Sprout was absolutely besides himself as he walked alongside Sunny as Izzy led the two of them downstairs towards the kitchen.

"So... You too?" Sprout asked, both their clean diapers crinkling behind them.

"Yeah. After spending the day here, seeing how content you were, I guess you could say I got a little curious," Sunny admitted.

"R... Really? That's it? Just eight hours of watching me was enough to make you want to try this?" The stallion asked.

"Well, yeah. And honestly, I probably wouldn't have gotten very far with it if it wasn't for Izzy. I spent the day as her 'foal' yesterday, and she asked me if I wanted to make it even more authentic by coming back over here today."

Sprout felt a prang of guilt after hearing Sunny's answer; it was absolutely true, while he was slowly getting used to this treatment and the walls of resistance slowly began to crumble during the day with his mom, Izzy was the one who came along and positively smashed those walls down with her enthusiasm and exuberance. But just because Izzy had been helping Sunny with fulfilling her curiosity, he didn't want that to downplay Sunny's outright kindness here. Even if it was with encouragement from Izzy, she was still willing to engage in this exploring this right beside him, even after everything he had done.

Sunny was undoubtedly a true friend, and he would find a way to make up all the years he had dismissed her beliefs. He could start right now by not getting sappy, and by enjoying this day with her to the fullest. If Izzy could make things as fun as she did for just him, then for the two of them, he couldn't wait to see what she had in store for two big foals. And if there was any embarrassment to be had, she would surely help them push through it.

They headed down the stairs into the kitchen, and an idea hit Sprout.

"H-Hey Izzy? You can let Sunny have the high chair if she wants, you know, since she's here for a more authentic foal experience and all," the stallion offered.

"How nice of you, Sprout. That sounds like a great idea. You heard him, Sunny. Aaand up you go!" Izzy said, grabbing the earth mare with her magic while also removing the tray from the high chair, placing her in and securing her in her seat by putting the tray back in place. Sprout took a seat right next to her in a regular dining chair, and Sunny smiled down at him, appreciating the gesture. Sitting here in this chair did inch her deeper into this headspace.

"Alright, I hope my two foals are hungry for strawberry oatmeal and waffle pieces!" Izzy said as she went to the kitchen, levitating coloring books and crayons over to the two of them to keep them occupied while she went about preparing breakfast. Ten minutes later, they each had a bowl of oatmeal speckled with strawberries, and a single waffle, cut up along the waffle iron ridges. With breakfast ready, she pulled the activities away before tying appropriately sized bibs around both of their necks, before taking a seat herself on the other side of the high chair.

Izzy had clearly been practicing with her magic in her spare time, because she was managing to spoon-feed both Sunny and Spout, along with herself, while also levitating up the occasional bite of syrup-covered waffle.

Of course, when their stomachs began to fill up with their breakfast, it restarted the digestive trains that kept on chugging towards their destinations. The unicorn, however, decided to pay their light squirming no mind, as she knew nature would take its course sooner or later. The only question was, who would be first? She was keen on keeping the spoonfuls of breakfast coming, so they couldn't concentrate on either end of their bodies for long, and thus the urgency continued to slowly build. Sunny wasn't used to her movement being so restrained in the high chair, and on the other hoof, Spout had gotten used to it over the last few days, and thus found the sudden freedom of movement while eating to be rather odd.

It worked, and they managed to hold it off until they were done with the oatmeal, waffles, and their sippy cups of orange juice. But when they were done, and were let down onto the floor, they were now able to focus on their bodily functions as Izzy cleared the table and started rinsing the dishes.

Just from glancing at each other, Sprout and Sunny knew what was to come for both of them, they each decided to turn away from each other, as looking at each other for this would have certainly been too much for them to concentrate.

Due to his experience, Sprout had beaten Sunny to the act, and they both heard the muffled fart come from the back of his diaper. That was enough to push Sunny over the edge as well, her tail hitching up as she let loose, and she remembered to breathe after the initial push this time too, as she felt her diaper fill with her warm manure. Her bladder also took this time to let go, and soon warmth was spreading out across her entire backside.

In a matter of moments, Izzy had rinsed off the breakfast dishes and got them loaded into the dishwasher, find it sufficiently full enough with those and the dinner dishes to begin a wash cycle. Satisfied with the clean state of the kitchen, she turned back to her two foals in front of the dining table.

"Alright, so what do my foals want to d—" Izzy paused as the stench hit her nose. "Alright, who's the foal with the stinky diaper?" She asked, and they both averted their gaze, as she came around the counter towards them. Sunny quivered as she was telekinetically turned around where Izzy's hoof was given easy access to her diapered backside, and upon pressing softly into it, she was met with just a light resistance.

"Well Sunny, that diaper sure didn't last long," Izzy commented, sliding her hoof further down in between her legs to also confirm the swollen wetness towards the front. "But that's what they're for. We might have to swing by the shop on the way back to the hotel to get you another pack, you stinky filly."

Half done, she made her way over to Sprout.

"Alright, mister, just because Sunny is messy doesn't mean I'm ruling you out!" She said, in a mock stern tone, turning him around with her magic and did a similar hoof check, finding his diaper just as used.

