Alright, this is it. You see her laying out on the bed.
"What 'r y'all waitin' for?" she asks.
You admit to yourself, you've never felt this way about any other mare. You're in love with Applejack.
You gulp as you start to tell her your plans.
"Applejack, I-...."
Oh no! This is what you were afraid of. You blush and turn your head away slightly.
"What is it sugarcube?"
Okay, let's try this again.
"C-can we try something different tonight?"
"Why sure, I'm always up for trying something new."
Okay, here it comes. The moment of truth.
Courage, please don't fail me now.
"Can you promise not to laugh, when I show you?"
"Show me what?"
"Please, can you keep a promise?"
There is silence for a few seconds.
"This is gonn' be real embarrassin' for ya, ain't it?"
you nod slowly.
"Well, in that case, I can keep it for you."
You tell her to turn around and close her eyes. She does so, and you reach into your saddlebag. You pull out a diaper and quickly put it on the floor. You blush as you put on the powder and oil around your private area before taping the diaper up.
"Well, ah'm certainly getting mighty curious hearing all this."
"Please keep looking away until I tell you. Please!"
"Don't worry, sugarcube, I ain't looking."
You finish up the tapes and pull out a few foal toys and supplies.
"Okay, you can look now."
Applejack quickly turns back and opens her eyes.
"Now what could be so mighty embarrassi-"
She pauses mid-question as she notices the diaper around your waist.
She starts to chuckle a little bit.
"Ah'm mighty sorry, I know I promised not to laugh, but you look so darned cute in those."
You blush a little more.
"What you see here isn't.... well, it isn't everything. I- I have something else too."
She tilts her head as you pull out clothes that look like they should have been for a little colt. She blushes a little.
"You know, this ain't as strange as I was expecting."
"W-well. I-"
She puts a hoof to your muzzle.
"Hold on there, let me help you into that."
She helps you move your hooves into the foalish clothing and buttons up the flap in the back. She gives you a pat on the rear and you blush a little.
"There ya go, all dressed and cute. My, you really do look like a little foal wearing that."
You hug her, taking her by surprise, but she returns the hug.
"Thank you so much, Applejack"
"Thanks fer what?"
"For not being too freaked out by this."
"Aw, shucks, sugarcube, after the things Ah've seen, there ain't nothing that can weird me out anymore."
Your stomach growls and you blush even more.
A devious smile creeps across Applejack's face.
"Aw, is my little foal hungry?"
You nod and start to reach for the foal bottle, but she smacks your hooves away.
"I'm sorry, little'un, but we ain't got any milk in that bottle.
You look at her with a confused expression on your face. You start to speak when she puts her hoof to your muzzle again.
"But don't y'all worry, none. There is plenty o' milk right here."
She gets up and reveals to you her breasts. You stare at her lower abdomen, dumbfounded. She took this pretty well. She even went as far as offering to breastfeed you. You couldn't be any more happy. You found a mare who's willing to take care of you, and go beyond.
"C'mon, sugarcube, don't wanna starve, do ya?"
You snap out of your stupor and quickly start suckling her breasts, making her moan a little as the milk comes out. You keep nursing until she's sucked dry. She picks you up and lays you on her lap as she burps you. You blush more, but enjoy this feeling. Suddenly, your stomach starts to rumble.
"But ah just fed you, why's yer tummy growling?"
You blush hard as you look her in the eyes. Your face grows redder by the second. Immediately she understands what's happening.
"Applejack... I need to-"
"Ah know. Do what you gotta do, sweetie."
You start grunting as you try to force the poop out of your rear. Slowly but surely, you start filling the diaper with a massive load. You entire face is now red as can be. You just used your diaper for it's intended purpose, like a little foal, and with another pony watching. Applejack starts to stroke your mane and coo.
"There there, hon. It's okay, you can't help it. You're just a little foal, after all. That's why you're wearing the diaper in the first place. There's nothing to be ashamed of."
She grabs a changing mat out of your saddlebag and changes you into a fresh diaper, making sure to wipe you clean and powder you.
"There we go, all nice and clean."
She looks at the clock and notices the time is now 10:00 P.M.
"I guess we'd better be getting some sleep. Ah've got work in the mornin', and I gotta be well rested."
She puts you back onto her lap and you hug her. She smiles at you. She then starts rocking back and forth, singing a lullaby to you. You start feeling tired and eventually fall asleep.
"Well ain't you a cute one."
Applejack lays you on her bed and before she covers you up, she checks your diaper.
"Aww, my little colt wet himself. Ah guess he better get changed before he gets a rash."
She goes to your saddlebag and gets out a clean diaper, but notices something in the bag.
"What in the hay? A pacifier?"
She inspects the pacifier and notices it seems sized for a grown pony.
"It's the same color as my coat, and has mah cutiemark on it. . . Hehe, that's cute."
She changes your diaper while you sleep and pops the pacifier into your mouth. You start to suck on it without thinking.
"Goodnight, my little foal."
She tucks you in, and you have the most comfortable sleep you've had since you were an actual foal.