Bladders are magic

It was currently late evening in Ponyville. The day had gone by, and just about everypony was in their homes, ready to go to sleep and wait for the next day to arrive. Rainbow Dash would normally be doing the same just like everyone else, but today there was a slight distraction on her mind.. although not so slight anymore. It left her bouncing and fidgeting in her room, but also leaving her in a state of arousement and excitement. In short, her bladder was full, with barely any room left to hold in any more pee.

She was about to lose it. She bounced violently in her room, her holding muscles quivering from over-usage. She was about to wet herself. She had been holding in her pee for almost two days now.. Her bladder was over-filled, fighting violently against her holding muscles to try and force the pee out. She didn't dare let up though. she couldn't lose it-- not now not ever!

She bounced up and down violently in her room, walking back and forth in desperation, currently nude for her own personal enjoyment. Despite the tremendous force being forced on her tired holding muscles, she didn't dare let them go. Her bladder reacted differently, however. It was relentless as it tried to force the pee past her quivering holding muscles.. which so desperately wanted to let go under the pressure.. Rainbow moaned, crossing her legs and squeezing, trying as hard as she can to keep her holding muscles clenched. She couldn't keep this up forever though.. her bladder kept getting fuller.. and her holding muscles kept getting weaker.

She quickly sat down on the bed, fidgeting violently as she did. She pressed her hands against her plush vagina, squeezing it. She couldn't lose it now! Not yet! She tried desperately to keep her quivering holding muscles staying clenched closed, causing her to pant in a mix of exhaustion and effort.

She lied down on her bed and squirmed, pressing her legs tightly against each other in an attempt to help hold it.. She could barely keep doing this! She continued straining her holding muscles to their limit, determined not to let herself wet herself. She didn't want to admit she could wet herself. She wanted to be the boss over her bladder and not let it control her.. So why was she wasting time in her room?

She forced herself to sit back up, moaning as she accidentally put pressure on her bladder. She wasn't going to let her bladder do this to her. She got off the bed, trying desperately to keep her exhausted holding muscles clenched. She walked

out of her room, still completely naked, her breasts and her plump pussy being shown in all their glory. She felt a specific feeling of freeness she didn't feel all that often.. and her full bladder only made the feeling more intense.

Her bladder was relentless to empty however-- spasming violently as it was over-filled. She didn't dare let it empty though. She crossed her legs, clenching her exhausted holding muscles hard, just barely managing to hold it, having been forcing her holding muscles to go too far for too long. She was over-straining them so much.. her tired, exhausted holding muscles were so weak now... they just wanted to let go and relax.. but Rainbow knew she couldn't let that happen. She knew she had tough holding muscles-- she was going to make them hold up to the task of holding in her pee. If they couldn't do that, then they were useless in her eyes.

She uncrossed her legs and started walking again, looking around. She didn't really want her bladder to get in the

way of her daily activites, but what could so do? All that was on her mind was her rapidly over-filling bladder,

making it hard to think. She could fly, but that would be too strenuous... Wait, like she cared about that anyway.

It was late evening and really dark out, so she hoped no one would see her naked. Normally she would've just went

to sleep, but unfortunately she couldn't with her bladder's constant fighting.

She opened her front door, and walked outside, feeling a little nervous. Not because she might wet herself, but

because she was naked. It was dark out, but she still felt like anyone could be watching.

'I know! I'll just fly around the Everfree Forest! No one should see me there!' She went to open up her wings, but

found they were already open, most likely due to a wing-boner by holding in her pee for so long. Speaking of pee..

She suddenly began to feel her bladder spasm, and she knew what type of spasm this was. Average ponies would

practically always wet themselves after this. She felt the pee start to go through her pee hole, her holding

muscles feeling like they were powerless to stop it. If she tried to clench, it would seem like nothing happened.

Most ponies would panic at this point and end up wetting themselves, but she knew how to prevent that from

happening. She doesn't panic, because she knows her holding muscles can hold it.

She felt the pee keep pushing through with seemingly unstoppable force, but she was not ready to let it come out.

She instantly crossed her legs so tightly it hurt, and made a fist, before jamming that fist in her vagina. She

then clenched so hard she moaned from pain, straining her holding muscles even more. She then felt the pee, it was

right there.

Her eyes widened in pain as it tried to force it's way past her holding muscles, which were seemingly screaming

out in pain now. She would not lose it-- especially not outside! She kept clenching as if her life depended on it,

not daring to let up. After a few more pain-filled seconds, the urge finally started to surpass, but she couldn't

let go just let. She knew if she did a squirt of pee would come out.

