It had been an emotionally draining conversation, but 6 year old Chloe had finally plucked up the courage to confess to her parents that she wanted to go back to diapers. Her eyes were red and it was obvious she'd been crying, but now her golden hair framed an equally radiant smile which spread from ear to ear. They'd listened and hugged her reassuringly as she spilled her heart and explained how much she wanted to be treated just like her little 3 year old sister, Sophie, and to her surprise her mom and dad had agreed to make her dreams come true. Chloe couldn't believe her luck.

There was still one small sticking point though. Buying diapers for Sophie was expensive enough on its own. Having both their daughters back in diapers full time would double that cost, and then there was going to be the extra expense of sending Chloe to the same nursery as Sophie during the day. The price was heavily subsidised for kids of the right age, but the government wouldn't pay for an elementary schooler to drop out and go back to nursery. And then of course there were some additional costs like buying Chloe a whole new wardrobe to match her little sister and swapping their single-seat stroller for a double one.

Her parents explained this to Chloe in terms which the (admittedly quite bright) 6 year old could understand, and then offered her a choice. She could be in diapers full time, like her sister, and be treated like a toddler at home, but she'd have to stay in first grade and attend school as normal. Or she could live life fully like her sister, getting treated like a 3 year old 24 hours a day, 7 days a week, but she'd have to wear big girl panties and use the potty. It was a very tough choice for Chloe who sat on the sofa with a pensive look on her face. On the one hand either option was wonderful, far exceeding what she had originally hoped to get out of the conversation. On the other hand she was frustrated that her dreams had been brought down to Earth by a simple question of money.

"Can't I just share Sophie's diapers?" she asked.
"No sweetie, then we'd just have to buy more diapers for Sophie since you'd be using them too," her dad explained.
Chloe felt silly when the obvious flaw in her logic was pointed out. "But aren't they cheaper when you buy bigger packs?"
"We already buy the biggest packs for Sophie, remember, and we try to stock up when they're on sale."
Chloe pouted. There must be some way around it, she thought, but nothing else came to mind. She sat in thought for another minute or two and was about to choose the first option when her mom chimed in.
"Call me crazy, and Chloe, you might not like this idea, but I think I've worked out how you can have your cake and eat it."
"Go on," her husband said in a slightly skeptical tone.
"First, we start putting Sophie in her overnight diapers during the day. They're slightly more expensive, but they're quite a bit thicker and more absorbent. Then-"
He cut her off. "We're not making Sophie go longer between changes."
"Of course not! Let me finish."
"Sorry."
"Right, so we still change Sophie just as often, but Chloe's older so she's not as susceptible to diaper rash, and from everything she just told us I think she'd enjoy toddling around in soaked pampers. Isn't that right, Chloe?"
Chloe blushed and looked at the floor, but still responded with an almost whispered "yeah".
"So here's the crazy bit. We change Sophie when she's just a bit wet, then let Chloe finish using each of Sophie's diapers. Every diaper change we change both girls but only need to use one clean diaper."
There was silence for a moment while everyone processed what she had just suggested.
"Well, what do you think?"
Chloe's dad was the first to speak. "I mean, it's not the craziest idea I've ever heard. Close, maybe, but it would work. It depends how Chloe feels though." He turned to look at her. "Would you really be okay with sitting in your baby sister's wet diapers all day?"
"Umm... it- it doesn't sound that bad. Kind of embarrassing... but also kind of fun." Chloe's face turned a deeper shade of red. "I'd be the only kid in nursery who's never in a dry diaper, right?"
"Yep. It's your choice, kiddo. We're here to support you whatever you decide."
Chloe hesistated.
"Nothing's going to be set in stone. If you don't like it after a week or two you can easily go back to big girl panties, although if you drop out of school then I think you'll have to repeat first grade."
"Then... I want to... um... wear Sophie's diapers."

---

It had been a couple of weeks since that fateful conversation and the two sisters - now considered twins despite the few inches height difference - were getting ready for a day at nursery. They were both sat in highchairs eating their breakfast of sugary cereal with plastic spoons, and both had their soggy overnight diapers on full display.

