Author's Note

I wrote this bit some short time after the actual story as an experiment. That was years ago... Never quite got around to posting it anywhere until today.
edited for proficiency

Quick prologue

Scootaloo followed the white unicorn up the steps at equal pace as she had been tailgating her friend for a short moment now with little to no conversation between them as they passed the many ponies back in town. Normally it wasn't just the two of them scurrying around town for their activities, but these days the third pony was busy helping out her sister and brother on the Apple family orchard on the outskirts of town, so only the two friends were found left to run about. This was fortunate for Sweetie Belle, she'd always enjoy their time together. Not like her friend Applebloom was ever in the way or anything, but there was always something she’d seen in her first friend Scootaloo that caught her attention – a vague something in Scoot's character that led her to think Scootaloo was a likelier candidate than Applebloom. She knew her well enough anyway to figure it was about that time to try out a peculiar activity. Having fallen in love with the idea of sharing this fun with one of her friends some few days ago, she never imagined having the day - and her friend - to herself like this, bustling inwardly with excitement each step she took.

As they reached the top, they both panted out as the unicorn filly opened up the lone door to their clubhouse. A mildly windy day and a breeze went in first, then back out the windows which let in the light for the single, sound room. The air settling, they both stepped inside and Scoot's, anxious to know, finally asked while a little out of breath, "why do we always have to run all the way here from another side of the town?" she plopped down on the wooden flooring to rest. "Maybe we should ask the owner of that shop if he could move the store closer to this side." replied Sweetie closing the door back. "Yeah but that doesn't sound like it'd be easy." Scoots claimed as she got up and started over to a saddle bag with her name on it. The little orange filly got to busying herself as Sweetie Belle wandered over to another corner of the room where a sheet had been placed intentionally placed over a small box shape... by herself from the day before of course.

Removing the sheet and opening the box revealed the contents she was so excited about. 'Scootaloo has to try one of these on with me,' she thought. Taking a good look at the items inside, there was a shaker of foal powder to one end, a container or two of wet wipes, and several large, fluffy and white diapers with adorably sizable violet tapes and laces. She put a hoof to the diapers. 'They're just so soft and comfy and cute! Why wouldn't she wanna try 'em?' she was getting anxious. 'Yes, she'll definitely wanna wear these with me, *squee* we're gonna have so much fun in these!' thought the unicorn hugging the diapers to her chest.

By that time, the young pegasus had taken the new Rainbow Dash poster out of her bag and was now up on a chair attempting to hammer it over the old one with a nail, since hoof-tacks didn't work out. Meanwhile, the unicorn in the room pulled a diaper out from her personal stash as her heart-rate was busy beating its own personal record. Sweetie hadn't really done any planning for beyond this point so she hastily braved herself to lie down onto the diaper while her friend's back was still turned. Luckily, she always did best at ignoring fear whenever her comfort items were out. And looking over to her friend excitedly hoping to surprise the filly with the sudden new apparel, her horn lit up and the diaper did as well to quietly be applied around her waist by her magic. Supposedly just like she'd done a couple days before, but this time, for some reason she couldn't seem get it on. 'Come on diaper... UGH quit slipping!...' She tried again and again but her magic wouldn't adjust right. Any ability to concentrate magic was lost, and she looked to Scootaloo again right as said orange filly suddenly lost her balance on the hoof-stool, dropping the hammer and nail to each side (thankfully out of the way). But she'd landed flat on the ground facing right towards the unicorn filly. Coming out of a short daze she looked up, hardly believing what she saw and asked, "Uumm why are you trying to wear diapers?" The unicorn could only stop and blush at that but nothing more.
Scootaloo then needed to stop herself and wonder aloud, "Wait, where did you EVEN GET THAT from??" As she knew they had come here empty-hooved.
Sweetie gave a harsh breath out, annoyed from all the struggling that ruined the predicament, she said "I'll tell you anything if you help me put this on!"