When Cozy was brought back to her nursery a short time later, she was surprised to discover just how much had changed in so short a period of time!

That "Good Day Scroll" that doubled as a potty chart had been hung up neatly in a corner of the room near the closet for all to see. The crib's sheets had been changed to look more like something a child Cozy's age might have with a mobile that had seen better days high above it. A cream colored stroller sized up for a pony of Cozy's size was parked by the changing table. There were several onesies and one piece pajamas stylized in all kinds of foalish designs. And even a sized up foal swing.

"Do you like it, baby?" Twilight cooed. "All of these were donated to me by my parents, and I sized them up just for you. Isn't that lovely?"

Cozy made a face and stuck out her tongue. "I hate them all! They're so stupid and embarrassing! I can't believe you actually went and did all of this."

Twilight only cooed more as she laid Cozy upon the changing table. "Aw, come on, Cozy. This is so I can keep you out of trouble. I wouldn't have to do this if you just cooperated instead of doing what you did to Spike and Diamond Tiara."

The little filly only responded by pouting. "They totally deserved it. I don't care what you or anypony else says, I'm not going to be some stupid diaper baby just because you want me to be!" And then she complained. "You don't have to check my diaper, I'm dry."

"Are you sure about that?" The young alicorn replied as she sniffed the air. "Because I thought I smelled something stinky," After sniffing around a bit and pulling down Cozy's diaper for an inspection, however, she declared. "Hm, must've just been my imagination. Or maybe you just had gas," She then lifted her young charge off the table, floating her to the crib while dressing her in one of the one piece pajamas. "Now, you just be a good little foal and take your nap, okay? I have a foal monitor, so you can let me know if you need anything."

"And how do you know I won't try to escape again? I did it once before." The pegasus protested.

Twilight grinned. "Oh, you wouldn't dare. I don't think you'd want anypony to see you like this. Besides, I've enchanted your pajamas just like your diapers. If you try to escape they'll trap you right on the spot and prevent you from moving," Then, after kissing the filly on the forehead she declared. "Sweet dreams, Cozy. Maybe when you wake up you'll be a nicer pony. And if not there's always tomorrow. We've got a whole month to fix that bad attitude of yours." And with that she turned off the light and closed the door.

Try as she might, Cozy couldn't muster up the wing strength necessary to fly out of the crib. Besides, her rump was sore all over from the spankings she'd already gotten today and she didn't want to receive any more. "I guess I don't have a choice," She thought to herself. "So what if I'm not behaving like a 'good girl'? Pretending to be nice just made those creatures suspicious and jealous of me because I was more popular than they were." And so it was that she reluctantly drifted off into a deep sleep.

As Cozy slept, Twilight got a chance to hear back from Starlight about how things were going at the School of Friendship. "It looks like almost everycreature's gotten back into a normal routine now, especially since finals are approaching in about two weeks."

Twilight's eyes widened in realization! "Oh my gosh, I'd completely forgotten with all that happened with Cozy Glow! I still have to finalize some of the exam plans, and make sure Cozy didn't sabotage what I'd already let her help me with."

Starlight couldn't help but question. "Why did you let that filly become your helper at the school in the first place, Twilight?"

The young princess confessed. "She started doing so well in all her classes, and she told me specifically she wanted to be helpful. I couldn't just keep having her do odd jobs like book stacking all the time," She put a hoof to her forehead. "Oh, if only I'd been paying attention, maybe I would've noticed something was wrong with that filly before it came to all of this."

Starlight quickly reached out to put a hoof around her former mentor. "Hey, Cozy Glow had us all fooled, Twilight. She did a pretty good job of hiding her true intentions from us just like she's been really good at holding in her need to go. But just like when she has her accidents, the truth about her is bound to come out sooner or later."

"Even so, I'm gonna have to get back into the headmare's office tomorrow to catch up on the workload. And there's no way I can leave Cozy alone with Spike after what happened today." Twilight declared.

"I'm afraid I'm gonna be busy tomorrow too," Starlight informed Twilight. "There are still a few students in need of counseling, and teachers for that matter."

At that Twilight forced back a gulp as she realized that meant there was only one thing she could do. "I'm gonna have to take Cozy with me into work. It's the only way I can be sure she won't get into trouble." And she then thought to herself. "Guess it's a good thing I got that foal swing when I did."

From then on through the rest of the day, little else unfolded. Spike mostly avoided Cozy Glow while he continued to devote himself entirely to his punishment. That left Twilight and to a lesser extent Starlight to deal with the padded pegasus, who seemed to have more or less resigned herself to her fate (though it was too late to take away the marks on her scroll/chart).

Night time eventually rolled around, but Cozy was still dry when Twilight tucked her charge in for the night. "Cozy, it's okay to use your diaper. It's there for a reason."

"I'm not using it and you can't make me! I only did it today because I was forced to by Starlight and that poopy head Spike!" Cozy hissed. "And if not for the stupid spells you put on my diapers, I'd rip them off and tear them up!"

