Fluttershy was a mess with her mane frazzled and sprayed outwards, and her yellow coat was covered in a creamy batter and foal powder all over. The mare looked completely exhausted as she did everything she could to keep Big Mac clam down. The big red stallion was relentless in his tantrums making a mess out of the main living room and the kitchen. But the yellow pegasus somehow finally got the big red stallion into his bed, and he was taking a nap. Big Mac was deep under his covers with his diaper bulge clearly showing through the blankets. The big foal was snoozing away sucking his hoof sleeping soundly in his bed looking completely adorable. Fluttershy looked downward with a look of uncertainty as she watched the giant foal napping with a look of relief as she whispered, “I can’t believe I’m saying this, but I’m glad he’s finally asleep.”

Applejack came back from apple bucking, and as she rubbed the sweat from her brow she gasped at the disaster that was the kitchen, and the living room, toys diapers, batter were sprayed all over as if a tornado swooped in and just tore the place up. Applejack slowly walked upstairs cringing at every creak of the old rickety steps. She eventually made it up to the top and saw Fluttershy with her big sleeping brother and asked, “what happened down here?”

Fluttershy squeaked with fear at the sudden question and quickly looked around at Applejack and quickly lead her out of the room. She slowly closed the door so she wouldn’t wake Big Macintosh until the door was closed with a satisfying click. After that, they both went downstairs with Applejack a little concerned but acknowledging the fact Fluttershy didn’t want to risk waking her brother she followed suit. Fluttershy turned bowed down before Applejack and pleaded, “ I’m so sorry! He was such a troublemaker! I tried to get him to make an apple pie but he was persistent in eating it, and then he put up a temper tantrum then...then...he made a big poop in his diaper.”

Applejack’s face went green and gulped, “I...I’m so sorry Fluttershy…”

The yellow pegasus gave a massive sigh of relief as she continued to explain, “hey I cared for sick bears before, trust me it’s not the first time I cleaned after something so big.”

Applejack gave a chuckle,“ yeah well still, thanks again ya shouldn't have needed to do all that. Ya really went above and beyond.”

Fluttershy waved a hoof with a shy smile. “Oh don’t you fret things weren’t that bad….well besides the crying and temper tantrums. My goodness, he can be quite the big toddler.”

Applejack burst into laughter, and as she composed herself, the farm mare commented, “yeah not much different from when he was an adult. Anyways I’m done with the applebucking ya can go on home.”

Fluttershy shook her head and stated firmly. “Not a chance, I’m not leaving you here to clean up this mess.”

Applejack just shrugged and sighed, “alright, well ya can start in the living room I'll take care of the kitchen.” As Fluttershy went to the living room to start cleaning. Applejack sighed as she rubbed her head and whispered, “well I hope things can start getting back to normal soon, I don’t know how much longer Fluttershy and I can take this.”

As the two mares continued to clean downstairs for a few hours. Big Mac finally got up from his nap he could hear the two ponies talking,

“Yeah Big Mac pees so much, I swear he must have flooded his entire diaper twice while I was babysitting him and those things are huge! They're like mattresses!”

He then heard Applejack reply back, “yeah, I know ya should see him after an apple cider drinking contest. Heck I bet he could fill an entire lake with urine.”

Big Mac pouted being a little frustrated on how Applejack and Fluttershy were talking about him behind his back. The big foal got u and sat on the side of his bed looking down at his diaper now yellow and sagging between his legs. He whimpered and whined, “it’s not fair I wet the bed!”

Then seemingly out of nowhere he heard the voice, it’s alright of course it’s not your fault. It’s natural for foals like you to wet the bed.

Big Mac peered down at his doll and replied back, “yeah I know, but my big sissy and Auntie Fluttershy are being mean.”

the voice talking as if from Smarty Pants explained calmly, they’re mad at you, you need to leave and prove to those two meanies your just a little foal.

Big Mac whimpered hugging smarty pants close to his chest. “But where will I go? How will I prove to them?”

The voice whispered, “I know of a place where it’ll make you into a baby forever. But you're going to have to leave.”

Big Macintosh looked at his doll with a questionable look and asked, “won’t I get in big trouble though?”

The voice continued in a sweet but encouraging tone, “no of course not and you don’t need to worry. As a foal, you won’t get into that much trouble.”

Big Mac instantly jumped out of his bed with his saggy diaper swishing back and forth between his legs as he looked up with a determined look. “Yeah! I wana be a baby again!”

He quickly scurried over to his window and looked down at the ground below. The big stallion gulped with fear and whimpered, “but the ground is far, I gonna get a big booboo if I jump.”

The doll explained, “why don’t you use the rest of your super big diapers to help you?”

Big Mac looked over at the packages of diapers and waddled over to them. Big Mac began to rip the packages with his teeth making the packages of padding explode all over his room. With childish glee he began to tape the diapers all over his body like some patchwork of padded armor taped over each other. After what seemed like an hour, the giant red stalions was now encased in a white padded body with the little apples printed on them. The diapers crinkled and crackled with every little movement making Big Mac quivering with excitement. The big stallion bounced up and down making the mass of padding ripple as he lifted the doll and asked in excitement, “i’m ready Smarty Pants what do I do next!?”

The voice whispered, it’s time for you to go, now go to the window.

Big Mac slowly waddled over to his window and looked down at the street below. then looked down at the ground and whispered, “one...two..um...one hundred! He jumped out of the window and landed on the dirt road below using his diaper as a cushion to soften the fall. The big red stallion kicked about in glee before running off towards the Everfree Forest.

