“Alright, mom, I'm going out!” Aurora trotted into the kitchen and fetched the shaker bottle on the counter. She headed out the front door and paused for a moment. The hot sun blazed down on her, but a cool breeze whipped through the air, sending the leaves of the giant tree in her front yard into a windy cacophony. She breath in the cool, pine-scented and exhaled a blissful sigh.
	Her eyes traveled up the trunk of her tree and stopped at the now broken branch about halfway up. She smiled.
	Idiot.... She thought, beginning to jog toward the street.
	She moved down her suburban block, toward the neighborhood park. It was the perfect place for her to run--not too busy to feel smothered, but not too isolated to feel unsafe. Plus it was shady and smelled fresh, especially when it was breezy out. 
	She brought the shaker bottle to her lips and took a sip. 
	Mmmm, she gave the bottle an approving glance. Pomegranate....
	A decent portion of her usual jogging route was the distance from her house to the park, and then back. When she reached the park, all she had to do was circuit it a few times and then she could head back. Three circles was her usual minimum, but when she was feeling particularly energetic, she'd push it up to four or five.
	She stopped at the park entrance and took a long drink from her bottle.
	“Damn....” She said in a low voice. “This is good.” 
	It was a new supplement she'd started taking. It advertised increased energy and plenty of nutrients. She wasn't sure how much of it she believed, but she felt good, and it seemed at least slightly less unhealthy than an energy drink or soda.
	She took another sip.
	On top of being delicious. She thought.
	She began jogging again. Her eyes scanned the entrance to the park to see if they'd replaced the portable toilets yet, but to no avail.
	Not like I plan on peeing in those anyway.... She thought, with a hint of anxiety. Would be comforting to know they were there, though.
	She always made sure to hydrate extra well before going out to run, since she knew she'd sweat most of it out anyway. It usually wasn't a problem, but this particular day she'd forgotten to pee before leaving her house, and while this wasn't the first time by any means (there'd been many occasions where she'd nearly danced her way to the toilet the moment she'd walked inside), today felt... different.
	Her eyes narrowed with worry at the unusually intense feeling in her bladder. It wasn't that bad. She wasn't going to have an accident or anything dramatic like that... but she sure did have to go, and the idea of running that far with a full bladder made her uneasy.
	It's probably just the new drink, she thought with another sip. Not a big deal. I'll just have to be a little more careful with this stuff. The caffeine probably has me jittery, too. I bet I really don't even have to pee that bad. It's just the caffeine.... She forced herself to chuckle lightly.
	By the time she completed her first circuit of the park, her dire need for a toilet became the only thing she could think about. Her bladder jiggled with every step, and every jiggle made her body tighten from the sudden pulse of pressure and sensation. She took another sip and put a hand on her lower belly―which seemed to be protruding out a bit more than usual.... She frowned and looked at the nearly empty bottle.
	I should really stop drinking this now....
	Halfway through her second circuit she began panting, but not from exhaustion. Her legs kept slowing down, but each time, she willed herself to go faster, to fight against the encroaching tide. She felt like there was a balloon in her stomach filling at an alarming rate, and utterly sensitive―like something as simple as stepping too forcefully could make it pop.
	Damn, she stole a glance at her waist, taking in the sight of her blond colored running short shorts lined with a thin strip of white at the hems and pockets. It usually feels kinda good when I'm running and gotta pee, but.... I don't usually have to go this bad. Maybe I should go back soon?
	She was nearing the end of her second circuit. Her eyes moved toward the exit path to the park. She thought hard about taking it, but jogged onward.
	I've got to at least do a third round.... That's the minimum. And plus, I do feel pretty energetic from this drink. Maybe if I drink a little more it'll give me the energy to run home faster....
	She emptied the bottle.
	Her quivered from the intense desire to let go, and each step forward made her clench: between her legs, her stomach, even her arms and throat. A few times, when the steps had been particularly effortful, the faintest sound escaped from her throat. Something that felt like a grunt, but sounded like a moan.
	Gotta go, gotta go, gotta go, gotta go...!
	She picked up her pace and maintained it effortlessly until about halfway through the second circuit. She felt a warm sensation around her groin, and then a few steps later, it was followed by a small bit of moisture, and the unforgettable sensation of urine dribbling out.
	She immediately slowed to a fast-stepped walked, each step inward like a model's. 
	Why are my panties wet...? Did I piss? Did I just lose some piss???
	She swallowed nervously, keeping her steps hurried.
	It... had to be a fluke. Just a random occurrence. But... I better hurry up and get home. I don't know if I can hold this any longer.... Shit....
	The instant she began jogging again another dribble of urine escaped into her underwear. She kept up the jogging, but every step made the muscles between her legs quiver with more intensity. The wet fabric of her panties slid against her pussy as she ran, making her acutely aware of her 'mini-accident.'
	And then she felt another dribble, this one bigger, big enough to make her squeak, and big enough to startle her back into a quick-paced walk. She bit down on her lower lip and looked around to make sure nobody heard her―and to make sure nobody was close enough to see anything.
