Applejack and Big Mac were busy bucking apples together a week after Twilight’s mishap of putting a “want it need it” spell on some old rag doll causing half the town to go nuts. But as Applejack was busy bucking apples into baskets, she was concerned about her brother. The other night she saw him with that same doll sleeping soundly with it like a young foal. She looked over to see her brother busy knocking apples into his basket unaware of what she knew. The mare hasn't’ said anything yet because she didn't want to upset him. But it was about time she brought it up seeing that the spirit that possessed her and Spike was still on the loose. Applejack cleared her throat and casually asked, “So Big Mac I don’t want to alarm ya but ...I saw the plushie ya sleeping with the other night. Do ya mind telling me what’s that about?”

He squealed in freight, and his face became a deep pink from embarrassment with sweat now running down his forehead. Applejack continued in a reassuring tone, “now I don’t mind ya sleeping with a doll, and all but ya should tell me if something is going on.”

He shook his head and answered with a simple. “Ey’nope.” He drifted away from Applejack and continued applebucking away from his sister. All the while bucking harder he thought to himself how Applejack shouldn't put her nose where it doesn’t belong. Then a voice entered his mind, that’s right...you don't need her permission to do anything.He nodded thinking yeah your right at least she doesn't know about the other thing.

He blushed hard thinking about his past time of wearing diapers and acting like a foal. The voice whispered. Yes, you love being a little foal and I think it’s about time you started wearing your diapers more.

Big Macintosh shivered with anticipation of wrapping his rump in a thick diaper and began to buck apples again with a faster pace wanting to get this over with. As Big Macintosh bucked away Applejack more concerned, then she before came over and stomped a hoof as she explained. “I’m being serious! As much as I accept ya in every way, it’s still uh not normal for an adult to be sleeping with a doll. Ya, not hearing voices or anything are ya?”

Big Mac shook his head and grumbled irritably, “Ey’nope.” He then went back to bucking trees with some more aggression being irritated that his sister wasn’t dropping the subject. Applejack gave a loud sigh as she stopped and went back to bucking she thought to herself that the next time she sees her brother with that doll, she’ll observe what happens to see if anything was anything out of the ordinary.

After finishing with the work by sundown, the two earth ponies began to pour the apples into the wagon and as Big Mac hitched himself to the wagon. Applejack couldn’t help but come over and gave a reassuring tone explained, “Look, Big Mac, I don’t care if ya like dolls. But if a voice is saying stuff in your head, it could be the curse that Twilight was talking about. Ya, swear that doll doesn’t have anything to do with that?”

Big Mac shakes his head one more time and stomped a hoof to the ground and replied with a simple. “Ey’nope.” He then trotted off with his head held high and went straight to the barn to store the apples. As he slowly dumped the apples into each barrel, he heard a voice in his head. Hello, Big Mac if you want you can relax in your diaper after we're done?

Big Mac pondered for a second, well granny smith is out on a date with Golden Delicious and Apple Bloom will be in school for a few more hours...but what about Applejack I don’t want her to see me in a diaper. The stallion shivered at the mere thought of his sister catching him in such a ridiculous foal garment.

The voice continued oh but we both know your sister. She’ll probably work until sundown. This is the perfect opportunity to have some fun.

The stallion blushed profoundly and stored the wagon with the rest of the farm equipment and ground a hoof in the dirt. “Your right this is a great opportunity, besides I can see if I can use that new foal bottle I bought.”

The voice continued, good idea now hurry up every second we waist here is one where you can be snug in your diaper.

Big Mac gave a slight nod and moved his way to the front of the barn. He stuck his head out and looked around the place. Far in the distance, he could see his sister still busy bucking apples. He smirked seeing an opportunity and rushed off to the house with breakneck speed. The big stallion quickly bounded up the stairs shaking the house with every step and burst into his room slamming the door and locking it behind him. As the big stallion caught his breath, he looked over on his bed and found the odd stuffed rag doll sitting on top waiting for him. He quickly picked it up and snuggled it to his chest as he cooed, “oh I missed you so much Smarty Pants!” The stallion gave his doll a kiss on the cheek then he settled it down and ducked his head under the bed and he dragged out a small wooden chest on top in black marker was written on the front of it. “Big Mac’s stuff.” Big Mac looked down at the chest with a nostalgic smile seeing this was his old toy chest from when he was a colt. Then he pulled out a dark blue package of “adult diapers” these were custom made and were very expensive costing him nearly half of his savings for only a couple packages, but the money was well spent.

