Before they leave the store with their things (which includes a package of diapers in Leah's size that Tina snuck in), Tina stops the cart.
"Leah, do you need to go potty?" she asks. "We're going to hit some rush hour traffic, so it'll be longer than usual to get home." Leah crosses her arms, upset at being treated like a baby.
"I'm good," she says firmly. And she's not lying this time. She doesn't feel any need to use the bathroom. And that's despite the juice that Tina bought her while they were shopping.
"Are you sure?"
"Yes!"
"It might be a good idea to have you try to use the potty, just in case."
"I said I'm fine," Leah growls. Tina sighs. She resumes pushing the cart out of the store.
"All right, but if I have to change a dirty diaper, it's on you."
Leah, because she looks like a baby right now, is buckled into the car seat Tina keeps in case of emergencies at her daycare. While she sits there, her arms still crossed, she feels warmth spread through her diaper. It feels really good. Wait, did she just pee?
No, there's no way. She didn't feel the need to go, after all. Leah must just be imagining it.
Tina gets in the car and drives off. Like she predicted, they hit a traffic jam. Tina's head goes up when Leah lets out a smelly fart.
"Leah, if you need to potty, I can pull over right now. There's a gas station."
"No, I'm good."
"I really think it would be a good idea to at least try," Tina says. Leah shakes her head. Tina sighs and turns her gaze back to the road.
Leah is playing on her phone, bored out of her mind, when she lets out another smelly fart. Ugh, she needs to eat less beans. She hears a small rumble from her belly. She must be hungry. Then, she feels something enter the back of her diaper.
Leah sits up in horror. She's- she's pooping! And she had no idea she needed to go! She didn't even realize she was pooping until she felt it in her diaper! Frantically, Leah tries to clench, to stop the log from fully exiting. But she can't.
And then, she doesn't want to. Leah feels the poop filling her diaper, pressing against her bare butt cheeks. It feels so good. She should do this more. Leah begins to actively push, now grunting, enjoying the sensation of her diaper slowly filling up with feces.
Tina looks in the rearview mirror and sighs. She knew this would happen, that was why she tried to get Leah to use the potty. But teenagers were too stubborn. It was a good thing she got more diapers. Clearly, Leah is going to need them.
Leah finishes pooping. As she settles back in her mess, she feels...