Vanessa Tell her you want to have a talk with her,and explain her what is a chastity belt and the purpose of it,then discuss it with her and be honest(telling her the good parts and the bad parts),then ask her if she would agree to wear one.Of course,she should be allowed to think about it for some time before answering it,if she doesn't want to give an answer right at the moment.And,if she refuses,you should accept her decision.
that's exactly what i think, but i think the first step should be that she suggests it herself. i would tell my daughter that this possibility exists, but not ask her if she wants to wear one, this impulse must come from her