"Sure!" Tina says. She turns to Tonya and hands her a hundred dollar bill. "Go buy a diaper bag and stock it with all the supplies Leah will need. Then take her to the family bathroom and change her into a diaper."
"Uh, me?" Tonya asks, taking the money hesitantly. Tina nods.
"Of course! I want you to be Leah's babysitter until we get this all sorted out. There's no one I trust more than you to take care of her."
"Oh!" Tonya blushes. "Okay." She looks down at Leah. "Come with me so you can provide some input on what we get." Leah nods.
"Come back after she's changed and we can make plans from there," Tina says. "I'll be in the food section."
"All right." Tonya grabs Leah's hand and brings her to the baby supply section of the store. Leah chooses the most mature diaper bag she can; a non-patterned seafoam green. She also chooses some plain training pants and diapers in her size. Tonya selects the rest of the supplies based upon what brands she likes the best for the babies and toddlers she watches. When her cart is filled with new things for Leah, Tonya places Leah in the seat of the cart. Leah squeaks unhappily at the mess spreading over her butt.
"Tonya!"
"I forgot, sorry. Try not to mind," Tonya says. Immediately, Leah stops caring about sitting in heavily used training pants. She's perfectly fine waiting as Tonya checks out and then heads for the family bathroom. They enter and Tonya locks the door behind them. Tonya goes to remove Leah's clothes, but Leah slaps her hand away.
"Tonya!"
"Are you embarrassed?" Tonya asks. Leah nods. "Well, it sounds like your stepmom is planning on me doing this a lot, so you might as well get used to it." Leah scowls as she feels her embarrassment and shame disappear.
"You commanded me again!"
"Sorry. But I'm not gonna reverse it. Honestly, it's better for you to not be embarrassed about this. It'll go faster." Leah steams a bit, but she can't deny Tonya is right. Tonya undresses Leah and when she's fully naked, wipes her down, then instructs her to go sit on the toilet and empty as much as she can before she gets diapered.
Leah is somehow able to push out a few tiny logs of poop, but most of her toilet use is in the form of peeing. When she finishes, she wipes herself and hops off. Tonya then picks her up and places her on the changing table. Leah knows she should be embarrassed by this, but Tonya's command is too strong. She just stares up at the ceiling while Tonya changes her into what will undoubtedly be the first of many diapers. Her cute overalls managed to avoid getting any mess on them, so Tonya redresses her in her new toddler clothes. When she's placed on the floor, Leah looks at her reflection in the mirror. With just the training pants, she looked like a toddler. With a visible diaper bulge, there's no way she could be mistaken for a teenager.
Tonya puts Leah in the seat of the cart and heads back to Tina. Tina smiles when she sees Tonya and Leah approach.
"So, uh, what's the plan?" Tonya asks.
"Well, clearly Leah will be wearing protection for the foreseeable future. Which means she needs constant supervision. I mean, there's no way she knows how to change a diaper!"
In fact, Leah'd had a vague idea of how to do so, but that now disappears from her head. She's truly stuck with needing someone else to change her.
"Okay..." Tonya says slowly. "You wanted me to be her babysitter, right?" Tina nods. "That'll work for the weekends and after school. But we still have high school for another week before summer break, and Leah and I don't have the same classes." Leah silently thanks whatever gods there might be that she's already taken all her finals. This last week of school is just filler for people to catch up on assignments and exams.
"That's a good point," Tina says. "Well, I'll clearly be taking Leah out of the last week of high school. Once summer break starts, Tonya, you're going to be her babysitter. I'll need you with her every day."
"I love spending time with my bestie, that's no problem," Tonya says. "I'll even cut my regular rate in half. But seriously, what is Leah going to do this week?"
"Oh, that's simple enough," Tina says with a smile.