Twilight rolled her eyes and stuck a baby blue colored pacifier into the filly's mouth. "I think that's enough out of you for one day, missy. Hopefully tomorrow you'll be a little bit nicer."

In protest, Cozy rolled over on her side and threw the blankets over her head. She was fast growing tired of this treatment and resented how she was powerless to escape it. This was going to be a very long and agonizing month. Yet she was also thinking to herself. "This isn't as bad as my actual foalhood was. Never thought I'd say that."

The next day dawned and Cozy was woken up not by the rays of Celestia's sun (which she ignored) but by a somewhat delicate hoof prodding from Twilight. "It's time to wake up, Cozy Glow. We've both got a big day ahead of us. I'm going back to school."

"And leaving me with that little dragon of yours," Cozy muttered through her pacifier. "He'll probably just toss me out on the street and be done with it."

"Spike's learned his lesson," Twilight protested as she used her magic to scoop Cozy up. "Besides, he's still busy cleaning all the bathrooms in the castle. There are a lot of them. And since Starlight's going to be working at the school as well, you're going to be coming with me."

At that the padded pegasus pony became frightened, squeaking as she fluttered into the air! "No! I don't wanna go back there! All those creatures will surely mock me and make fun of me if they see me like this!"

"And if they do they'll answer to me," Twilight firmly insisted. "This is not up for argument, Cozy Glow. Until I know I can trust you I can't leave you in anypony else's care," She fluttered up to pick up the filly, and brought her gently back down to the ground. In the process she noticed something Cozy had apparently not realized yet. "We'd better get you changed first, no telling how long you've been in that damp diaper for."

"WHAT?!" Cozy gasped as her moderate scarlet eyes fell upon her padding, taking notice of how the patterns had faded (of course they were those stupid diapers with wetness indicators)! Now that she thought about it, the filly thought she'd heard a hiss in her sleep at some point but had thought little of it. Yet now she had apparently wet herself just like a foal would, completely unbeknownst.

The princess wasn't bothered though, she just set to work on getting her charge cleaned up and ready for the day. "It's alright, foals wet themselves in their sleep sometimes, especially when they try to hold it in for too long. Didn't yesterday teach you anything?"

The pegasus just grumbled and cursed under her breath the whole time she was being wiped and powdered. "I can't believe I did that! The last time I had an accident in my sleep I was three!" She thought to herself, though a small part of her was glad to be rid of that cold, damp and clammy feeling that she'd begun to develop before the change.

Once the old diaper was balled up and tossed into the trash, and Cozy was in a spotless diaper once again, Twilight began to pack up some supplies from the nursery to take with her to the school. Most of them were just things like wipes, powder and extra diapers. But it did also include the sized up foal swing, a few jars of foal food, a plastic spoon and a bib. "This way I won't have to teleport back to the castle to get you food." She cooed again.

Cozy just made a gag face. She really hoped she wouldn't have to eat any of the surely foul tasting stuff contained within those jars. Bad enough she'd surely be in that foal swing for who knew how long?

Fortunately, some normal food was on the menu for breakfast as Cozy briefly caught a glimpse of Spike who was taking a break from his punishment. The little dragon didn't bother to say anything to Cozy Glow as he looked at her with a glare, but it was clear he still didn't like her and hadn't forgiven her for ripping up his comic book the other day.

Well, that was okay. As long as Cozy never had to talk to or give that dragon another thought anytime soon that was fine by her. There was only one dragon she was at all colder towards, a dragon who had teamed up with some other creatures just to stop Cozy from achieving her goal.

Those were the creatures Cozy hoped to avoid being seen by today. Considering how Spike had retaliated against her who knew what those creatures would be capable of if given the chance?

It seemed like good fortune on Cozy's part when the filly was brought in to the headmare's office without any of the School of Friendship's students spotting her. But her good fortune ended once the doors to the office were closed and Twilight brought out the foal swing, setting it up near the headmare's desk. "I've got a lot of important paperwork that needs to get done today, and I don't wanna risk you wandering off or causing trouble," She instructed, before patting the filly on the forehead. "Don't worry though, I won't forget about you. I made sure to pack plenty of toys for you to play with."

Cozy frowned. "I'm not playing any stupid foal toys!"

"Then you can just bounce in that swing and keep yourself occupied, okay baby?" Twilight instructed.

Reluctantly, Cozy obeyed, more so because she didn't want to go out in the school's hallways and risk anyone spotting her in a diaper than any desire to do what the princess told her. It was so frustrating and humiliating to basically be held captive like this. "This really is worse than being stuck in Tartarus!" She thought to herself. "Maybe once I find a way out of this predicament, I should make Princess Twilight wear diapers all the time and see how she likes it!"

