Madison hears what you said, and her sobbing immediately stops.
"W-what does that mean??"
"Your 'continence' is your ability to control your pee and poop. I'm going to give it back to you."
She lights up, and leaps to her feet, though somewhat awkwardly thanks to the mess pressing against her.
"YES! Thank you thank you!!" She hugs you.
"Buuut, your family still thinks you have to wear diapers. So while you can use the toilet as much as you want, and your family will be proud of you every time for doing that, they're still going to make you wear those things, and I'm still going to be your caretaker."
She pauses for a moment, but considers her losses and gains.
"...sure. Sure sure sure okay whatever!" She says, her 'general' approval of you kicking in once more.
"Now, let's get you changed." You say, taking her hand, grabbing a diaper, and heading out the door.
"Uh... why are we leaving my room?" She hesitates a little.
"Your family is okay with all of this, remember? It won't be an issue to them." You resume dragging her out.
"But..." she protests weakly as you lead her down the stairs.
You place Madison on the living room floor, only a few feet away from the TV--the TV being watched by the rest of the family on the couch.
"Hey Alex," you call to the mother as you kneel down in front of her daughter, "could you get me some paper towels soaked with warm water?"
Alex complies--the show not being worth enough to pause for--and hands you what you need by the time you've gotten Madison's diaper opened up. The process is a horrifying ordeal for her. Every time she tries to cover herself up, you push her back. She wants to beg you to do this somewhere else, but she doesn't want to push you any further, considering how lucky she already feels having gotten off the hook regarding her 'continence'.
Back in her room, in a clean diaper, she asks you if changing her is something that you'll have to do often, considering she won't actually be filling them up.
"Wellll," you answer, "you'll need them changed at least once a day anyway, on account of sweat and stuff. But also, your family may just not give you the opportunity to use the restroom, considering they don't think it's possible."
"Oh... so I WILL have to pee myself again?" She frets, placing her hand against the front of her diaper.
"Well, if you sneak your way to the bathroom and use the toilet, your family would logically be proud of what they see as an accomplishment. However, no matter how many times you do this, they will always think of you as completely incontinent. Therefore, if you were to get up and say 'I have to go to the bathroom', they might laugh, or get confused. This means you won't be able to use the bathroom as a reason to dismiss yourself from something. So if you can't come up with something else, you may be stuck and have to do your business in your diaper."
"Ewwhh..." She pouts. "Well wait, what about at school? No one thinks I'm incontinent there, so I could just take the diaper off at the beginning of the day, put it in my backpack, and put it back on right before I leave!"
"Oh haha, good plan. But I'm not into that plan. I'll have to follow you to school and make everyone else believe you're incontinent as well."
"H-HUH?!?! Are you kidding??" She tries to not hit you. She manages to not shed more tears. She paces around the room for a while, before looking back at you again.
"Look man," she says, "I like you, because you made me like you, but why don't you do COOL things that I WANT for a change?"
"Hmmm..." you scratch your chin.