not primitive horse language. "Anon, don't lie to me. Of course, you are bored, and you can't read Ponish. No matter how much I try to help you with it," she said sternly. Talking like an upset mother as she glared at you. Her eyes stared into your very soul as she shrunk back a bit.
You turned to look back at her, a frown on your face. "What do you suggest then?" sighing in annoyance as you didn't want to do this right now. As you were quite tired of talking about it. Returning her glare with a fiery one of your own as you sat there. Hands curled up into fists on your lap as you bit your lip.
Twilight answered your question by wiggling her rump back and forth; in doing so, it generated a loud, meaty clapping sound as her fat bubbly cheeks came to smack together. Your jaw dropped in shock at this turn of events. You blushed super hard as you looked away but were unable to. The soft bubbly cheeks draw your gaze like a ship in a whirlpool.
"Oh, I dunno; I feel it would really help me study my friendship lessons if you played with my butt," spoke Twilight in a hot breathy voice while staring back at you with her eyes laced with lust. Winking at you playfully while biting her lip in lust. Her eyes filled with the fires of passion which clashed with yours from before. Hitting together and extinguishing your own fire and blindsiding you.
Your face became bright red as a tomato, like a true gammon. "I-I… uhh, isn't this a little soon? I've only been in Equestria for like a week. I'm not ready for this sort of thing. I'm not sure if I'll–". You were not sure what to do as you licked your suddenly chapped lips. Shifting yourself as you had an uncomfortable bulge in your pants, giving you a massive tent in your pants as you sat there.
You opened your mouth to say something, but stopped when Twilight clapped her cheeks again. Your body trembled as the mare stared back at you with a nasty grin. Your cock throbbed hard in your pants. Your hands tremble and become clammy as sweat drips down them.
"I would like you to help me study my friendship lessons by playing with my rump. And by all means, you can clap my cheeks. But please don't be too distracting. I have a very important book to read," she said sternly, asserting her authority. She is, after all, your landlord.
This didn't seem to make any sense at all, but you weren't going to argue. Again, she is your landlord. Maybe, this was her way for you to pay rent? It was a bit unorthodox, but if clapping Twilight Sparkle's cheeks was the method to pay rent here, you have little choice.
With nothing else forward, you made to stand behind the lavender mare. She seemed quite excited. You could see her tail wagging back and forth in anticipation of you giving her rump attention. Like an excited dog as you blushed deeply and saw her butt jiggle a bit. Causing your eyes to look over her butt without being able to stop yourself from staring at it.
"Take off your clothes," she said sternly. You did what you were told. You stripped yourself naked and left your clothes on the floor in a heap. Twilight frowned at the sight of your erect cock. She clearly wasn't impressed; it was only about six inches long. She was probably used to much larger cocks from stallions. Your cock must be absolutely pathetic for her.
"Oh, Anon, my human friend, I might need to help you out at some point with a cock growth spell," she said in a most disappointed tone. You looked down in sadness at her words, which stung at your heart.
Twilight's jaw dropped; realising what she had done before, she flared up her horn with a deep pink glow, subsequently unleashing a spell upon your cock. You could feel her magic gently stroking it. You trembled in bliss at the tingling feeling of her magic. Lovingly she stroked your cock for at least about 10 seconds before stopping her spell. You could even see your cock gained about 2 inches, bringing you to a total of 8 inches in length.
You looked up at the mare, who was looking at you with a warm, welcoming smile. "Oh, my human friend, your penis size is fine. It still would feel pleasurable for me. Besides, if your cock was too large, it would be too distracting for what I have planned."
"Thank you, Twilight," you said, giving her a smile back before returning to looking back at her fat ass. Twilight giggled as you looked upon her plump rump once more.
