- Edited
You'd just need to ask to wear your belt again as @Saintprudence says. Then do a mutual key exchange, or put both keys into the locker. You could even set up a pass code that each of you only knows half of!!
Anyway, I think you see yourself as an external party applying your mother's own beliefs to her. But you also seem increasingly to share and agree with these beliefs! If you do end up thinking chastity is important, then the rules should apply to you too.
Thanks for answering all my questions. Sorry to be so nosy. Am fascinated by the switch-around that's taken place here.