She kept clenching for a few more seconds, before her holding muscles starting quivering, but thankfully enough

time had already passed. She almost instantly relaxed, her holding muscles nearly completely relaxed now. There

wasn't any urge so the pee didn't feel like it would come out, but she still was carefull. If she relaxed them too

much the pee would come out anyway. Urge or not-- she was that bursting full.

She had also used her holding muscles to the limit, though, and they were dead-tired. Just clenching them hard

once almost seemed equivilent to doing 500 wing-ups. Based off expierence, she knew she'd be alight for awhile

now. At least she hoped. With how tired her holding muscles were, she didn't know what would happen.

She quickly tried to think about something else, however, like flying. She started flapping her wings, being very

very carefuly not to put pressure on her bladder. Normally she wouldn't of cared, but she felt that just the

smallest pressure on it would cause her to lose it in a massive burst of pee. She started to lift off the ground,

before flying over to the Everfree Forest.

On the way there she was met with a couple small urges, most likely due to the acivity, but she was able to hold

them. She kept flying for a few more minutes, enjoying the nice cool breeze across her plump vag and breasts

(Which she didn't feel that often.) Until to her ultimate dismay, she felt another one of those urges.

This time it was harder not to panic. She was in mid-air, and this urge felt POWERFUL. She wanted to land, but

there was no-where she could land fast enough. Granted she could easily fly to the ground in just a couple seconds,

but the effort she would have to put for that speed would ultimately press hard on her over-filled and

over-streched bladder, which she knew she would lose it then.

This meant she had to do it in midair, while flapping her wings. In all honestly, Rainbow didn't think she would

be able to do it. But she wasn't going to give up without a fight.

When she thought the time was right, she crossed her legs as tightly as she could, jamming her fist in her vagina.

She then clenched as hard as she possibly could-- it might've even been the hardest she clenched ever. At least

that's what it seemed like. But would it be enough?

It actually took a few seconds for her holding muscles to fully clench. They were sloggy and tired-- they've been

pushed nearly to their limit too many times. Maybe, one too many times.. Rainbow can only push them so far... those

poor holding muscles...

Eventually the pee hit her, and she gasped. She even squealed as she squeezed her eyes closed and clenched her

teeth, trying to clench her holding muscles even harder. Too hard..

The pee was literally a split-second from coming out now. She felt it right there-- her holding muscles just barely,

barely keeping it back. Any sane pony would've let them let go and let the pee burst out, and it would burst out.

So hard it'd probably be like a jet, but she wasn't like that. She was going to try as hard as she could, because

there was no way she was going down without a fight.

Her holding muscles started to weaken, but so did her urge. She realized-- she could do this! She panted heavily,

sweat completely covering her. She just had to keep clenching.. if the urge kept going away like this, she knew

she could do it. Every fiber of her being was pushed to the limit as she kept clenching. She felt her bladder

kept trying to push out the pee, but she knew she was winning. Until she realized.. she was falling.

She had pushed herself so hard she forgot to keep flapping her wings. She was falling straight for the forest.

She instantly went to flap her wings, but that additional movement-- that one additional movement.. was her worst

mistake.

She had lost it.

Pee ripped right past her holding muscles, which offered close to no resistance and literally burst out her plump

pussy, shooting out like a jet, probably going at least over three yards. She yelped in shock and stopped

flapping-- she didn't care if she fell. Holding it was the most important thing in the universe to her at this

moment. She tried to clench again, but she quickly disissed that as useless. There was only one thing left she

could do.

Her plump, puffy vagina... so smooth and lush... her folds so puffy compared to most mares. They were almost like

soft clouds.. and like the rest of Rainbow Dash, they were awesome. She wasn't used to holding it like this, but

she had trained. Trained like the rest of her sexy, toned body.. and she was ready. She was not going to use it

yet-- not like this, not outside, not ever!

She clenched her folds closed, completely covering her whole marehood as if nothing was there. The pee stopped

shooting out, briefly pooling in the area behind her folds. The small space was quickly filled though.. and her

bladder noticed this.

She moaned at the strange feeling, which was quite pleasurable. But she had to focus. She quickly started flapping

her wings again, barely managing to miss hitting a tree. She had to lower to the ground otherwise she knew she

would lose it. This was her emergency ration, she couldn't keep those sweet folds clenched for too long. She had

to get down, and use her holding muscles.

She found it hard to focus on getting down, but it was enough to be manuervable. Meanwhile, her bladder kept

spasming. It squeezed into a cone shape, trying to force the pee out, even harder than before. Her plump,

precious folds were straining to keep clenching. They weren't used to this. Rainbow moaned in pain and pleasure

as she kept sloppily gliding down, almost there.

