"You might be able to hold it longer than Pinkie Pie, and MAYBE the other three, but not me! Most mares in the Apple Family have bladders of steel, and ah'm no exception!"
"Oh yeah? Then prove it! Let's have a competition tomorrow! We'll both drink lots of cider in the morning, and then hold it all day to see who can hold it longer!"
"Ah accept. And ah know ah'm gonna win!"
Applejack and Rainbow Dash spit on their hooves and did a hoof bump, while Apple Bloom watched from behind a tree.
Was it true that most mares in the Apple Family had a steel bladder? Was it something to be proud of? Did she herself have a steel bladder too?
...
The next day, Apple Bloom walked into the doorway where Rainbow Dash and Applejack were having dinner together, and it was obvious that both mares were in desperate need of a bathroom.
"Think you can make it?" said Rainbow Dash, fidgeting hard in her seat.
"Ah know ah can!" said Applejack.
"You two still need to go to the bathroom?" said Apple Bloom.
Applejack and Rainbow Dash turned in her direction, noticing her for the first time.
"Uh, yeah, but we can hold it!" said Applejack.
Apple Bloom said nothing and walked to her room. How long had Rainbow Dash and Applejack been holding it? How long could she hold? Maybe she'd have a steel bladder like her sister. There was only one way to know for sure.
...
The next day, Apple Bloom drank several glasses of apple juice at breakfast to see how long she could last. Applejack barely noticed how much her sister was drinking.
Then, Apple Bloom went to school, constantly checking the clock to see how long she was holding it for.
About an hour into the class, Apple Bloom felt the urge to pee, but was easily able to hold it. However, after the second hour, Apple Bloom was feeling more desperate, and did her best to hide it. However, she couldn't keep herself from fidgeting, and the other ponies noticed it.
Sweetie Belle and Scootaloo noticed it the most, but chose not to say anything for the moment.
At recess, Apple Bloom continued to hold. She could have used the bathroom of course, but she wanted to see how long she could hold it for. She was much more desperate than before, feeling intense pressure in her bladder and sweating quite a bit.
Diamond Tiara noticed how desperate Apple Bloom was, holding herself with one hoof. She didn't know that it was Apple Bloom's plan to hold it for as long as she could.
"Hey Silver Spoon," said Diamond Tiara. "Apple Bloom looks like she really needs to go!"
"Yeah, she does," said Silver Spoon.
"Let's make sure she doesn't use the bathroom all day, so she can wet herself and be humiliated in front of the entire class!"
"I have just the plan!"
Silver Spoon walked into the bathroom and stuffed the entire roll of toilet paper in it. This would clog it for sure.
...
The day continued, and Apple Bloom continued to hold it, becoming more desperate as time went on. She had never been this desperate before, and she couldn't believe how long she had held it. Maybe she did have a steel bladder. But, she wanted to see just how strong it was.
As the hours went by, Apple Bloom became more desperate, to the point that she thought she might lose control any minute now. But, she was able to hold it until the end of the class.
She walked to the Cutie Mark Crusaders clubhouse with Scootaloo and Sweetie Belle, still incredibly desperate but able to hold it in. Diamond Tiara and Silver Spoon followed them from a distance to see how long it would take for Apple Bloom to be humiliated.
"She made it through the whole class," said Silver Spoon.
"She'll still wet herself in front of her friends," said Diamond Tiara. "It'll still be totally embarrassing!"
Apple Bloom sat with her legs crossed, fidgeting and sweating profusely.
"Apple Bloom, why haven't you used the bathroom all day?" said Sweetie Belle, noticing how desperate Apple Bloom was.
"Yeah, you look like you REALLY need to pee," said Scootaloo.
"Ah heard Applejack say most mares in the family have steel bladders, and ah want to prove that ah have one too."
Sweetie Belle and Scootaloo were worried that it might not end well for Apple Bloom, but decided to let her do what she wanted. If she wet herself, it was her fault, and they wouldn't make fun of her for it.
Apple Bloom's desperation got much worse as the hours went by. She crossed her legs tighter and squirmed harder, feeling the pee sloshing inside her. Diamond Tiara and Silver Spoon watched her suffering from a distance.
After a few more hours, Apple Bloom was still holding it in but was much more desperate beyond what she had ever known.
"You know," she said through gritted teeth, "ah think I've proven how long ah can hold it for. Wait for a minute while ah use the bathroom."
Sweetie Belle and Scootaloo looked a little relieved as Apple Bloom burst out of the clubhouse.
But, Diamond Tiara had overheard their conversation, and clogged the closest bathroom already. She hid behind a corner as Apple Bloom ran into the bathroom, and groaned loudly when she saw it clogged with too much toilet paper. She tried flushing it just to be sure, but it overflowed.
She returned to the clubhouse even more desperate.
"Are you feeling better?" said Sweetie Belle tentatively, knowing that this was not the case.
"I'll be all right, I only have to hold it a bit longer."
As they did several fun activities, Apple Bloom got more desperate each time. She didn't know she could hold it this long. She eventually decided to run to the next closest bathroom, but Diamond Tiara sent Silver Spoon to occupy it before she got there, watching Apple Bloom's frustrated reaction. Apple Boom frantically danced in front of the outhouse for three minutes before she ran back to the clubhouse.
Throughout the day, Apple Bloom became even more desperate, and she ran to the third nearest bathroom, but Diamond Tiara had already slipped an "Out of order" sign on it. She ran to the second one again, but Silver Spoon was back inside it. She checked the first one again, but it was still clogged.
At sunset, Apple Bloom felt like she was about to burst. She was soaked in sweat, crossing her legs tight, and fidgeting harder than before.
"You should really go to the bathroom," said Sweetie Belle.
"It doesn't seem like you can hold it any longer," said Scootaloo.
"Ah know, but all the bathrooms are mysteriously out of my reach!"
"You could run to Sweet Apple Acres," said Sweetie Belle.
"Thanks, I'll do that!"
Apple Bloom ran to Sweet Apple Acres as fast as she could, afraid that she might lose it at any second.
She finally reached the bathroom door, but it was locked.
She knocked on the door. "Can you hurry it up? Ah need to go to the bathroom really badly!"
"Eyyyup," came Big Mac's voice.
She frantically danced for what felt like hours, before the toilet flushed, and Big Mac walked outside. Apple Bloom immediately ran into the bathroom, sat on the toilet, and began peeing.
...
Apple Bloom returned to the clubhouse, feeling more relieved than she had ever been. Not only that, but she was also excited that she was able to hold her pee for almost an entire day.
Scootaloo and Sweetie Belle could tell Apple Bloom had found her much-needed relief, but Sweetie Belle asked her if she was feeling better anyway.
"Much better! And ah held it for almost a whole day! It looks like ah really do have a steel bladder like my sister!"
Sweetie Belle and Scootaloo didn't really understand why it was so important to her, but they celebrated with her anyway.
"You mean it was her plan all along to hold her pee all day?" said Diamond Tiara, outraged.
"And we helped her achieve her goal," said Silver Spoon.
Diamond Tiara and Silver Spoon walked away in a fit of rage.