Apple has 2 ID systems, which can be the same; one for you "Apple ID" and one for "I Cloud". She , presumably, has a back up of music etc in iTunes on a PC as well? Start on that by logging in to her Apple ID using the original e mail and password, create an iCloud account (if you want using the same ID and password), then on the iPad and iPhone ensure the same ID's and passwords are used. Read here:
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