@Diana
so first of all i think it's a good idea that you want to wear a belt voluntarily 🙂
but in this case I have to advise you against it, because a safe with a time lock has the disadvantage that you can't get out of the belt in an emergency
you need a responsible keyholder and from what i read here it can't be your mother. at least not as long as she doesn't recognize you as a woman
I think @Saintprudence can help you best, I just wanted to write you my opinion about it 😉