While their mom was in the middle of clearing the bowls and empty sippy cups away, Chloe glanced around furtively, confirmed nobody was paying any special attention to her, and lifted herself up as far as the highchair straps would allow. As her diapered bottom hovered an inch off the seat she closed her eyes and a strained look crossed her face. Moments later the deed was done and a mass of warm, soft mess filled the seat of her diaper. Lowering herself back down and opening her eyes her blush intensified as she realized her mom, dad, and 3 year old sister were all looking at her.
"Poo! Thats smelly!" Sophie exclaimed, giggling.
"Well, I better get you two changed and dressed. Come on," said their mom as she started unbuckling Sophie from the highchair.

A minute later Sophie was laying on the changing table in their shared bedroom while Chloe stood waiting, her wet and messy diaper sagging between her legs. Their mom carefully untaped Sophie's soggy night diaper and placed it to one side before making quick work of thoroughly wiping every last trace of pee off her. A dry diaper was slid under her bottom, a sprinkle of baby powder applied, and then the tapes were fastened and she was allowed to hop down with a pat to her crinkly bottom.

Next was Chloe's turn. She climbed up onto the changing table and heard a reassuring click as her mom secured the chest strap. She slipped her thumb into her mouth and started to nurse on it while her soiled diaper was untaped. It took a bit longer to get her bottom fully clean from her messy 'accident', but soon enough she saw her mom ball the old diaper up and throw it in the dedicated bin next to the changing table. Next her mom reached over and retrieved Sophie's soggy night diaper from where she'd left it. Holding Chloe's legs with one hand she used the other to slide the not-so-fresh diaper under Chloe's bottom. She then applied some fresh powder before re-securing the tapes and releasing the strap holding Chloe down. The pat she gave to the older twin's bottom produced more of a squish than a crinkle.

Chloe still hadn't got used to the sensation of being changed into her baby sister's used diapers. This one felt quite warm which meant Sophie had probably wet during breakfast. It wasn't an unpleasant feeling and Chloe certainly didn't feel any disgust. In fact it was kind of fun knowing that she was completely at the mercy of her baby sister when it came to the condition of her diaper.

Next up was clothes. Of course they were dressed in matching outfits - little sky blue dresses with matching hair bows and skirts short enough to be inappropriate on any older girl. Fortunately they were both 3, and 3 year olds don't worry about how many people can see their diapers when they bend over. When combined with the matching pink velcro shoes and identical hairstyles they really did look like twins. The finishing touch was a pink harness for each girl which fastened securely in the back, out of reach of wandering little hands. In fact it was Chloe who first asked to wear the harness, then Sophie had wanted to imitate her sister. Now it was part of both girls' regular attire when leaving the house.

The twins both had a distinct waddle in their gaits as they made the short walk to the local nursery. Sophie had previously been wearing thin daytime diapers designed to be easy to move in, but the overnight ones she was now dressed in made it impossible to close her legs. It didn't bother her much, and Chloe was deriving a great deal of enjoyment from the squishy bulk between her legs forcing her into even more of a babyish waddle than her sister. Looking from behind their mom smiled at how both her daughters were toddling along with their diapers on display, and actually the most obvious difference between them was how Chloe's diaper was sagging and obviously very wet.

When they arrived at the nursery a few other toddlers were already there and Chloe was looking a bit shy and embarrassed, although she was still smiling. Deciding to have one last bit of fun with her oldest daughter, their mom announced it was time for a diaper check. First Sophie eagerly lifted her dress up, fully exposing her diaper and grinning as she was praised for staying dry all the way to the nursery. Then it was Chloe's turn to bashfully imitate her sister and show off her diaper. It was obviously soaked, but her mom insisted on taking her time and squishing it with her hand regardless.
"I can't believe you're this wet already. You were only changed this morning," she teased, causing Chloe to let go of her dress to hide her red face.
However, she knew from experience that the overnight diapers Chloe and Sophie were wearing could absorb quite a bit more before leaking, so she felt confident letting her oldest stay in it until Sophie's next accident.