	Fuck, it's gonna get on my shorts...!
	She clutched the bottle with one hand and fervently rubbed her hip with the other.
	If I run I'm just going to keep peeing myself.... But if I don't, I might have an accident anyway. One big one....
	Is that better, or worse? A series of leaks or one big waterfall...? She shooed the absurd thought away. No. I am going with the third option: the one where I don't piss through my shorts like a little cub. I can HOLD IT.
	She swallowed hard.
	“Why didn't I just piss before I left?” She grumbled to herself, turning on to the path that led out of the park. “If I'd known this was gonna happen....”
	Her legs carried her as quickly as they could without compromising the tentative control she had over her bladder, but each step made the pang that rang out in her lower body intensify. She made it out of the park and on to the street that would lead her home, but the further she went, the slower she got.
	“This... is bad.” She mumbled. Even without the added pressure of jogging, she could feel the muscles between her legs quivering, threatening to release some unpredictable amount of pee at any time. She knew if she tried to run now, she'd lose all control the second she extended her leg. She thought back to the few times in her life where she'd felt this on edge, where she'd felt her piss this close to coming out into her pants, where each step reminded her that her panties were wet and that her clothes were next in line.
	I can't pee my pants. I am in high school for Christ's sake! Her hand slid down and rested on the top of her thigh. I don't want to do this, oh my God.... Not in public..... But if I don't....
	“Mmmm!”
	She grimaced as her muscles tightened and another small dribble of urine darkened her panties further.
	It has to be showing now. I've peed so much, I don't think my underwear can hold all this.... Damn it! I can't pee my pants I'm so close to home! I'm so... close!
	And then there was another leak, except this one didn't stop. It dribbled out at a slow pace, warmth opening up around her pussy lips.
	S-Shit.... She slid her hand between her legs and pressed down. The dribble stopped, but she felt a warm liquid on her hand as she pressed into her shorts. This is happening. This is really happening right now...!
	She moved as quickly as she could, her cheeks now flush red and her body bent forward. Don't pee, don't pee, don't pee, don't pee!
	When she reached the four-way stop that helped control traffic between the only two semi-busy streets that ran through her suburb, she came to a stop. Her hips swayed back and forth and her legs went up and down in a fervent motion. Her eyes watched the only car visible for miles meander across the intersection, as if what they were the only people on earth who mattered, as if she weren't dancing around like a child with an ocean of piss threatening to fall down her legs, as she didn't have wet fabric between her legs, gliding against her thighs and pussy with every fervent and necessary motion.
	Drip. Drip-drip-drip. Pshhur-
	“S-Shit!”
	She could feel the sudden vibration of surging liquid against her fingers, and the sudden warmth that ran back along her pussy, toward her butt. 
	She darted forward, nearly walking into the car as she moved rapidly across the street. The urine stopped flowing, but she knew if she had to stop again, that would be it―she'd empty her entire bladder in her pants, right there on the sidewalk.
	Oh my God, it's on my leg! It has to be so obvious I pissed myself by now. God, I hope I don't pee anymore. I don't want to lose it out here.... I'm so close.... I hope no one... sees....
	She moved toward her house, infrequent drops of urine slipping out, some of them she detected, others moving out imperceptibly.
	When her house was in sight, she sighed quickly and heavily and continued taking nervous, hurried steps. The pressure in her stomach continued to grow. Eventually, her muscles no longer wavered, urine just squirted out randomly, and any attempts to clench them or interfere with the stream just pushed out more and pushed her failing control even further to the limit. Infrequent drops become frequent, and then soon, the frequent drops had turned into a trickle. 
	A single droplet ran down her leg, and then a second. She tried to flex her muscles closed and she tried to push harder between her legs, but her body would not respond. Her pussy continued to twitch, larger and larger leaks slipping out into her clothes.
	“I... I can't f-fucking hold it!
	In her panic, she came to a complete stop. She looked down at her crotch, helpless, shocked. The instant she stopped, the slow stream grew in strength.
	Sssshhhuuuurrrrr
	“No....” She whispered. “I'm... I'm pissing myself.”
	Her hand slid up on to her belly. The warm piss traveled down her legs, growing more powerful by the second. She tried to flex her muscles and make it stop, but it resisted her and kept on plowing, the hiss growing steadily louder.
	Ssssssshhhrrrrrrrrrrrrrrrrrr
	“Unnng....”
	Piss exploded from her shorts now. She spread her legs as the warm liquid traveled down the backs of her thick, milky thighs and trickled into her socks and shoes and onto the hard sidewalk. She sighed heavily and tears filled her eyes―half from shame and embarrassment, half from the immense relief.
	She kept her mouth open and her eyes aimed down. She watched the piss darken the fabric of her shorts as it ran up the front and then as small bits ran down the fronts of her legs.
	I pissed myself, she thought. I really pissed myself. Wow....