The anxious stallion pressed a hoof into the package making it crinkle loudly. He bristled with tension an gently peeled the plastic packaging with his teeth and a plethora of tightly package diapers exploded from within making the stallion squeak in surprise. He dropped the packaging and watched as the diapers burst out. He blushed to see the big white plush squares fly down all over the place and were now strewn about. Big Mac couldn’t help but chuckle, “it looks like it rained diapers in here.” He quickly began to pick them up and placed the diapers into his chest. After cleaning up the mess, he took the last big diaper and placed it on the bed so he could admire it. The padding had his cutie mark a big green apple printed on the back of the diaper where it will form around his rump. He then turned the packaging over to see where the light green landing zone for the plastic tabs will sit. Big Macintosh couldn’t hold it back any longer he took the thick plastic plush square from within and hugged it to his chest smelling the familiar clean diaper scent. Satisfied with his diaper, he put it aside and then dug into his chest and pulled out a big green plush changing pad with little red apples printed on the fabric. He slowly unfolded it and laid on the ground with care then he took out a big pink bottle of fresh foal powder and sprinkled a good amount of the powder onto the innards of the diaper.

Big Mac admired his little changing station and gave a nod of approval. “This is perfect now for the hard part.” Then the big Stallion began to take the giant diaper and unfolded it and placed it onto the mat and then slowly laid his big body onto the big green changing pad. Big Mac then slowly let his rump sink into the plush fabric and the soft foal powder. Big Mac gave a deep sigh of relief feeling the hours of painful labor seem to melt away with the diaper soaking up his aches and pains into its plush interior. Big Mac pulled up the front of the diaper over his belly with his hooves and secured the diaper with the big green tabs around his waist with his mouth. After making sure the tabs were snug the stallion kicked around in his fresh diaper making sure it fit. The diaper despite crinkling stayed on snuggly around Big Mac’s rump.

Big Mac squealed in delight taking his plushie and swinging it around. “Oh my Celestia! This feels so amazing!” He then jumped onto his bed and snuggled smarty pants close to his chest feeling the diaper encased his rump in its soft pillowy fabric.

The voice laughed in his head, oh my looks like some colt is having fun.

Big Mac blushed as he snuggled his doll. “Yeah, I am! But something is missing…”

The voice continued, your new foal bottle, do you want to try it out?

The stallion burst from the bed and exclaimed, “Yeah that sounds like a good idea!” He then hurried to his chest and dug through it until he found a big glass foal bottle. It was enormous with being half the size of his body with the amber nipple already in place. Big Mac got up blushing to realize he forgot the milk.

The voice cooed in his head. “Go on and get your milk. Nopony’s here.”

Big Mac gave a small nod and slowly got up with the weight of his diaper dropping down with a loud crunching noise. With his big green apple cutie mark now printed on his padded rump. He wiggled about as he took his first few steps making loud and adorable crinkling sounds. To most ponies, this would be embarrassing, but for Big Mac, he was happy and relieved at the sound making him feel comfortable and relaxed. The big adult foal waddled though his room then went downstairs with his big diaper shaking back and forth with each step. But when he reached the final stair, he peaked around making sure no pony was there. He then crept to the fridge with only the sound of his diaper crinkling making some noises and slowly took out a big jar of milk. Then once he had the jar of milk on his back, the padded stallion slowly moved up the stairs and headed to his room. There he shut the door and quickly poured the creamy substance into his foal bottle with patience. After draining the entire jug of milk into his enormous foal bottle, by the time the jug was empty the white cream only filled his bottle halfway. Big Mac chuckled slowly taking the bottle into his hooves as he laid on his back using not only his front hooves but his back ones held the bottle as well. When he was in position the big stallion began to suckle milk from his bottle like a helpless foal.

The voice whispered. That's right my good foal keep drinking and be happy.

Applejack however after an hour of bucking apples noticed her brother has yet to return. She grumbled, “that lazy Big Mac better not be doing what I think he's doing.”

She stomped off to the barn and burst through only to see that it was empty. But every barrel inside was filled to the brim of apples, and she scratched her head and whispered, “huh thought he would be in here taking a nap again.”

She then turned her head towards the house. "unless...unless he's playing with that doll again.”

Applejack left to the house and slowly opened the back door peeking inside to see it was mostly empty. Then as she slowly went in, she climbed upstairs to find that the place was still empty yet she heard an odd crinkling noise echoed throughout the home. The mare slowly trotted up the stairs trying to make as little noise as possible until she came to Big Mac’s door. She then heard another sound an odd noise like something was being sucked on. Without hesitation she burst into the room, and upon seeing Big Macintosh rolled up in a huge diaper with a foal bottle in his mouth. Her face turned red with anger as she shouted, “First the doll now this! What the buck Big Mac!”