Acting A Foal

by Bounsweet

Rating: teen
Tags: Diamond Tiara, Slice of Life, My Little Pony: Friendship is Magic, Comedy, Spoiled Rich
Length: 1245

After Celestia transformed Spoiled Rich into a adorable foal, she must endure the shame of being a mare in a foal's body.

After Celestia transformed Spoiled Rich into a adorable foal, she must endure the shame of being a mare in a foal's body.

Learning that if you act like a child, you will only make a foal of yourself.

Alt Sequel/Ending to 'Act Your Age', if interested in The True Sequel where Spoiled stays a foal check out Growing Up Spoiled.

Published 2018-09-08 16:20:01 UTC
Last updated 2018-09-08 16:20:01 UTC

A Lesson Learned.

Spoiled Milk could sense something was wrong as her older sister changed her diaper, the petite violet foal sticking a tiny hoof in her mouth suckling gently. The warm mess in her diaper causing her to feel sad and annoyed, so a small giggle escaped her lips happily as her big sissy was swift in giving her a nice dry one.

“There you go brat, one clean nappy.” Tiara gazed down joyously to her tiny sister, loving how cute and pudgy she was before lowering down and blowing a raspberry upon her belly.

The room exploding into giggles as Mr.Rich entered the large open nursery of his house, eyes gazing down to the foal that was once his wife. Smiling and using a gentle large hoof to stroke her mane, his glance moving to Tiara.

“So how are my two princesses?” Rich asked with a smile, the home feeling less cold and full of laughter as of late.

Yet the tiny foal felt a twinge of anger in her small heart, the word ‘Princess’ causing her to feel so fussy. Her tiny hooves kicking in place as she started gurgling and babbling aloud in anger, shards of memories coming back to her in pieces.

“Whoa! Little one, what has your diapers in a bunch?” Rich raised a brow as he leaned inward towards his daughter, the small foal grabbing the powder at her side and wildly squeezing it.

“Prrrr...wencssaawawa!” Spoiled blurted out in a fuss, the white powder exploding over Rich in a large cloud of scented dust.

“Grrr, I need to go shower again! I’m having business clients visiting in under an hour!” Tiara bit her lower lip trying to hold back laughter, her father stomping out of the room in annoyance.

“Heehee, what was that Missy?” Tiara gazed down to the foal, her tiny muzzle scrunched up as she swung hooves wildly in the air.

“Bwabababa!” Spoiled could feel the memories returning, her bright blue eyes widening in horror as the room suddenly felt huge.

What was once her study was now a cursed nursery, the foal looking down to tiny hooves in terror as she gave a loud scream. She was a blasted foal, her mind was racing with curses yet all she could do was cry.

“Milky, what’s wrong girl!?” Tiara was quick to lift her upward, the foal glaring in anger as her daughter patted her rump firmly to calm her down.

Was her child truly this dumb?

Could she not remember that she was no foal, that a mere few hours ago she was a grown mare!?

“Grrrr, wahhhhhhhh!” Spoiled lifted tiny hooves and bonking her daughter on the muzzle hard.

“Owww, brat!” Tiara spoke in a small huff herself, thinking the child might be fussy over not having a snack.

“Fine, let’s get you a snack then.” Tiara placed the baby down on her changing table, Spoiled’s eyes widening in horror as her child prepared a large pink bottle.

“Nooo...gagaga!” Spoiled wanted to scream as the towering shadow of Tiara came closer, she was not a foal and hated the mere scent of the blasted formula.

“Wahhh...mmmmm!” Spoiled was scooped up with such ease, the nipple of the bottle plugged into her mouth as she screamed internally.

“Shhhh, big sissy is here.” Tiara giggled as she held the bottle firmly in place, Spoiled wincing as tiny hooves clutched the side of the bottle trying to push it away.

Her strength fading as the larger filly held it too firmly, Spoiled groaning in disgust a she started suckling the bottle slowly and deeply. The scent of formula filling her nostrils, the taste washing over her like a skunk.

“Yay! Who's a big girl!? Who?” Tiara cooed happily to the foal, the baby moaning weakly as she couldn’t stop suckling the milk.

She hated the taste yet the more she drank it made her feel warm, her body becoming weaker as it seemed to become more and more decadent. Her eyes glaring upward to her daughter in a disgusted manner, soon not pushing the bottle away but holding it closer.

“Awww, that’s why you're a chunky butt! You love your milk!” Tiara smiled with tender love in her eyes, watching as her baby sister drank her fill.

The foal fidgeting a bit as her tummy soon became tight and round, a sense of bloated gas filling her tiny frame as Spoiled could feel it swishing deep within her. How in Equestria could she be in this predicament, suffering such humiliation as her daughter spanked her rump in quick succession.

She was a mare, not a foal!

She was elegant.

She was the talk of the town.

She was…

“Urrrrrp!” Spoiled could feel some gas escape her tummy a large burp filling the room, Tiara giggling as she placed her down upon the changing table again.

“That was a big one!” Her daughter mocked her, Spoiled could feel her cheeks burning a bright red.

A sudden pinge of gas building inside her tiny belly, whimpering in pain she fidgeted her hooves side to side. Her eyes widening in horror at the realisation, her diaper would soon be soiled the feeling of a poop coming onward.

She watched in shame as the door to the room swung open, Mayor Mare, The Apples and a few others walking inside smiling. She could just hold her breath the gurgling in her tummy growing, the sensation building inside her tenfold.

“Isn’t she just a doll!” Mare quickly hovered over her, cooing like a fool.

Her hooves started to weaken.

“Well, she is just the apple of her daddy’s eye I bet!” Applejack gave a sly wink to Rich, her soft hoof gently patting his shoulder.

Spoiled could just watch in anger, her cheeks burning a bright red color. Hooves going limp as she farted aloud, the ponies in the room cooing and giggling. This was indeed a horror show, she just wished to be back to normal.

The world suddenly growing smaller around her, the small changing table below her expanding. Becoming softer to the touch, phasing into a large velvet sofa of a study room. The world seeming to shift as her body expanded as well, hooves growing larger while her body matured.

The diaper becoming so tight around her large rump, her mane cascading down her backside. The grace of age hitting her like a truck, a larger fart escaping into the air as her cheeks burned a light pink.

The daiper filling with soiled waste as she gasped aloud shocked, laying on her sofa in a dirty pink diaper with a group of ponies watching her in complete shock.

“Mom!?” Tiara gasped in total mortified shock, her jaw nearly hitting the floor.

“Dear, why are you in a…” Filthy stumbled across his words, unsure what to say at this sight before him.

“Diaper?....But why?” Mare narrowed her eyes slowly, lost in deep thought in a matter of seconds.

Big Mac and AJ just watching in silence, both shaking their heads in disappointment.

“Well...Ahem!” Spoiled quickly got to her hooves blushing, her diaper full and sagging in the back.

“Thank you all for coming, I need to um….” Her eyes darted towards the open door in humiliation.

“....” The crowd waited for an explanation.

“....” Spoiled never gave one, darting out of the room like a blur.

She was a mare again.

Though felt as helpless as a baby.