Twilight, convinced that Cozy was under control, set to work on the various tasks that she wanted to tackle today. "Once finals are done I should have all the time in the world to devote to Cozy's punishment," She thought. "I just hope it'll be enough time to keep her from being sent to Tartarus. I don't know how I'd ever explain that to her parents, assuming she has parents." She paused briefly to make a mental note to look further into Cozy's potential parenting problem at a later date. It might offer some clues on how to correct Cozy's behavior in the present.

As for the captive padded pegasus, she occupied herself over the next several minutes by thinking about all the ways she was gonna get back at Twilight, Spike, Starlight and most of all those six creatures for what they'd done to her. She thought so much about these scenarios that she didn't seem to notice she was subconsciously bouncing up and down in the foal swing like an actual foal would do.

However, the silence that had befallen the room as a result of both occupants focusing on their own situations was suddenly interrupted when there was a knock on the door. "Headmare Twilight?" A familiar male voice called.

Twilight looked up from her work. "Yes?"

"Is it alright if I come in? I wanna know why you haven't been teaching classes here the past few days, and I just found out you were coming back into the office for the first time since what happened with Cozy Glow." The male voice called again.

Twilight paused and bit her lip. What should she say? She knew who the voice belonged to and she knew they probably weren't going to be satisfied without getting an answer. After thinking over her options for a bit though, she decided that this could serve as a good teaching moment for both Cozy Glow and for the student she was about to see. "You can come in if you want, but you have to promise me that you won't tell anycreature about this."

The door soon swung open and then shut again as a familiar earth pony colt with a coat the same yellow color as sand on the beach strolled in. "Tell anycreature about what?" He asked, before the colt's sea green eyes fell upon Cozy Glow and grew wide in disbelief.

Cozy, for her part, eeped and tried in vain to cover up her diaper! Her secret wasn't a secret anymore. "Leave it to that good for nothing Sandbar to be the first to find out! He always stuck his nose where it shouldn't be. All he had to do after I convinced Chancellor Neighsay to lock up his friends was to stop asking questions." She thought to herself.

Sandbar's response to seeing Cozy Glow was to put a hoof to his muzzle and try to stifle a laugh. "So Cozy, are you... you know... 'cozy'?" He seemed to tease with that grin forming on his face.

"Shut up! It's your fault I'm in this mess!" Cozy whined! "You and your pathetic friends!"

Sandbar only shook his head. "My friends aren't pathetic, Cozy Glow. We did what we had to do to stop you. You were a bad pony. And we didn't have any involvement in how Headmare Twilight chose to punish you," He was quick to point out. "You're actually pretty lucky. I thought for sure you'd be turned over to the royal sisters and thrown into Tartarus. I hear it's not a very nice place."

Twilight was quick to explain. "Well, I was able to persuade Princess Celestia and Princess Luna to let me have a chance to try and change Cozy Glow's behavior, even though so far I've mostly been changing her diapers."

The little pegasus just stuck out her tongue. "And I've hated every moment of it. I can't believe I've been forced into this."

Sandbar only smiled. "Why? I think you look cute. You kind of remind me of my baby sister, Coral Currents," And he teased. "I'd invite you over for a playdate, but I don't think Mom and Dad would want you hanging around her and being a bad influence."

"Stop treating me like I'm a two year old! I'm not!" Cozy protested and whined.

"Hey, if the diaper fits, wear it!" Sandbar pointed out. "Headmare Twilight clearly wants you to change your ways, and I think that would be a great thing for you. I'll bet even my friends would like you if you apologized for all the nasty things you said and did to them."

The padded pegasus shook her head. "As if. I know what they really think of me, and I don't care."

That left the earth pony colt feeling a little confused. "Why not, Cozy? It's not a bad thing to be mindful of how other creatures view you. After all, part of friendship involves understanding how your friends think and feel. How is it possible we attended the same classes with Headmare Twilight, and yet you seem to have not learned what friendship truly means?"

The pegasus filly merely snipped in response. "Why do you care? We hardly even knew each other. You never bothered to include me in your circle of friends."

"You seemed to have no trouble making friends on your own," Sandbar pointed out. "It didn't take much for you to convince the school that you were right and Chancellor Neighsay was wrong. You could've used that for the greater good instead of trying to take over all of Equestria."

Cozy only frowned, turning her head. "Whatever. You got your laugh, so you might as well leave now. And in a month you'll never have to worry about me or give me another thought ever again."

Sandbar only sighed, shaking his head as he turned and trotted away. "You just don't get it, do you, Cozy? True friendship isn't about power or control." And with that he soon departed the headmare's office.

Twilight then turned to Cozy. "Sandbar has a point, you know. You really should listen to him."

But Cozy was in no mood to agree. She just went back to bouncing in the foal swing. "A pony like Sandbar could never understand what it's like to be me, no one could. Not everypony's lucky enough to live in the friendship capital of Equestria and make friends with strange creatures nopony really understands much." She thought to herself as a hint of jealousy began seeping its way into her thoughts.