Starlight carried Cozy Glow to the castle nursery to get changed. She was surprised at how the filly wasn't crying or fussing despite her wet diaper. "See, Cozy," Starlight cooed as she floated her young charge onto the changing table. "Isn't it so much better when you stop fighting back and just cooperate? Don't you feel better now that you don't have to hold your pee in?"

"Not really. I'll never forgive you for making me pee myself!" Cozy thought but didn't say it out loud. She was just waiting for her diaper to be removed so she could carry out her escape plan. "If you and that stupid princess and her little dragon think you can humiliate me like this, you're dead wrong!"

Starlight opened up the drawer of the changing table to retrieve a new diaper, and used her magic to bring forth the wet wipes and the foal powder. "Okay," She declared as she took a deep breath. "Now, I don't want any 'surprises' while I'm changing you so before I take off your diaper, do you need to go again at all?"

Cozy shook her head. "Nope. Don't have to pee, don't have to poop. Now can we hurry this along before I get a rash?"

"What's the magic word, young filly?" Starlight asked while still using that motherly tone of hers.

The little pegasus reluctantly sighed. "'Please'?" She pleaded as sincerely as possible.

Starlight smiled. "Why of course, Cozy Glow. Just hold still, and I'll get you all nice and clean." She then used her magic to surround the wet diaper's tabs and undo them, effortlessly pulling it out from underneath the filly's soggy rump.

Seizing her opportunity, Cozy sat up and fluttered down from the changing table! "Ha, sucker!" She taunted as she stuck out her tongue before running off. "I'm free!"

Starlight Glimmer immediately took off in pursuit of her young charge! "Cozy Glow, you get back here this instant! I haven't cleaned you up yet! If you have an accident on Twilight's floors, Twilight is going to be so mad!"

Cozy just continued to run, occasionally flapping her wings in order to gain a little bit more speed. "I don't care! I can take care of myself." The filly insisted as she kept on running.

Meanwhile, in the kitchen, Spike was snacking on some gems while reading his Power Ponies comic. The same comic that Twilight had repaired after Cozy had ripped it up the night before. "What is wrong with that filly?" He thought to himself as he grabbed another clawful of gems. "Not only did she try to take over Equestria, but she also hates comics. I have half a mind to give her a piece of my mind. She's lucky to not be rotting in Tartarus right now."

Just then, the little dragon thought he heard a commotion and as a result he looked up from his comic. He was just in time to see a diaperless Cozy Glow run past, propelling herself down the hallway with her wings.

Spike just groaned as he set his comic down. "I'll catch her." He said to himself since he knew neither Starlight or Twilight were around to hear him. It was a good thing he had wings of his own now, and that Smolder had helped teach him how to use them properly.

Cozy didn't know Spike was onto her as she kept running and flapping her wings. Her eyes could see the front doors of the castle, she was so close to freedom! "I'll fly right over that stupid wire that triggers that stupid net!" She thought to herself. "Then once I'm free I'm going to figure out how to get in touch with that double crossing centaur, Tirek. He's gonna pay for ratting me out to Headmare Twilight!" Then she looked down at herself. "After I find a stream to wash off this stain."

However, just before the diaperless pegasus could approach the doors and try to force them open, she felt herself being grabbed by a pair of very powerful claws. "Hey, what the-" She began as she was slowed right down to a halt.

"You didn't really think you could run away just because Twilight's not here, did you?" Spike remarked with narrowed eyes. "That's twice in less than a day now that you've tried to do that. Do you want to be sent to Tartarus?!"

Cozy hissed and spat at Spike. "Anything's better than losing my bathroom privileges and being held prisoner here!"

Starlight came on the scene and used her magic to pick up Cozy, holding her close. "Cozy Glow, I'm sure you don't actually mean that. I know you're upset about everything that's happening, but it's for your own good and it serves you right."

Cozy shuddered and shivered. "You're not gonna spank me with the belt again, are you? That really hurt!"

Starlight shook her head. "I'm just going to clean you up and then put you in time out so you can think about what you've done, young missy," Then she turned to Spike. "Thanks for catching Cozy for me. Obviously, we'll need to be more careful from now on with her diaper changes so she doesn't pull another stunt like that."

The little dragon just shrugged his claws. "Hey, that's what friends are for. Now if you'll excuse me, I have some comic book reading to catch up on. I was right at the best part too." And he walked away.

