The baby grins in a way that feels more like a smug smirk than anything else. Then, he leans forward and grunts. His face turns red. He's pooping, again? Leah knows babies poop a lot, but this seems ridiculous.
But again, she's overcome with a desire to do exactly what the baby is doing. She can remember the feel of the poop sliding out her asshole and smearing across her cheeks. And she wants that again!
Leah copies the baby. She leans forward and pushes with all her might. The two are both grunting in their carts, and now, draw the attention of the woman pushing the baby's cart.
"Looks like you've got a mushtush, too," the woman says to Tina. Tina looks over at her, confused, then at Leah. She gasps. But Leah can feel some movement happening now. She had fully emptied her bowels earlier, but now, somehow, found a reserve of poop. Leah closes her eyes, enjoying the sensation as a log slowly snakes its way into her underwear. It eventually pinches off and Leah sits down in her mess again.
The happiness she felt at messing herself disappears the second she sees the look on Tina's face. Leah gulps. But the other woman comes to her rescue.
"Wait, Tina?" the woman says. Tina looks over. "It's me, Carlie from high school."
"Oh my gosh, Carlie, so good to see you!" Tina says. She smiles at the baby. "Who's this little guy?"
"Greggy. My only one so far. What about your cute girl?"
"My stepdaughter Leah." Tina frowns at Leah. "Unfortunately, I was not prepared for an accident like this from her."
"Oh, you forgot the diaper bag? Don't worry, I've got plenty of diapers! It looks like she and Greggy are the same size." Carlie digs through her diaper bag and pulls out a diaper and some baby wipes. "Go ahead and get little Leah cleaned up. Then we can keep catching up."
"Sounds great." Tina pushes the cart towards the restrooms.
"Please continue to act like I'm a baby, I don't want her to know my real age," Leah blurts out once they're a safe distance away. Tina laughs quietly.
"I was going to put you in a diaper regardless, don't worry."
"...What?"
"I work with babies and toddlers, remember? They're sort of the main point of a daycare. I know all the different pooping faces. And the one you were making is the happy pooping face. You, young lady, were enjoying messing yourself!"
Leah wants to argue, but she can't. Even if she was influenced somehow by baby Greggy, that doesn't explain why she liked the feeling of pooping herself. So she stays quiet.
She continues to stay quiet as she's cleaned and put into a diaper, and left wearing only that diaper, as her poopy "accidents" ruined her clothes. With Leah sufficiently protected against future messes, Tina takes her back to the aisle Carlie and Greggy were in.
Thankfully, Greggy is busy nursing from his mom when they get there, and not bothering to make eye contact with Leah. Not yet, at least. Leah's worried that, given how excited Carlie and Tina are to see each other, she might be exposed to more of Greggy's strangely compelling stare.