Angelina would be just like me giving you or someone else from the forum access to keys to my belt
Giving access to is something else then safekeeping. Giving your keys to someone else may have certain advantages too. It may result in more strict safekeeping of the key and more belt time for the wearer. That may increase safety. For example refusing the keys when horny or when there's a risk of interaction with others.
For @OctaviaSunwilds I think she likes it not having the keys and even the risk loosing them and being locked for good. That is hot she says. There is no backup as far as I know. The keys were stolen a while ago. She managed to pick the lock and has replaced it with one she can't pick. So now [keys lost] + [want out] = [problem] (but it feels HOT)