Our use-case is this - wife wants to use Homepods to make calls from her phone, but wants husband, in case of medical emergency, to be able to make calls via HIS phone when wife is not home. From what I can tell, making calls from the homepod requires a connection to one phone, and if THAT phone is not in the house, phone calls cannot be made at all, even if another member of the house, with phone, is home and on the wifi. Is that correct, or am I missing something? Thanks!