---

The morning flew by for the two twins. When Chloe started attending nursery again she'd initially been the center of attention but now she was viewed by both adults and children as just another diapered toddler. Nobody acknowledged her real age and even Sophie had started referring to her as her twin sister. They had started off playing with building blocks together, then that had been interrupted by story time followed by morning snacks.
At some point Sophie had wet her diaper but they both had to wait until the staff decided it was time for diaper checks. Chloe had also peed during story time so she was quite eager for a change. She felt a bit jealous of her sister's mostly dry diaper as they played with dolls together, although she knew she'd soon be the one wearing it.

Changing time came around and, as was becoming the norm, the twin sisters were led to the changing table together. At first Chloe had been a bit surprised that the staff were willing to go along with the policy of changing her into her baby sister's used diapers, but apparently it wasn't the first time they'd been asked to do that. It was, however, the first time they'd enforced it on a willing and enthusiastic child.
Soon enough Sophie was changed into a dry diaper and Chloe was free of her soggy burden. Once again she could feel the warmth from her sister's last potty accident and couldn't resist the urge to squish it against herself. Sophie had only wet a little bit so it was still mostly dry, making it much easier to run around and play with the other toddlers.

There was another diaper check before lunch but Sophie was only very slightly wet so neither of them got changed. During lunch all the toddlers were placed in seats which attached to the tables so they functioned like highchairs. The food was all cut up already and Chloe took great delight in ignoring the plastic cutlery and eating the pieces with her fingers.

After lunch came nap time, but while most of the kids were helping lay sleeping mats and blankets out, Chloe noticed Sophie on her own in the corner. She was about to go over there when Sophie squatted down and she realized what was about to happen. One of the nursery staff had apparently noticed too and immediately walked over to check Sophie's diaper. Sure enough, moments later Chloe was being called over to the changing table.

She could immediately smell what her 3 year old sister had done in her diaper. She watched as Sophie was lifted up on the changing table, the messy diaper was untaped and set aside, and the motherly looking woman gently and efficiently cleaned all the poop off her baby sister's bottom.
With the words, "come on Chloe, your turn," she knew her fate was sealed. A part of her wanted to protest at the insanity of changing her out of a moderately wet diaper into a wet and messy one, but another part was enjoying the situation far too much. She obediently climbed up and didn't resist as she was strapped down and her wet diaper was untaped. Despite the obvious futility the woman still insisted on wiping her down just as thoroughly as if she was being changed into a dry diaper. She tried to mentally prepare herself as her bottom was lifted up and her sister's latest hand-me-down was slid underneath. The physical sensation was actually much less bad than the smell. It was warm and squishy and kind of gross, but once the tapes were done up it didn't really feel any worse than the mess she'd made herself in the morning.
As she climbed down, feeling the poop shift around and smear against her butt, she saw that little Sophie had been intently following the whole procedure.
"Now you're the poopy one, twin sis!" she exclaimed, grinning smugly, as if she was announcing some great victory.

Next came naptime, and of course, since Sophie had just been changed into a dry diaper, there was no hope of a change for Chloe until later. Naps were one of her least favorite parts of the whole nursery experience. She was rarely tired at this time, so being forced to take a nap for an hour wasn't much fun. Taking a nap in a messy diaper was going to be even less fun, although on the other hand this was exactly the sort of infantile experience she'd been craving for years. As a form of olfactory revenge she made sure to pick the spot next to her sister.
Chloe did eventually fall asleep, snuggled up to her sister, although not before emptying her bladder into her waiting diaper.

She woke up with her hand pressed against the front of her squishy padding. She wasn't sure why it felt so good, but she continued massaging it with one hand and sucking the thumb of her other hand until it was time to put away all the blankets.

Chloe was looking forward to a change as the staff announced another round of diaper checks. She watched as they worked their way from one toddler to the next, taking some to be changed while announcing that others were still dry enough. Her sister turned out to be in the latter category. She quietly cursed the efficiency of the nursery's system as her hope of a clean (or rather, less dirty) diaper evaporated in front of her.

Wet diapers were checked and changed every couple of hours on a routine schedule, but messy diapers were changed as soon as they were discovered. That was great for her sister who never spent more than a few minutes in a messy diaper, but for her it meant she could get changed into one at any time and then have to wait for the next round of checks to get out of it, assuming Sophie was kind enough to pee herself by then. Apparently all of the juice Sophie drank at lunch had either ended up in the diaper Chloe was currently wearing, or was still working its way through her system.