Another story I came up with, featuring ABDL Piper!

I don't own Percy Jackson. If I did, there'd be a lot more diapers.

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Piper hadn't always been a bedwetter. It started when her dad had his big break as a movie star, and then never he had the time for her, always rehearsing, being interviewed, traveling, etc. The sudden spiritual loss of her dad in her life left a psychological impact on her, and just out of the blue, she started waking up wet every night.

It was embarrassing and mortifying, and it was something that made her dad drift even further away. With his career now taking off, he couldn't afford to have it bogged down by a bedwetting preteen. Besides, he didn't even think it was genuine, thinking Piper was peeing herself at night to get his attention, and he became determined not to give in to her, merely pawning the problem off to his secretary, the mean lady Jane, whose solution to Piper's bedwetting was to buy a massive bulk supply of Pampers Underjams, and she made sure Piper was wearing one…

…at all times.

She twisted her reasoning around very easily. Wearing at night time was obvious, but for the day it was stated that with an Underjam on, she could spend all the time she could with her dad without worrying about bathroom breaks, and for the odd long trip, it was in case she fell asleep in transit. Didn't want to risk ruining the seats of the plane or travel van.

Tristan, Piper's dad, agreed wholeheartedly, finding no reason otherwise for Piper to always be wearing an Underjam. Since he was of the mind she was peeing herself on purpose, it was a suitable punishment.

Piper hated it with a burning passion…at first. Someone her age, wearing a glorified diaper? Waking up every morning with it being wet? Jane periodically asking her if she was wearing her "special undies," periodically asking her if she needed to go potty, or if she needed a change.

It was humiliating, infuriating, and after a while, fun. The newfound attention she received got to her, and the Underjams themselves didn't feel bad at all. They were quite comfortable, really, and she particularly loved the design with the eagle on it, as it reminded her of the Cherokee stories was told as a smaller child.

The Underjams became a mainstay, with Piper sometimes wetting during the day on purpose just to get at Jane. There was even one time when Jane really pissed Piper off, and the daughter of Aphrodite pooped herself, and made sure her dirty Underjam found its way to the secretary's office, where it stank the whole place up for over a week before Piper was able to smuggle it out and into a trash bin.

Piper even got away with it, too.

However, with the Underjams no longer serving as the deterrent they were meant for, the endeavor was dropped, and the remaining Underjams Piper had were thrown out, much to her chagrin. That's when she started doing that weird little thing of hers where she told people what to do and they did it.

Hidden about Piper's room were several dozen various pull-ups, as she experimented with all the kinds she could get her hands on. By that point, her bedwetting had faded, and now Piper realized she could use her voice to get the attention she wanted.

Which was how she ended up at the Wilderness School, which was how she ended up at Camp Half-Blood, which is how she ended up saving the world.

During that whole time, she couldn't wear any pull-ups, on account of them all being in California, and she had much bigger things to worry about than some diapers.

However, that time was now over, and she got to be her secret self again. She had confided in Jason eventually, and the son of Jupiter found it very odd and strange, and firmly asserted that he wasn't ever going to be wearing one, and he wasn't going to be changing any pull-ups, either, not wet ones, and especially not messy ones.

Piper had honestly been hoping for a little more support than that, but that was a lot better than what she had been expecting. However, she still wanted somebody she could "play" with, and she found that person.

"I know this is the fifth time I've said this, but thanks, Annabeth."

The blonde smiled. "No problem. Besides, you look super cute like that."

Piper was wearing a Hello Kitty tee and a pink, pleated skirt. And of course, beneath that skirt was an Underjam.

They didn't fit like they used to, and if she wore them too long the sides started to tear apart, unlike Goodnites, but the Pampers Nighttime Underwear held a special place in Piper's heart.

"Thanks. Ready?"

"Show me what's in your bag, first."

Piper grinned, reaching behind her in the driver's seat to get the little girl's backpack with the Disney Princess design on the front. She set it on the middle console and unzipped it.

"I've got an extra change of clothes in case mine get dirty. Some wipes, baby powder, a changing mat, and some extra Underjams in case I have an accident."

"How many extras?"

"Three."

"Good girl!" Annabeth praised, making Piper blush. "You're so prepared!"

"Mm-hm."

"Let's go, then."

Piper and Annabeth exited the former's car, Annabeth shouldering the makeshift diaper bag. Together, they entered the mall and had a blast, going from shop to shop, trying on clothes, buying things they didn't need, watching people, and of course, making sure Piper didn't have any accidents with Annabeth asking every twenty minutes if the charmspeaker needed the potty, and every three minutes after that lifting Piper's skirt to check and see if her Underjam was wet or dirty.

Piper stayed dry, but she did have to change into a new Underjam because the sides on the one she was wearing were coming undone. After having lunch at the cafeteria, and some more walking around, Piper's body started to work.

In her limited experience, walking and peeing at the same time was hard, as was pooping and walking. Even standing still, it was hard to her muscles working, trying to overcome all that potty training that told yourself to only expel waste when sitting down on a toilet.

Still, Piper managed to wet herself.