Starlight carried Cozy Glow back to the nursery and this time she made sure the door was locked so that Cozy couldn't try to escape again. She then used magic to float over the wet wipes to clean Cozy's flanks. "At this rate, you're never gonna earn a single check mark. And that means you'll never get your potty privileges back." She scolded.

Cozy groaned and shivered as the wet wipes made contact with her flanks. "I wouldn't need to worry about that if that poopy head Twilight hadn't put that stupid spell on my diapers."

"Well it was either that or giving you mittens," Starlight lectured as she tossed the wet wipes into the trash and began powdering Cozy in preparation for the new diaper. "Besides, if you're going to keep holding things in like that, you're going to end up needing diapers. Just cooperate and you can go back to being a big girl."

The pegasus filly only spat again. "Never! You'll never break me! If I have to I'll figure out how to undo that spell myself."

Starlight just sighed as she finished the powdering job, taped up a new diaper and then floated Cozy over to a small stand in a corner of the room. She then set up a timer, making sure to place it in a spot where her young charge couldn't reach it. "I'll come back for you when the last drop of sand falls into the bottom glass. Don't even think of trying to knock it over either, because I'll know. Sit here, and think about what you've done." Then she departed, making sure to once again close the nursery door so Cozy couldn't escape.

Starlight strolled straight into the kitchen as Spike finished reading his comic. "Cozy Glow is a tough nut to crack," She sighed in dismay. "I really don't want her to end up like Chrysalis. But it seems like she just doesn't wanna listen to me."

"That filly isn't right," Spike commented. "We just have to keep up the tough love until she sees sense. Sooner or later she'll break."

The unicorn mare just sighed dramatically and strolled out of the kitchen. "Well, I'm going to go lay down and rest for a bit," Then she suggested. "Why don't you make a snack for Cozy Glow when her time out is up? And maybe make something for me too, I'm getting a little hungry."

"Great idea!" Spike agreed as he went over to the kitchen cabinets. He decided he'd make some salads, Cozy needed her nutrition after all.

But as the little dragon went about gathering all the ingredients, he took notice of an opened shelf above the fridge. Flapping his wings, he flew up to inspect it and found several containers of laxatives. An idea came to him right then and there. "This is payback for ripping up my comic, Cozy Glow!" He thought to himself as he brought down one of the containers. He would put some of its contents into Cozy's salad, the filly would never see it coming.

Time seemed to pass agonizingly slow for Cozy Glow as she just sat on that stand. She really couldn't go anywhere or do anything. With the nursery door closed and the diaper weighing her down she couldn't hope to flutter up to the door handle.

"I was so close to freedom! And then that annoying dragon had to ruin it all!" Cozy thought to herself. "The only dragon I hate more is that nosy Smolder! If she'd just kept quiet her friends wouldn't have suspected a thing. What is it about dragons that make them want to pick on a filly like me? I bet they never have to wear diapers when they do something wrong."

At last the door was opened again as Starlight came trotting in, looking much more refreshed and cheerful. "Okay, Cozy, your time out is over," She declared and then used her magic to bring the filly close for a diaper inspection. "Nope, no pee pees or poo poos. I hope you're still not holding things in. We know what we talked about."

"Whatever," Cozy remarked before her stomach began to rumble. "Is it lunchtime yet? I'm hungry!"

The unicorn mare smiled. "Lunch time is still a ways away, Cozy. But don't worry, I had Spike prepare snacks for the both of us. Of course, you know the drill, you're not allowed to feed yourself." And she carried Cozy to the kitchen, plopping her into her highchair that was previously Spike's.

Spike brought over two bowls of cut up salad. "Enjoy." He smiled and then sat down at a seat near the table. "Now to just sit back and wait for the stinky fireworks!" He thought while rubbing his paws together.

Starlight ate her salad mostly in silence, while using her magic to float over bits of salad for Cozy Glow. "This is all you're getting until lunch time, young filly," She made sure to point out. "So you can either eat this, or you can go hungry. It's your choice."

Although she resented how she was once again powerless, Cozy was too hungry to fight back. So she let Starlight feed her even though she hated it. And was it her imagination or did her salad taste weird?

Once both salad bows had been emptied, Spike took them away to wash them while Starlight unfastened a bib she'd placed on Cozy as a precaution. "See how easy it was when you didn't try to fight me?" Starlight told the filly. "Maybe if you keep this up you'll be able to get a full week of check marks and we can start potty training you again. Won't that be nice?"