"Two messy babies! Guess you two are going to get quite acquainted with the changing table. Let's go!" Izzy said, gently pushing them with her hooves towards the stairs up to Sprout's bedroom again.

"Gets easier the more you do it," Sprout softly commented to Sunny as they made their way up the stairs. Sunny hadn't done much moving the last time with a full diaper, so feeling it shift and squish with each step was new. She was guessing Izzy wasn't going to mind whatever state it was going to be in when she got up on that table.

They got up into the room, then both of them made their way towards the changing table, followed by both of them backing off in politeness to make way for the other.

"Hm..." Izzy began, getting glances from both of them as she put a hoof to her chin. "Who to change first? Ah, I know! Let's make a game of it!" She said, clapping her front hooves together, picking them both up with her magic, moving them towards the clear space in the center of the room, before sitting them down across from each other. They both winced as the loads in their diapers spread out more from the weight of their bodies sitting down on the floor. They heard Izzy rummage through her saddlebags, and Sunny had feelings of dread and nervousness crash into each other as she saw Izzy come out with her vibrating wand, plugging it into the closest available wall socket.

"What is that?" Sprout asked, his ears twitching inquisitively.

"Y-You're about to find out..." Sunny stammered, figuring that they weren't going to have any say in this matter. Sure enough, Izzy levitated the wand over to between the two of them, and after switching it on, magically shoved them closer together so their diapers were both pressed against the bulb which hovered inches above the ground.

They let out gasps nearly at the same time as the vibrations instantly spread out across the front of their diapers.

"First one to sparkle gets changed first!" Izzy told them gleefully as the looked on.

Sunny and Sprout blushed furiously as they both knew what the unicorn meant by 'sparkle', and because of that ethereal ability of hers, there would be absolutely no hiding when it happened. They couldn't exactly pull themselves apart; Izzy's magic was constant, attracting their diapers to the wand like a magnet. Sunny closed her eyes, while Sprout kept his gaze glued down at his diaper, watching as Izzy moved the wand up and down a few inches, never keeping the vibrations in one place for long.

Sprout leaned back, propping himself up with his front legs, if only to push more into the vibrating. For Sunny, this was even more overwhelming than the first time in the hotel room, for multiple reasons; the surroundings, the infantile scents wallowing in the room, and quite obviously, the fact that there was another participant this time. She wasn't sure whose diaper smelled worse, hers or Sprout's, but that only added to the creeping naughtiness that was overtaking the two adult foals.

It was a minute, maybe minute-and-a-half, before Sprout gave a single thrust up against the vibrating bulb as his eyes began to roll up into the back of his head. Sunny noticed his legs go rigid as he took in several gasping breaths, before going limp ten seconds later, tongue nearly lolling out of his mouth.

"Sprout wins!" Izzy announced, picking Sprout up in her magical grasp, keeping Sunny firmly planted on the floor, vibrator still pressed against the front of her diaper.

'How does she multitask like this...?' Sunny was able to think to herself through her dopamine-fueled mind as she laid Sprout onto the changing table, and began untaping his diaper. She was in the process of getting him wiped down before she glanced over to Sunny.

"If you need any help Sunny, I do suppose I could turn the setting up a few pegs... But you know what I want to hear..."

Heat filled Sunny's face as she risked looking over at the diaper change on the left side of the room as she continued taking deep breaths.

"Mmm... Please... Mommy... Please..." She whined, trying to press harder into the vibrator.

With a smirk, Izzy merely glanced towards the wand, and the magical glow around her horn flickered for just a split-second, before the vibrating of the bulb became much more audible in the room, quickly followed by all-out moaning from Sunny.

Sprout wasn't done feeling all tingly, experiencing a little secondhoof embarrassment for listening to this while in the afterglow. Just like the last two times he had released into his diaper, both thanks to Izzy the first time and his own hooves in the crib the second time, he noticed that his desire to be treated and dressed like this decreased considerably. Thankfully, that never lasted long, especially with someone as enthusiastic as Izzy looking after him.

Izzy had just finished getting him cleaned up down there when he heard a short squeal coming from down on the floor.

"Well, it's about time, little Sunny," Izzy commented. Sprout was wondering if he had half-cheated with the buildup the last couple days, not having any release since that night in the crib, and based on Sunny's earlier comments, Izzy had given her this experience yesterday when he was helping the construction crew at the lighthouse. Like it mattered; in a few minutes they would both be clean and in fresh diapers.

Izzy lifted him up and slipped a clean diaper underneath him, while he let his head fall to the side, seeing Sunny recover from her release, laying flat on her back, chest rising and falling as she panted. He felt himself get set down on the diaper before being given a dusting of powder, before seeing the front of the diaper come up between his legs and taped up at the waist.

"And there we go!" The unicorn exclaimed, sitting Sprout up. Before he let himself be levitated down to the ground, however, Sprout put his front hooves on Izzy's shoulders, and leaned in towards her right ear.

"I can't believe you made her say that," he whispered, soft enough for his words to be unheard by the earth pony. "Sunny never knew her mom."

Author's Note

I'm beginning to get a very rough idea of where to take this story in future chapters, but not so much of where I'd like to end it.

Thanks for reading so far! Hope you all are enjoying.