Ok but if the account is in her husband's name, couldn't he give permission?
That's how it works with other personal property.
And if LE were savvy, then they would've asked her for permission to search the watch details in front of other family members and BM so she would've felt compelled to or else look like she wasn't helping...Or at the same time they asked for her phone because of course she willingly gave them permission on that because she left it at home. Sooooo, ergo... it would look fishy if she gave them permission for the phone but not the watch.