"Yeah, because then I'll be back to how I was before you forced me into all of this!" Cozy protested as she was helped out of her highchair.

Starlight sighed. "Baby steps, Starlight. Baby steps. You're getting there."

But shortly after Cozy was set down again, her stomach started to rumble quite audibly. She put a hoof to her stomach as she felt it churn. "Oh no!" She cried in horror, realizing what was going to happen! And the worst part was, she was powerless to prevent it. She didn't know where the bathrooms in the castle were and even if she had known she knew that it'd be impossible to take off her diaper (assuming she could make it in time).

Starlight sensed what was happening and quickly brought Cozy out into the hallway, then turned her head so as to give the little pegasus privacy. "Just let it all out, Cozy. Don't try to fight it," She instructed. "I know it's not pleasant, but it's going to happen one way or another."

Cozy really couldn't fight the urge, especially not when her face turned bright red and her tail hiked upwards. It all happened so fast, her diaper quickly expanding and blowing up like a balloon! It felt like an eternity even though it actually lasted less than a minute. The hallway was soon polluted with the stench of her foul deed.

"Oh, you poor thing," Starlight sympathetically declared as she approached Cozy Glow. "But it's all out now and your tummy has to feel a lot better."

Spike then poked his head out from the kitchen and laughed while taunting! "Ha, my plan worked! Serves you right for being a brat!"

Cozy's eyes widened as she realized her accident was no accident! "YOU!" She roared as she looked at Spike. If not for how heavy her padding felt she probably would've run right up, tackled him and started wailing on him non-stop. "You put laxatives in my salad, didn't you?!"

Spike nodded from afar. "You're darn right, I did! Now I've paid you back for what you did to my comic last night."

The little filly growled. "Why you... you..."

Starlight Glimmer quickly intervened to break up the argument. "That's enough, Cozy Glow," And then she scolded Spike. "Cozy may not be a nice pony, but that doesn't give you the right to put laxatives in her food. You're lucky her diaper contained the mess, or else you would've had to clean it up. And you could've easily made Cozy sick if those laxatives had been stronger. So you're gonna help me change her diaper. And Twilight is gonna hear about this."

The little dragon shrugged his claws as he reluctantly came over. "Fine. I guess maybe that was uncalled for. But you should know those were the weakest laxatives we had. If I'd really wanted to I could've given her something much stronger."

Starlight and Spike both made their way to the nursery with Cozy Glow in tow. Starlight was able to use her magic to quickly undo the dirty diaper, ball it up and toss it into the trash. But Spike had to pitch in to help with wiping, which took a very long time.

It didn't help that Cozy Glow made the whole thing ten times worse by flailing and kicking with her legs. "I don't regret doing what I did to that comic, dragon," She told him. "And I'm never gonna forgive you for the laxatives or the fact that you made me mess."

Spike groaned. "You're really getting on my nerves, Cozy Glow. I'm starting to think Twilight was wrong to spare you from Tartarus if this is the way you're gonna act."

Starlight coughed into a hoof to stop the argument. "Both of you, stop it at once. There's no reason for you two to be fighting," Then she explained to Spike. "I'm gonna take care of the trash so the dirty diaper doesn't stink up the whole castle. You finish up the changing job. Make sure to use plenty of foal powder so she doesn't get a rash."

Spike gave a salute. "Will do!" And then he watched as Starlight rushed out of the nursery with the trash bag containing the old diaper held aloft and a ways away with her magic.

The little dragon set Cozy upon the changing table as he reached for the powder and the new diaper. But Cozy Glow continued to kick about and kept giving him the stink eye. "Hey, dragon, hurry it up!" Cozy ordered! "If I get a rash because of you I'm gonna cry and cry all day and night!"

At that, something inside of Spike snapped. "Ooh, that's it! I have had it with your attitude!" He growled as he picked up Cozy Glow. "If Starlight and Twilight can't get you to change your ways, no one really can."

"Oh, are you gonna spank me now too?" Cozy jeered. "You can't possibly hurt me more than Starlight did with that belt. My rump is still sore."

"Whoever said I'm going to spank you?" Spike declared as he carried Cozy out of the nursery. "Obviously, a spanking won't make you see sense, and neither will a time out." He made his way down the hallways, eventually entering into one of the castle's bathrooms as he shut the door behind him.

