Kelly paled a little when she heard that her niece wanted her to use her diaper. “Isn’t there something else I could do? Maybe I could play with some baby toys.”
“No,” Katie stubbornly replied, “Babies go potty in their diapers.”
“Jen?” Kelly looked at her sister.
Jen only shook her head in response, “You made your bed Kelly.”
While Kelly tried to make up an excuse, she realized she did have to go to the bathroom badly. Kelly supposed that her body was a lot smaller, so it made sense that her breakfast was now going through faster. Kelly looked at Katie and realized that she had agreed to be her baby sister for a day, so she would be expected to use her diapers at some point. With a sigh, Kelly freed her bladder and felt her crotch get wet.
Katie giggled and clapped, “She’s doing it, mommy, she’s doing it!”
“She sure is,” Jen remarked, seeming to find the situation amusing.
Kelly smiled a little glad that she was making her niece happy. However, Kelly’s happiness quickly turned to shock when she felt the back of her diaper fill with mushy solids.
As a two-year-old's mother, Jen quickly realized what was going on, “Kelly, are you pooping?”
Katie clapped in pure joy, “Baby stinky!”
“She sure is, sweetie,” Jen grinned before walking over to Kelly, “Are you done?”
Kelly blushed at being addressed like Katie but nodded slowly.
Jen took her toddler-sized sister into her arms, “Then it’s time for a diaper change.”
“Wanna help!” Katie declared.
“You stay here, sweetie.” Jen told her young daughter, “That way, you can get ready to play with your baby sister.”
Katie nodded and walked over to her toys while Jen carried Kelly upstairs. “Geez, Kelly,” Jen remarked when they were out of earshot, “Katie can probably still smell you.”
“Don’t be mean,” Kelly remarked, her face red as a tomato.
“Sorry,” Jen remarked, “I didn’t know you’d go that far.” When the shrunken teenager refused to look her sister in the eye, a thought occurred to Jen. “Kelly, you did do all that on purpose, right? You were just a good sport for Katie, right?”
“Well,” Kelly said slowly, “It started that way.”
“Are you saying that you had an accident?” Jen asked. “Well,” she quickly added when she saw the shame on her sister’s face, “You are smaller now.”
“Yeah,” Kelly nodded.
“I guess we’ll have to watch out for that when we use the reducer,” Jen noted. Seeing her sister was still upset, she quickly added, “Hey, at least we know about now. Imagine if you’d gone home and found out with Megan around.”
Kelly chuckled, “She’d never let me live this down; if I were with Megan right now, I’d probably be riding in her doll stroller with Daisy Diaper.”
Jen smiled as she opened Katie’s door, “Well, let’s get you changed.”
“At least Katie’s happy,” Kelly noted.
“I haven’t seen her this happy since her birthday party,” Jen noted as she opened her sister’s diaper, “Oh geez, Kelly,” Jen stated, “Katie told you to use your diaper, not test its limits.”
“It was an accident!” Kelly defended.
Jen decided not to jump on her sister’s childish statement and changed her, “Let’s go see what Katie’s up to.” Jen carried Kelly back downstairs, where Katie was waiting.
Katie ran to her aunt and took a big whiff of the air, “Baby, all clean.”
“That’s right, Sweetie,” Jen remarked. “Now, I’m going to get lunch ready, so you let me know if the baby needs anything.”
“I will,” Kelly told her sister.
Jen chuckled, “I was talking to Katie,” she corrected before she walked out of the room, leaving Kelly alone with Katie.