Fluttershy and Applejack were both in the middle of their conversation about Baby Big Mac. Then out of nowhere they heard a loud crash come from outside and mares looked at each other for a few minutes with wide eyes and blank expressions, then they both exclaimed at once. “Big Mac’s in trouble!”

They both burst through the front door and ran outside to see a trail of diapers leading off towards Ponyville in the night.

Applejack rolled a hoof down her face as she groaned with agony, “Ugh! There he goes again! Darn, that Big Mac he can’t stand still for five minutes!”

Fluttershy looked down at the trail of giant white diapers lining the road with the moonlight reflecting off the tapes. The mare couldn’t help but admire the scene with astonishment as she asked out loud, “why is there so many diapers?”

Applejack scoffed, “he probably used them to protect his fall, but he wouldn’t have thought of that himself, This must be something that has to do with the spirit.”

Fluttershy turned around towards her friend and exclaimed, “oh dear, we need to go after him before the poor little one hurts himself! Come on!”

She fluttered down the road as Applejack grudgingly followed behind growling, “That Big Mac is gonna owe me big for this!”

The two mares both ran along following the trail of giant diapers until they reached the edge of the everfree forest. Fluttershy gulped and whispered, “what could he possibly have to go into the Everfree forest.”

Applejack gave an irritated groan as she pulled her hat as she exclaimed, “I have no idea! but I’m starting to get a feeling we're gonna see the end of this spirit tonight once and for all now come on!”

They continued through the thicket of dead trees spooky trees following the stray diaper caught on the branches of trees here and there. It seemed like forever until they came upon a strange pool of water it was glowing with energy where big mac was with nothing left but his saggy diaper stripping it off with his teeth preparing to take a dip in the pool. Both Applejack and Fluttershy ran over as Applejack shouted, “ya stop right there young colt! You're in big trouble!”

Big Mac gave the mares a surprised look and stepped back now feeling scared and worried. Fluttershy calmly and gently fluttered over to him and cooed, “hey there it’s alright we’re just worried about you is all. What are you doing here?”

Big Macintosh hid his face behind his hooves and mumbled, “I just wana be a baby again.”

Applejack now beyond irritated at this point and stomped a hoof onto the ground as she shouted. ‘Stop this nonsense your a bucking grown stallion!”

Fluttershy gently cooed, “oh we know dear, we're just concerned that other big ponies will make fun of you if they see you in your diapers.”

Big Mac turned to Fluttershy ignoring his sister's protests as he jumped and down making his diaper squelch and squish as he chirped with excitement. “That’s why I’m here! I’m going to be turned into a foal! And I’m gonna be a baby pony forever!”

This made Applejack gaped with her mouth open unsure of what to say. But Fluttershy simply asked in a concerned motherly tone, “who told you this sweetie? Was it a spirit?”

He shook his head and held up smarty pants and exclaimed, “not it’s Smarty Pants! She told me about this pool. She said if I go in it I can be an actual foal!”

Applejack had enough as she stomped towards her brother snatched the doll as she slammed it onto the ground with a hoof and proclaimed in anger, “you listen to me ya dang spirit your messing with my brother and me for long enough! Now here's my deal if ya don’t leave my dang family alone I’m gonna smash this doll into powder!”

But the spirit possessing smarty pants cried out, “help me Baby Mac! You need to go into the pool to save me!”

Big Mac turned towards the water and was going to jump in. However, Fluttershy held him by the hoof and tried to take him back. But the big stallion was too strong as he was starting to put a hoof into the water Applejack exclaimed, “wait don’t! I’m sorry for being mean to ya. There's no need to go into the water, just listen to your big sis for a sec.”

Big mac turned around with an angry look and asked rudely, “yeah like what?”

Applejack continued to walk over as she continued to explain, “look, Big Mac, I love ya a lot and heck I would love to see ya as a cute chubby foal. But honestly, we need ya for the applebucking season I can’t do this by myself! Without ya, we could lose the farm!? Please, ya need to stay as an adult!”

He gave his sister puppy dog eyes and stomped about as he whined, ”but..but ya dun like me playing with smarty pants or wearing diapers!”

Fluttershy brushed the big stallion’s mane as she cooed, ”we like you no matter what, come back to being an adult please.”

Applejack while not satisfied with her brother acting like a foal just sighed as she yielded and grudgingly grumbled, ”yeah as long as it’s not in public.”

With that big mac smiled as turned to his doll “Well, I guess that means I’m staying as a big pony!”

The spirit cursed and screeched, “how can you do this to me Baby Mac! You were supposed to be mine!”

Applejack scoffed, “as she looked the doll over the pool. “Your crazy if ya think ya can control my big brother. Now You're going back to where ya belong!” she tossed the doll into the pool as it hollowered and cursed, “you will all pay! I swear you will all pay!” The ponies watched as the poll bubbled and fog covered the area until the pool evaporated into nothing leaving just smarty pants in the muddy hole. Fluttershy was quivering scared to death from the curses the spirit shouted. Applejack slid down into the mud hole and took out the doll as she sighed, “ya caused a lot of trouble Smarty Pants.”

But luckily the doll didn’t respond and it seemed that the spirit has vanished. As Applejack climbed back onto dry land Big Mac’s derpy face slowly changed to that of one in utter confusion as he stumbled onto the grass with a loud embarrassing squelch. He looked down at the yellowed sodden diaper that sat between his legs with embarrassment. Then he looked up at the two mares asked with a nervous quiver in his voice he asked, ”what the buck happened!?”

Applejack came over with a deadpan look as she gave an exasperated sigh and simply stated, “it’s a long story.”