Two phones and 1 iCloud Account
My wife and I both have the same Apple ID on our phones. I have an iCloud account on my iPhone. When I take photos with my phone, they also come up in my wife's phone. So she got a different Apple ID. Now my photos no longer show up on her phone. My wife would like to use my iCloud account to upload her photos to iCloud. We were told that up to 3 members of the family could use the same iCloud account. How can we do this, i.e., my wife's uploading her photos to my iCloud account despite having a different Apple ID? Thanks.
iPhone 8 Plus, iOS 13