The little pegasus wasn't sure why Spike would bring her into the bathroom, not even as she was brought before the toilet and saw him lift up the lid. "So you're making me into a toilet brush? I sure hope the toilet's clean, for your sake."

"A toilet brush wouldn't talk back the way you do," Spike remarked as he unceremoniously moved to drop her into the toilet. "There's only one place I can think of where you'll fit in. I hate to do this to a filly, but then again you're no ordinary filly." He proceeded to press down on the lever.

Cozy felt something begin to take hold of her, throwing her about the sides of the toilet bowl as she spun helplessly about. Then the water started to pull her down as it retreated down the drain, only for it to stop once her tail had been sucked into the hole. The water flowed over her tail, but only came up to about her rump. Now she was frightened. "What are you doing?! Get me out!"

"Oh, I'll get you out alright," The little dragon told Cozy as he now stood over her with a plunger in claw. "You won't be stuck in the toilet for much longer. Twilight magically enchanted this plunger to clear up any blockage after we started having some 'issues'."

"No, please!" Cozy pleaded in vain! "You'll regret this, little dragon!"

Spike only replied by placing the plunger into the toilet bowl as he then began to push up and down, all the while keeping a claw firmly on the handle to push it down. At very long last his efforts were rewarded as he heard a pop sound, and saw the water retreat down the drain with a curly mane along for the ride. "There you go! Enjoy your new home, Miss Messy Diaper!" He declared and put the lid of the toilet down, then went to wash his claws.

However, just as Spike had finished doing so, a very angry looking Starlight Glimmer confronted him. "Spike, I can't believe you just did that. You flushed Cozy Glow!" And she remarked. "If only I'd been a few seconds faster, I could've prevented you from doing that."

"She deserved it! She's been nothing but trouble ever since she was defeated!" Spike complained. "I didn't wanna have to resort to such extreme measures, but nothing you or Twilight have been doing is working. Besides, knowing Cozy she'll make friends with the rats that live in the sewers."

Starlight only replied by using her magic to take away the plunger Spike had just used. "This plunger is far too powerful to be used," She declared. "I'm going to go rescue Cozy Glow, and you're gonna prepare a bath for her. And for a punishment, I think you can clean all the bathrooms in this castle every day for a whole month." And she raced out of the bathroom!

The little dragon sighed, reluctantly doing as he was told. "Maybe Starlight and Twilight see something in Cozy Glow that I don't," He thought to himself. "But now Cozy knows that she can't just do what she pleases anymore. If she's gonna act like a brat she'll be treated like one."

Cozy Glow, meanwhile, had struggled in vain to swim back up through the pipes that she couldn't really fit through. "Stupid dragon," She said to herself. "It's not my fault his comics are stupid. He didn't have to flush me just because I ripped one of them up."

Reluctantly, the filly had to be pushed along through the pipes until finally she tumbled out into the sewer, splashing down and landing face first. "I almost don't wanna go back up to the surface! If Headmare Twilight thinks I drowned because of Spike, he'll be in so much trouble!"

But the little pegasus ultimately didn't get a say in the matter when she saw a sewer grate be opened, and felt herself being pulled by Starlight's magic, held aloft in a magic bubble. "Cozy, I want to apologize for Spike's behavior. He's upset with you, but that didn't give him the right to do what he did."

Cozy just stuck out her tongue. "Whatever. I didn't even say I wanted to be rescued, especially not by you."

"So you'd rather stay down there with all the rats and dead fish, and get sick?" Starlight pointed out. "Sorry, but I think that's a fate even worse than being sent to Tartarus. Now come on, you're coming back to the castle with me to get cleaned up. And if you antagonize Spike again, you're going to help him clean all the bathrooms in the castle. Do you understand?"

Cozy reluctantly nodded. "Yes, Starlight."

The unicorn mare smiled. "Great! And once you're bathed and cleaned, you and Spike are going to apologize to each other for being mean to one another. And you're both going to be sincere in your apologies."

And that's exactly what happened a short time later once Cozy Glow was clean and smelling nice again. "Sorry for, you know, flushing you and all that." Spike sincerely apologized as Cozy was dried off.

"And I'm sorry I insulted your comics and bossed you around," Cozy apologized back. "So I guess if you don't flush me again, I won't destroy your comics. Deal?"

"Deal." The little dragon reluctantly agreed as he shook Cozy's hoof with a claw.