"Hehe! You're welcome, my friend," she said softly before speaking in a more dull, serious tone; back to business. "Anyway, I still need to cast a spell I've been working on. Otherwise, you would be far too distracting from giving me pleasure." Her horn ignited with a massive purple glow. Sparkling in the air and causing the air to fill with a hum. Bringing your eyes from her rump to the glowing horn before you are rapidly forced to look away. Then forcing your eyes back to her backside.
With her starting the spell, Twilight's horn lit up with a deep pink glow. Her horn hummed with power, along with the star marks on her cutie marks glowing with a blinding light. The air crackles with eldritch energy as it sparks off of her horn. Flowing down her horn in the spiralling lines that go up to the top of her horn. You shielded your eyes from the light before taking your hand back down when the light faded.
Just then, you felt something warm and soft bump against your body. You opened your eyes to see a wall of purple pushing against your face. Your jaw dropped at the shocking turn of events that now began to take place in front of you. You could see Twilight's rump was rapidly air ballooning in growth, and you found yourself being pushed backwards as her rump inflated against you. You became pushed further and further back; nearby bookshelves spontaneously were knocked over by Twilight's rapidly ballooning cheeks.
She kept growing and growing until she might as well be a monstrously large African Elephant in the library. If not even larger. Since her rump alone, from your perspective, might as well be a monster truck. Forcing you to crane your neck heavily to even look up at her face. Your mouth was unhinged as you drooled a bit before closing your mouth with a hand.
Twilight giggled, playfully bouncing her fat butt up and down, causing her fat buttcheeks to clap loudly with loud, meaty slapping sounds. Enjoying your response to her growing her butt. Winking back at you and blowing a kiss teasingly as she wiggles her eyebrows at the human behind her.
"Hehe. My new growth spell worked perfectly," Twilight giggled, her body sparkling with dark pink magical energy. Lightning flew off her body from the amount of power in her body. Even the area behind her eyes glowed with her purple power. Making the disparity in power all the more apparent between you two. "Oooh, I even feel both physically and magically stronger at this size. At any rate, my friend, you should not be too distracting at this size. I don't think you have the adequate-sized penis to mount such a large ass."
You felt somewhat hurt from hearing Twilight say that. Twilight giggled as if she read your mind. Her rump seemingly then mocked you by growing even larger in size. The sudden huge migration of fat pumping into Twilight's ass caused her plump bubbly cheeks to clap loudly with a thunderous meaty slapping sound of flesh slapping against flesh. The claps of her cheeks create massive shockwaves. Making you stumble a bit on your feet and almost fall over from the force of her rump.
Then you noticed the dimensions of the library increasing in size. "Hehe! Just making some future plans if I want to get bigger again. Pocket universe spells are wonderful," Twilight says with a giggle as she puts a hoof to her mouth. Muffling her giggle with a hoof before putting it back on the floor. Shaking the whole room and making you fly several feet in the air before landing on her ass. Causing you to sink into her ass fat a bit before you climb out. Rolling down from her butt and landing on the ground with a thud.
You quickly stood up and placed your hands on either side of her lower plump cheeks. There was no way you could reach the upper section of her rump; it was just too tall. Your hands sank into the warm, bubbly softness of her rump like that of a squishy purple marshmallow. Her backside didn't even have a hint of sag. It was perfectly smooth and round, seemingly defying gravity with its glory.
You lovingly fondled the lovely, marshmallowy softness of Twilight's fat rump. Your hands upon her rump created deep depressions into the soft bubbly fat of her ass; it melded to your touch like squishy pizza dough. When your hands moved to a different location on her ass, the depressions you made would slowly fade away, and her rump would return to a perfectly smooth shape like a still lake.
Twilight moaned in pure bliss at the attention you gave her fat ass. While you were lovingly fondling her butt, you were forced to walk backwards as her rump slowly became fatter at your touch like an inflating balloon.