It was in Victoria's Secret, they were both looking at lingerie sets to surprise their boyfriends with down the line, when they were ready for that point in their relationships, when Piper's bladder sent the signal. Taking a breath, she did her best not to make it obvious to Annabeth she was peeing herself.

The daughter of Athena wasn't fooled however, and knew right away when Piper started peeing. She had two little stepbrothers, after all, and had stuck around long enough to observe their toilet training, so she knew what a person peeing in their diapers looked like.

She waited for five minutes, pretending not to have noticed Piper's accident, and then she struck.

"Okay. I think it's time we go to the potty."

The young clerk looked up with an odd look on her face, and Piper flushed as Annabeth began their role play.

"Okay…"

Annabeth led Piper to the mall's restrooms, leading the younger girl into the family bathroom, locking the door behind her. There were some looks that followed them, two girls going into the single bathroom together, but there was nothing they could do. Annabeth grabbed one of the seat liners and set it over the toilet. "Alright. Time to go potty. Do you need my help taking your skirt and special undies down?"

"No…" Piper said hesitantly, on purpose as per their role play.

"Piper." Annabeth said sternly, "Is there something you want to tell me?"

"No…"

Annabeth snapped a fingers and pointed down at her feet. "Come here right now, young lady."

Piper slowly obeyed, and her heart skittered when Annabeth yanked up the hem of her skirt with authority, and let out a mock gasp.

"Piper Grace McLean! You had an accident!"

Grace wasn't actually part of her name, but the additive, and Annabeth's tone, had the wise girl seeming like a cross mother with so much convincing that Piper honestly felt like a naughty toddler in trouble.

"I'm sowwy…" she Piper lisped.

"Sorry doesn't cut it young lady. I asked you multiple times today if you needed to go potty, and you still end up peeing yourself. We'll be talking with your father about this when we get home."

They almost laughed at that one, but they maintained character.

Annabeth tore the sides of Piper's wet Underjam, and jabbed a finger at the toilet. "You'd better finish whatever business you have left, because it's back to diapers with you if you have another accident on the way home."

Piper sat down on the toilet, the paper crinkling beneath her, and a steady plopping could be heard as she pooped in the potty like a big girl.

Then Annabeth inspected the Underjam seat, and gasped, this time a little more genuine. "Piper Grace McLean! What is this?!"

"I don't know…"

In the seat of the Underjam, right where Piper's butthole would be, was a very garish skid mark. Long, wide, brown, and stinky.

"Well, to me, it looks like evidence you don't know how to wipe your butt properly after you poop, and I know that I've showed you how to wipe. So, what is this?"

In truth, the last time she did poop, she actually hadn't wiped her bottom, not with toilet paper. Instead, she had used that particular Underjam, putting it on, and then using her hand to push the seat up into her butt to get it all dirty.

All for the sake of a little extra spice to today's play.

"Brown marker…" Piper defended pitifully.

"Brown marker?" Annabeth asked with a pointed brow. "Was it a brown marker with poopy smell to it?"

"Yes."

"Really? Where did you get a brown marker with poopy smell?"

"Found it…"

"Found it where?"

"Somewhere…"

"Piper Grace McLean, if you don't tell me the truth right now, I'm going to wash your mouth out with soap."

"…I didn't wipe my butt good the last time I pooped, and my undies got all stinky…"

"Obviously. We'll be having a chat with your father about this. Are you done pooping, young lady?"

"Yes, Mamma."

"Done peeing?"

"Mm-hm."

"Can you wipe yourself or do you need my help?"

"I can do it."

"I'll be checking your diaper when we get home. If there's another stain in there…"

An empty threat, but it was all in good fun. Annabeth wouldn't actually touch Piper's lower extremities like that. They had both their boyfriends on second base as it was, letting each other go to third like that would be a betrayal that didn't sit well with them.

Piper cleaned herself up, and Annabeth held open the last Underjam, helping Piper put it on and slide it into place over her butt.

"Just a sec."

Annabeth grabbed a handful of wipes, and promptly dumped them into the back of Piper's Underjam, making her wriggle at the cold moistness that suddenly touched her body.

"There. That should help with any more stains. Come along. Time to go home."

The walk out to the car was a little awkward for Piper, with the added bulk of all the wipes inhibiting her legs, giving her a slight waddle. The bulge in the seat from the wipes also made it look like she had a big load of poop in her pants, something that caused a few heads to turn in the mall and a few whispers to pass between ears and lips. Sitting down in the seat also felt weird.

"That was awesome," Piper gushed. "Thanks."

"Oh, we're done yet. There's a surprise at home for you."

Curious, yet knowing she would get nothing from Annabeth if she asked, Piper turned the car on and drove home well over the speed limit, but she knew where all the cops were in the first place, so she wasn't worried.

Pulling up, she didn't see anything out of the ordinary. Putting the car in the garage and entering the house yielded no discernible results, and then she heard the clearing of a throat, and turned to see Jason sitting at the bar in the kitchen, very stern, and very unhappy.

"Young lady, your mother has told me all about your accidents today, and I am not happy. You are in big trouble, Piper Grace McLean…"

The daughter of Aphrodite gulped, not prepared to encounter a cross Daddy Jason!

To be continued?

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Hop you liked it!

I will continue it and make it a short story if someone wants me to.