"Tina, whenever you tell me to do something, I do it," Leah grunted. "I must have been hypnotized or- or something."
"Really," Tina said flatly. "Are you sure you're not just covering for your accidents?"
"Yes!"
"In that case..." Tina crossed her arms. "Stop pooping." The log that was making its way into Leah's underwear froze in its tracks. "Poop your pants." The log resumed moving. Leah groaned.
"Tina!"
"I'm just verifying what you told me. Go pee-pee." Obediently, Leah's bladder emptied, but because she had so recently peed, not much came out. "Hmm."
"Do you believe me?" Leah begged between grunts.
"I think I do. No teen would do this of their own free will, but it's not quite an accident, since I can make you stop." Tina tapped her foot thoughtfully. "All right. Finish pooping and go to the family bathroom. I'll be right there with some clothes for you."
Tina left the aisle, Leah still helplessly squatting there, slowly emptying her bowels. Thankfully, no one entered the aisle while Leah finished up, and no one spotted her frantic scurry to the bathroom. A few minutes after she got there, there was a knock on the door.
"It's me, Leah," Tina's voice said. Leah opened the door. Tina had a full shopping bag in hand. She entered and closed and locked the door behind her. "All right. Let's get you in some protection."
"What?" Leah stared at Tina in horror. "But I lost my potty training because you told me to! If you tell me to get it back, I will!"
"Sweetheart, I don't think you were ever really potty trained," Tina said gently. "I've seen the skid marks in your underwear and the wet sheets when you wake up." Leah blushed furiously. "I think this is a blessing in disguise. We can start from the ground and work our way up. I'll keep you in diapers until you're actually ready to leave them."
"But..."
"No buts. You're going to let me give you diaper changes," Tina said firmly. Leah swallowed. She definitely was.
Tina undressed Leah, wiped her down, and then put a thick, fluffy diaper on her.
"There, that feels comfortable, doesn't it?" Tina asked. Leah scowled. It hadn't at first, but now it did. "I brought a few different options for clothing for you, since those pants are too ruined to wear home. They wouldn't fit over your diaper, anyways." Tina began to dig through the bag. "In the interest of hiding that you have a diaper, I grabbed some dresses. And some diaper covers to match them. Go ahead and pick."
Leah looked at the dresses as Tina pulled them out, ultimately deciding on the...