"Mmm! Yes! Worship my big fat lavender unicorn butt! My little human friend!" Twilight Sparkle moaned, rocking her hips back and forth, causing her fat bubbly cheeks to clap loudly with loud, meaty slapping sounds of flesh, slapping against flesh. The massive asscheeks were like rolling waves from the force of her hips. Making it so you could barely see how big her rump is. Covering you in darkness before she forced her butt off of you.
Your body became a little wet when a creamy blob of musky-smelling liquid came leaking out of her. You looked closer to see that her pink and meaty marehood was winking at you excitedly. Her marehood would be quite hard to reach. For the canyon gap of her buttcheeks is like two extra large mattresses at this point. Your average mattress ranges from 8 to 14 inches tall, and Twilight's asscheeks are easily twice that. So you would need at least 28 inches of cock just to enter the tip of her marehood. So, even a 28-inch cock would be very small for her.
To put things into perspective, your cock is borderline microscopic for this massive ass. Your cock was a measly eight inches, and she needed 28 inches of cock just to enter her. You don't even have half the length required for this massive ass. Your cock would just end up being hugged by her fat cheeks before even reaching her marehood unless you were to go between her asscheeks to access it. Which doesn't sound like a bad thing since Twilight will hug you with her fat rump's cheeks.
To make matters worse, the distance was only increasing as she slowly got bigger and bigger as you lovingly stroked her fattening ass. Twilight's ass was only getting bigger and bigger, and fatter and fatter, and she didn't seem to be stopping any time soon.
You were taken out of your pondering thoughts when Twilight's ass violently surged in growth through a powerful growth spurt; you were slowly pushed back as her rump air ballooned fatter in size; the resulting migrations of fat pumping into her ass caused her bubbly cheeks to clap loudly with a meaty slapping sound. Her rump jiggled and bounced about wildly as it became fatter and fatter before you. Rolling waves of cellulite go over her butt and make your eyes go wide. Each wave of fat goes up and down for several minutes before slowing to a stop.
Her growth was getting stronger, and this only complicated things further.
Twilight grew… grew… and grew… without stopping. You stared in awe as Twilight's ass bounced about wildly as more and more fat pumped into it. A dark shadow loomed over you as her rump became taller than ever before. When she finally stopped growing, her rump alone might as well be a blue whale. At this point, you might need a cock the size of a 25 ft tall Roman Column for how large her rump has become.
The very dimensions of the library struggled to contain her ass now; she was so large, even with the pocket universe spell. The squishy soft folds of her rump's fat squished against the walls of the library, threatening to bulldoze them down. Dust and debris fell from the ceiling. She would need to cast another pocket universe spell if she were to grow larger again. Twilight's body now produced great heat like a hot radiator, and her form swirled with dark pink electrical-like energy. The temperature of the room drastically increased, and you were sweating profusely from the heat of this massive mare.
You gulped when the walls of the library began to expand along with the ceiling; she must have cast the pocket universe spell again. Twilight clearly intended to grow bigger again. Leaving you in the dust and making you feel super small. Not knowing how big she would get left tingles going down your body. Making you so much more horny than you already were.
Once more… Twilight began to become even larger, her growth stronger than ever. She seemed quite addicted to her new growth spell. Her fat ass bounced and jiggled as more and more fat was pumped into it. The mare's tongue lolled out of her mouth as her rump ballooned further in size. You found yourself taken under an avalanche of fat rump rolling over you. You squirmed beneath the immense weight of her ass bearing down on you, but otherwise, you seemed fine.
Your erection poked against her soft rump smothering you. You moaned in bliss at the feeling, your moans being muffled by Twilight's fat ass covering your face. Twilight giggled happily from hearing you moan, her growth becoming stronger. Flashes of magic filling the air as she grows faster and faster. Making your cock throb with horniness as pre-drips out the tip. Pleasure sparked up and down your body as you shivered with a smirk on your face.
