Tina was buzzing from her actions, shocked she so willingly violated Leah's autonomy, yet feeling excited to do more. Is she really that terrible of a person? Can she even call herself a mother if she cares so little about what her child wants? It's horrid, but...she can't get rid of the idea of re-potty training Leah. It's an entirely selfish plan, but it gives Tina goosebumps. While she should be concerned about the implications of that, she puts them in the back of her head. Leah is already very accident prone for a teen, and Tina potty trains kids for a living. The best thing to do to re-potty train? Un-potty train, and then start again. That way, Leah would stop having accidents after being in diapers for a week or two (or three. Or a month? Maybe two?), and Tina can move on from this...weird 'thing' she has about getting her in diapers. It made sense. It was reasonable. Tina is an entirely normal, ordinary person.
"Leah, forget all of your potty training, pretty please." Tina said before she could stop herself. She immediately balked at her brazenness, in disbelief she actually just did that.
She nervously looks back to see Leah staring off into space, looking confused but focused. The loud hissing was impossible to misinterpret however. Leah showed no reaction to wetting herself, nor did she react as she leaned forward and scrunched her face. Tina felt like she was watching a train wreck as she heard Leah loudly mess herself, cacophonous farts and squelching so loud it practically echoed in the small car, and stench so strong and obvious Tina was tempted to just pull over right there to change her and get rid of the smell. Despite that...Leah didn't react, sitting back down with a audible splat. It was clear the the training pants she was wearing were no match for someone so unpotty trained, Leah's pants turning damp and a wet spot spreading across her seat. Leah shifted in discomfort, and wrinkled her nose at the smell, but showed no sign that she knew why or where the feelings came from.
It was a level of unpotty training that most toddlers never fell to, and Tina realized she might have royally fucked up her stepdaughter.