Angelina but it can always happen that she says no. And if that's the case, then that's okay too. if you want her to wear a belt too, then you can't lose anything compared to the situation now (no belt), right?
I know,Angelina, but it's in everyone's best interest for her to wear the belt, so it's not about not losing but it's a situation where you have to try to win.
As I told you proposing that she use the belt is a one shot gun, if she doesn't accept it is not a proposition that can be made more times until she accepts, that insistence would only lead to her getting more entrenched.
The girls are the most impatient, but they have understood the situation, the smartest thing to do is to use the same strategy that my sister-in-law's family used to get their youngest daughter to accept her belt.
I know that girls can do that very well, and when she is in the mood to accept the belt, the rules could be discussed a bit since, living away from home, it could be a little different.