You could now hear the thunderous clap of her buttcheeks as Twilight kept getting bigger and bigger, heavier and heavier, fatter and fatter, without stopping. You could soon hear the wooden floor crack beneath the immense weight of Twilight's ass bearing down on it. Cracks spread out along the floor like the slow breaking of glass as a rock hits it. Several holes formed in the floor about the size of golf balls as the integrity of the floor started to fail.
The mare began to moan aloud, rocking her thick hips back and forth, her fat rump rolling back and forth over you like a steam roller. You cried out in bliss as the bubbly softness of her ass washed back and forth over you like the softest, heaviest blanket you've ever known. Making you hump up into her ass, making it jiggle and clap even more. Though, you barely made a mark on her massive rump, which was like a mountain to you.
Just then, there came a flash… and Twilight became vastly reduced in size. She was still quite massive, though. You took this opportunity to slowly stumble back onto your feet. You groaned in pain, for your body ached from the immense weight of Twilight's ass. It felt like you were doing a heavy weightlifting session at the gym. It was as if your whole body was on fire as you panted heavily. Putting your hands on your knees as you bent over a bit. Then slowly, standing back up to look at the mare.
Her rump alone might as well be a monster truck. The double mattress thickness of the canyon gap between her buttcheeks meant you would require about 28 inches of cock just to gain entry into her marehood. Even a 28-inch cock would be very inadequate for her size. You have nowhere near the size required for Twilight's massive ass. Leaving you dismayed as you looked at her ass. Not sure as to what to do to please the lovely mare.
"Hehe! This is wonderful. I can control my size," she said with a giggle before demonstrating her ass ballooning out like an emergency car airbag, which caused her fat bubbly cheeks to clap loudly from the sudden small growth spurt. You were spontaneously sent flying backwards about 20 feet or so as her ass slammed against you. You fell in a heap upon the floor, but there was no pain to be had. You slowly then jumped back to your feet. Clapping at her happily and applauding her power before blushing. Scratching the back of your neck in nervousness before going back to looking at the mare. Going back to laying down to take a rest as you try to recover from the impromptu workout you had.
Twilight then spontaneously undid the little growth spurt she demonstrated to you, her rump becoming slightly thinner as it lost the fat from the previous mini-growth spurt. Still, from this angle, while you were lying down on the floor, Twilight's ass looked so much taller as it loomed over you, casting a dark shadow over your puny form when compared to hers. Making you gulp a bit as you stare at the ass in front of you. Even her breathing caused her cheeks to clap and jiggle as you did so. Making your cock throb in your pants heavily and making more of a mess in your pants.
Twilight frowned before undoing the shrinking of her rump. A massive flood of fat pumped into her ass, stronger than the previous growth spurt, her meaty buttcheeks clapping like thunder. Her rump ballooned towards you and nearly took you under it. If her rump grew just a few more inches, her ass would have smothered your feet. You chuckled and then forced your feet into her butt. Making them sink in like it was quicksand before starting to push back and forth. Letting her butt slowly reform before starting to push your feet back in. The mare giggled at the feeling of your feet on her rump.
At any rate, you concluded you may need a 58-inch cock to barely enter her marehood now. For she seemed to have doubled in size. Actually, it was probably much more than that since, figuratively speaking, each one of her buttcheeks was like a monster truck at this point. At any rate, you needed a much longer cock to fuck her marehood without going between her asscheeks now. The gap between her buttcheeks was practically a small cave at this point. Your cock would be like throwing a hot dog down a hallway for this massive mare.
Despite this, you stood up and made to position yourself between Twilight's fat bubbly cheeks; your cock was erect for the task at hand. You placed your hands on either side of Twilight's chubby cheeks, your hands subsequently sinking into their bubbly softness. Going in several feet as you blushed deeply like a cherry tomato. Feeling your hands struggle to get pulled out as you barely managed to pull your hand out from her rump. The rump of hers slowly reformed before you pushed your hand back into her butt.
