This is a little confusing. The Apple ID password should be stored in Settings (iPhone) and iCloud (System Preferences, Mac). The devices can then use the password to sync info. Is this the issue — that info is not syncing? If not, what applications are asking for her password?
At the ridge of being a nag, the laptop should be password-protected, but with a password which is different from the Apple ID password. 1Password is a terrific app to help with this.
I’m just here for the Lou Reed reference.