The way I've done it with close family is that I kept a copy of their master password in my own vault (or the shared family one) to remind them when they inevit

The way I've done it with close family is that I kept a copy of their master password in my own vault (or the shared family one) to remind them when they inevitably forgot. It's not ideal, but it's better than the alternative of them reusing extremely easy to guess passwords.