Twilight, in reaction, squeezed her asscheeks tightly together. You wasted no time and pressed your cock forward, pushing it between Twilight's fat asscheeks. You moaned, your legs trembling at the feeling of Twilight's buttcheeks lovingly hugging your cock in a gentle, warm and soft embrace. Even if this is not technically her marehood, it still felt absolutely wonderful to be hugged by the snug embrace of her asscheeks.
Your balls came to lightly slap against Twilight's fat asscheeks, causing it to jiggle about like a waterbed, creating a loud, meaty slapping sound as her buttcheeks smacked together. Your cock throbbed painfully between Twilight's asscheeks; it almost seemed as if you were denied your release. Trying desperately to release as you humped hard as fast as you could into her butt. Making it jiggle and clap some more as you did so. Your body sank into her fat ass so that you could barely see anything but her.
Eventually, you stopped humping her rump as you ceased your movement. The pleasure growing in your chest like bubbling in a soup as you panted heavily. Sparks of pleasure went up and down your spine as you clutched your chest. It was as if you were having a heart attack from the pleasure, but you were not. Your heart was beating in your chest, and you could not summon up the strength to move at the moment; the warmth and softness of Twilight's ass hugging your cock was just too much.
You could hear Twilight humming quietly as she read her book. With a flash, you could magically see in your mind Twilight's face, who was looking at her enlarged book, which was about the size of a small car. The book stand in front of her was also drastically increased in size to hold such a large book. Twilight was not even paying attention to you as she rubbed her butt up and down your body. Forcing you more and more into the floor as you moaned into her ass.
The mare hummed quietly as she read her book from left to right. Your heart was still beating too hard in your chest to do anything else but to watch Twilight read her book peacefully. Twilight didn't have a care in the world; it was as if you weren't there behind her with your cock sandwiched between her massive buttcheeks. When she reached the end of the page of the book, her horn lit up with a deep pink glow , and with a flick of her magic, she turned to the next page of her book.
You moaned at the feel of yourself pushed back as Twilight's ass just became even fatter; the resulting migration of fat pumping into her ass caused her asscheeks to clap loudly with a loud, meaty slapping sound. Twilight ignored you and continued to read her book without care. Twilight had either done this before to a stallion or some pony else before you. Unless she maybe planned this out before she met you. You would never probably know, and you were happy that way.
You didn't move and watched in fascination as Twilight read her book. Nothing eventful happened for the next two minutes until Twilight turned the page of her book with her magic again. Sparks flew off the book and hitting the ground before sizzling out. Her butt then started to glow with the beating of her heart as you lay there, unable to move due to her fat rump. Feeling it squish and jiggle around you like Play-Doh.
Twilight's ass grew fatter, pushing you backwards as another migration of fat pumped into her ass, causing her fat cheeks to clap loudly. Your heart began to settle, and thus you started to thrust your hips back and forth against the massive unicorn before you. You moaned in pure bliss at the feel of her fat asscheeks hugging your cock as it slid back and forth between them. Your humping caused the whole room to shake as the clap of Twilight's fat asscheeks filled the whole room. Shockwaves filled the air and caused mini tornadoes to form before fading.
Twilight's only reaction to this was a smirk appearing on her face for a brief moment. But other than that, she continued to read her book without care. You were insignificant to her, but you found yourself not caring. This was, after all, part of the plan; Twilight didn't want you to be too distracted while she studied her friendship lessons. Though you could feel things slowly warming up as you humped her butt. Though, you tried to follow her wishes and not get too distracted as she studied. You didn't want to upset your sexy mare lover.
You considered Twilight a good friend, for she allowed you to have fun with her rump while she studied. Her beauty was also unmatched among many ponies of Ponyville. Leaving most of them awestruck with her beauty and the stallions jealous of you. Though you would prefer to focus on her rump right now. The jiggling of her massive purple cheeks going up and down in waves. Almost making you go deaf from the decibels being produced by her jiggling rump.
