Leah did not have a nice night. It wasn't just the absolutely humiliating accident she suffered literally moments after saying 'she won't have frequent accidents,' or that Tina seemed so pissed she just decides to tell her sister that Leah isn't potty trained. That's bad, of course, but nowhere near as bad as the night she had. Whatever nasty thing she ate the previous day left her with never ending stomach pains, forcing her to be the potty pants Tina described her as. Leah will be the first to admit that she's been having a little trouble with controlling herself ever since that day in the store; maybe it was posing as a toddler for a day, maybe it was the trauma of Tonya seeing her as a poopy toddler, but ever since her already relatively frequent accidents became more and more common place.
She's ashamed to admit she never really stopped having accidents; her mother died when Leah was still potty training, and that trauma left a permanent mark that Leah doesn't think she'll ever get over. Combine that with her looking like a toddler, and she feels like she's constantly fighting a losing battle against the world's perception of her. Even though she's been having a rough time trying to keep her pants clean the past few weeks, having more close calls than she'd like to admit, all it took was one explosive accident to send it all tumbling down. The previous night was especially harrowing, as her stomach now always felt like she needed to go, completely jumbling up her control. Now she legitimately has no clue when it's a false alarm or not anymore, which forced her to ignore the constant feeling of needing to go. The only way she got any sleep last night was from needing to empty her stomach into her diaper every time the pain woke her up.
In other words...she was sleep deprived, and very VERY stinky. She wanted to change herself, but the sheer magnitude of her mess was something she couldn't handle without making an even worse mess. As such, Leah was forced to walk downstairs with the absolute nastiest waddle, chafing that she's horrified to realize is diaper rash, and a stench that makes her want to barf even after spending the night in it.
So Leah's morning was turning out just as bad as her night. She feels disgusted, humiliated, and had a rising sense of self hatred for how pathetic she is. Those are the thoughts that go through her head when she reaches the kitchen and sees Rita putting something in her breakfast. She's surprised that Rita doesn't know she's there by smell alone, but takes advantage of her lack of presence to back up and loudly walk in. She sees Rita wiping her hands, clearly trying to not look suspicious, and Leah keeps it that way.
"Morning Leah!"
"I need a change."
Leah doesn't even bother with pleasantries, nor pride; she just wants OUT of this diaper. Rita doesn't look offended, thankfully, and takes her off to get a lengthy change; Rita is clearly new to this, and it shows. At least for Leah's sake, it didn't end up a catastrophe with poop flying everywhere. Leah feels an immense sense of relief as all the excrement is removed from her body, and then feels dread return as another diaper is strapped on. She doesn't want to get used to this, but it's clear that Leah is nowhere near being able to wear panties again.
Rita wipes her forehead, looking a little taxed at the ordeal and Leah feels a touch guilty for subjecting the woman to her shit. Then she remembers Rita putting something in her food, and that guilt goes out the window.
"So, you hungry?" The woman asked. Leah noticed the pointed nature of the question, and nodded. When they sit down to eat, she is very aware of the woman eyeing her as she bites into the pancakes. Leah feels around the flapjack and can feel the hard shell of a pill, wrapping it under her tongue as she swallows. Rita looks satisfied, and they eat in peace. Leah excuses herself to the bathroom, which Rita has the gall to say she doesn't need to given what she's wearing. Leah glares and goes anyways, making it a point that she's not going to just take being diapered lightly; Rita luckily has the tact to not stop her.
In the bathroom, Leah has a chance to look at the pill. Why the ever living hell is Rita trying to drug her? Rita didn't seem malicious, and even the act looked harmless; there's no doubt that Tina probably put Rita up to it, probably saying it was some meds Leah needed to take but wouldn't eat for some inane (probably babyish) reason. So why would TINA want to drug her? It takes her a second, but she recognizes the pills---Tina mentioned them once off handedly, something about a laxative to help keep babies regular. Leah narrowed her eyes---suddenly her random bowel attack the previous day made a little more sense. What was Tina playing at? Did she actually want Leah to be diaper dependent? Leah's misery the previous night comes back to mind, and she feels her anger grow; there's no chance in hell she's taking this sitting down.
The pancakes from earlier rumble through Leah's stomach, prompting a noisy bit of flatulence; Leah didn't feel any different, but she presumed she must need to poop soon. Even if she didn't take the laxative now, whatever she took before was clearly still affecting her. What could Leah even do in this case?