It was beginning to become too much though. It was swollen down at her marehood.. the pee kept trying to force it's

way out, making it seem even plumper than before. Despite how sexy it must've looked, she couldn't look. Her sweet,

sweet folds were almost trembling now.. it was beginning to become too much for them..

She didn't let up though, keeping them clenched. She was almost at the ground.. she was so close... she had to

keep them clenched. Her bladder spasmed again, trying to force the pee out even harder. Her precious folds were

about to break apart... they trembled more, a tiny trickle of pee starting to come out. It was as if the dam was

at it's breaking point..

She moaned as she forced her folds to clench harder, managing to stop the trickle. They felt like they were about

to just burst apart, the pee trying to force it's way through. She squealed as she teared up, her precious folds

bulging out even further. The pee was so close to bursting out... her bladder only kept spasming, making it

unbearably worse. She was only on the last shreds of her will-power now, starting to over-strain her plump folds.

A glimmer of hope shined through as she noticed the ground come into view, however. She could do this! She could

go further than any mare as ever gone! With new-found determination, she clenched even harder, her sweet folds

pressing so tightly against each other.. She knew she could do this.

Every passing second was like pure torture. Her folds so desperately wanted to let go, but she didn't let them.

She was going to make herself do this.. no matter what. The ground kept getting closer and closer... until, to

her ultimate horror, her bladder began to spasm again. A violent one.

With the pee already mere milli-seconds from coming out, it didn't take long at all before she felt the effects.

She squealed as she felt the pee push against her folds with nearly un-stoppable force, puffing them out even

more-- too much... A small trickle of pee started to come out again, Rainbow seemingly powerless to stop it. Her

folds were too exhausted... they had been pushed over the limit.

More pee started to trickle out, drips of it going in any direction. It literally looked like a dam was about to

break. She was pushing her folds so hard they were visably quivering, more tears forming in her eyes from the

incredible amount of effort she was putting out. Her attention was suddenly brought to reality as the ground began

to come into view. Her legs were close enough to land! She could do this!

A spark of excitement and determination shot through her as she landed, her feet shakily touching down on the

ground. Pee kept trickling out through her folds however. If she tried to clench harder, it was as if her sweet

folds were unresponsive. They were truly at their limit now, but that didn't matter now. She was finally on the

ground-- she had lasted long enough!

She took a huge, deep breath, preparing herself for what she was about to do. Before she started, however, she

couldn't help but to look at her pussy-- the very thing that had kept her from wetting herself so far. Her eyes

widened in shock, and as if in an instant, she suddenly became incredibly aroused. Almost as horny as she had ever

been in her whole life. The sight of how plump and swollen it was, the pee trickling out like a loose water

spout... she so desperately just wanted to shove her hand in there and masturbate so fucking hard, but she didn't.

She would lose it if she ever orgasmed, and despite this being her fetish, she was more focused on holding it in,

even if she was hornier than anypony on Equestria. She had spent enough time looking, though, and she had to get

going with what she had planned to do.

She quickly crossed her legs as tightly as she could, and clenched her holding muscles as hard as possible.

Thankfully her holding muscles had regained some of their energy while they were relaxing, which proved to make it

easier to cut off the flow. In the process, however, as her holding muscles clenched, it not only pushed the pee

back in her bladder, but also tried to push it out. It instantly became too much for her precious folds, and they

burst apart.

The pee that was pooled behind them shot out like a rocket, literally kicking up some of the dirt that was on the

ground. This was short-lived, though, as the pee quickly ran out, only drops dripping off her exhausted folds.

Her bladder spasmed again in protest, but due to her semi-restored holding muscles, it wasn't too difficult to

hold back. After a few seconds her bladder stopped, and her urge seeming to almost magically fade away, most likely

not coming back for a reasonably long time. It was only then she realized just how exhausted she was, and she let

herself collapse on the ground, panting and being completely covered in sweat.

"Oh... my... Celestia..." She muttered to herself, before starting to smile. She had done it. She had done what

no mare had ever done before. She used her sweet pussy folds to hold in her pee, after she had lost it. She

couldn't believe how happy she was with herself. From there, she vowed to never let herself pee again. Now of

course, as much as she didn't want to admit it, she would eventually. But she quickly dismissed that thought,

smiling to herself.

Her attention was eventually brought to her lush vagina, and her eyes widened a little in arousement as she looked.

Her folds were dead tired and relaxed, laying limply to the sides, exposing the inside of her beautiful pussy. She

only stared for a couple seconds, before she came to a decision.

She had to masturbate.