Your hips were a blur of motion as you made love to Twilight's fat butt. Each time your balls smacked against her fat behind her ass could jiggly about like a stormy ocean. At the same time, you moved your hands up and down, lovingly stroking the fat ass of your massive lavender unicorn friend. Your hands would create deep depressions into the thick bubbly fat of Twilight's enormous ass. And, Twilight's ass was only getting fatter and fatter each time she turned the page of her book.
You were starting to get sick of being ignored by Twilight, so you decided to do something that would really distract her. You put your plan in motion by pushing your body between Twilight's fat cheeks. Twilight came to hug your body with her bubbly cheeks, enveloping them in warmth and softness. Making you moan happily as you smirked to yourself. A devious glint in your eyes as you felt your body be surrounded by the mountains of purple rump. Some of her sweat got on you as you blushed heavily.
The pleasant stench of her musky marecum was bombarding your senses. In the gloom between her asscheeks, you could see her massive, thick and meaty pink marehood glistening in the darkness. It was the only thing your eyes could see in the complete darkness. Making your cock throb hard in as you sink into her fat rump. Having gotten sucked deep into her ass like it was a whirlpool and you were a ship that got too close. A flood of her river of her thick and creamy marecum was continuously leaking out of her soaking-wet vagina. Some of the marecum slamming into your body and getting you covered in the sticky sweat smelling goop as you grabbed onto whatever you could to not be swept away by the deluge of cum.
In your mind, you could see Twilight turning to the next page of her book. This was followed by her fat buttcheeks clapping loudly, echoing all around you as more fat came pumping into her ass. The thick nether lips of her sex increased in size before you, like swollen lips. The lips of her marehood were so thick they might as well be Roman columns in terms of width, at the very least. Twilight's birth canal was absolutely gigantic. The cock you needed to mount this mare might as well be a full-blown heavy cargo truck. Causing you to whimper as you tried to push it into her but not getting anywhere. Just getting yourself covered in her mare juiced even more as you were soaked head to toe with it. You imagine the task of Twilight squeezing her marehood around your cock would be pretty difficult for her, even as a pony. Your 8-inch cock would basically be microscopic for her. She wouldn't be able to feel it since your cock is so small compared to her body. The lips of hers were like massive walls of a cave.
With nothing else for it, you leaned down and began to lick the lower lips of Twilight's succulent vagina; the pink colored lips trembling at your touch like a tree in the wind. You moaned at the taste of her creamy marecum touching your lips and seeping into your mouth. You immediately got a reaction from Twilight; hearing her moan in bliss, along with the lips of her marehood inflating from your loving attention; this was followed by a loud, meaty clapping sound as a massive migration of fat came pumping into her ass; resulting in her fat bubbly cheeks slapping together. Making it even harder for you to keep licking her cheeks as you were pushed back a bit by her fat rump but you managed to hold onto her lips.
"Anon! You're being so distracting! I'm trying to study! Please stop now, or I'll—Ooooh! Mmmm! Yes! Yes! Yes! Mmmmm!" The mare devolved into a moaning mess as yet another migration of fat flooded into her ass. "Don't stop! Give me more!" she boomed with her mighty voice, which was thankfully muffled as you lay smothered between her asscheeks. Though it still vibrates your ears and almost causes you to go deaf. Making your ears ring with the loudness of her voice even with the massive bunker like walls that were her asscheeks muffling the noise.
Lovingly you licked Twilight's succulent sex, the walls of her fat cheeks expanding all around you as her rump continuously air ballooned in growth. Behind you was like an expanding cave, the entrance of which became further and further away as Twilight's ass continuously grew larger and larger from your loving cunnilingus. The light of the outside slowly gets farther and farther away like an ever increasing hallway in a nightmare. Eventually it was but a pinprick of light in your vision as you continued to eat the lips of Twilight like it was the only meal you ever had. Figuratively speaking, it was like you were trapped between the grand canyon that was Twilight's asscheeks at this point.
