@alberto
Hello.
It I think you have to talk with your daughter and your wife, and agree what is the goal of the chastity belt. In general, forced belting is a bad idea, and a form of abuse. So, talk openly about the point.
I did not wear it in school either, since do it had a lot of real problems, in case of emergency, exposure, and really, in school (or sports it is not necessary since we are quite busy).
About the goal of the belt: you should agree since very first if you only want avoid pregnancy or you wish more protection. And it is important do not lie, I mean: here , in the forum, there are cases in which at first the intended target was avoid intercourse, and later when the belt arrives and they see that it is possible wear it with normality, and fulfill more aspects, (avoid oral sex, masturbation etc...) , more accessories are bought.
You need agree what is the target (pregnancy, then an abstinence belt is enough, avoid orgasms you will need a secondary shield, or avoid stimulation, then she will need wear bands). Think it carefully, and do not lie (none of you) from beginning.
About secondary shield, yes it is more natural go toilet without it, but do not wear it, exposes us to smash our lips when we seat.
Fancy Steel is a good belt, but, I have one, to provide us safety, it has to fit very tight, and secondary shield is not removable either. In this belt, I recommend wear it with bands if she wants to be protected of stimulation.