You could hear the thunderous clap of her fat bubbly cheeks echoing from all around you as monstrous surges of fat pumped into her ass like a stormy ocean. Further and further, the exit out of her became until it might as well be a distant small island over the horizon. It was like a lighthouse at sea. To manually leave Twilight's ass now would take hours; who knows how large she has become. Though the thought of finding out how large she was only made your cock throb even harder. Making you lick even harder on her lips as you moaned happily. The taste of her juices having made it so it was only you would be able to taste for several months.
You stopped licking her lips to look over your handy work. You could see that her nether lips were like looming mountains before you. Her birth canal was now like that of a massive gaping asteroid crater. You could easily get lost in there for months without being able to get out. Even the small bit of light behind you caused her juices to glimmer in the light. Allowing you to see the parts of her nether regions within the area of the lips.
With a glimpse of her magic, you could see Twilight's face sweating profusely from your loving work. The book she was reading was so massive it might as well be Mount Everest in terms of size. The massive giantess mare sighed happily, a big happy smile on her face. You could see her eyes moving over the book as she continued to read it despite what you had done earlier. Though she would be struggling to continue reading as you kept licking her lips. Sparks of pleasure flying off her horn as her eyebrows furrowed. You could tell she was having some troubles as her smirk turned into gritting as you chuckled. Enjoying the effects you were having on her as you did all this.
With a flick of her magic, she turned to the next page of her book. Twilight eyes rolled back, uttering a deep throaty moan. Her cutie marks glowed with a blinding light, along with her body rose up by tens of thousands of feet; this resulted in a massive monsoon of fat flooding into her ass, along with her chubby bubbly cheeks clapping loudly due to the resulting migration of fat pumping into it. Pushing you deeper and deeper into her rump. Making your chances of escaping her ass without her help more and more miniscule. Not as if you cared though as all you wanted to do was please the mare that you had come to love over all this time. You could then see a pair of wings sprouting out from her back; Twilight Sparkle was no longer a unicorn; she was now an alicorn and had ascended to godhood. It seemed you had a special power to turn ponies into alicorns by eating them out or maybe this was just a fluke? You thought to yourself as you kept eating her out.
There then came a flash, and you found yourself standing behind a normal-sized Twilight with your hands holding her warm and soft buttcheeks; your hands were sunken deeply into the plush fat of her rump. The library from all around you was also returned to its normal size. Twilight was slightly larger than before, though; it was probably due to her being an alicorn now. You then smirked at Twilight and then spanked her butt playfully. Leaving a mark on it as she eeped a bit and then giggled to herself. Putting a hoof to her mouth as her butt jiggles a bit before she looked back at you.
Twilight turned to you with a smile on her face. "Thank you, my friend, this was a nice speedrun to becoming an alicorn. I didn't have to do all the other stupid friendship lessons," you nodded in answer, which caused Twilight to giggle with a hoof over her mouth. Shaking her rump back and forth at you. Making her butt clap and jiggle some more but not as violently as before. Allowing you to see how beautiful your loving mare was as an alicorn. "Now, do you want some actual vanilla sex with me?"
Even as she said this, her rump pushed you back as it became even fatter. Twilight seemingly jumped up in height by several feet. Even without her horn going active she grew even more. Clearly her power had grown a lot after all of your sexual fun. Though you were not complaining as you sat there while playing with her rump some more. Feeling her fat rump go in between your hands like dough before going back into place. "Mmmm! With just a hint of spice?" she said in a hot breathy voice. Her voice booming around the room and hitting your ears and filling you with pleasure. Leaving you a horny mess as you almost melted at the touch of her ass.
You simply nodded; it was hard to speak while drooling as you stared at Princess Twilight Sparkle's fat ass. Closing your mouth with an errant hand as you looked up at her lovingly. You were gonna enjoy the rest of your life with the immortal goddess.
End!
