Allow non-parents to be creators, and not listed as parent or partner.
Allow non-parents to be creators, and not listed as parent or partner. In addition, to incorporate a previous idea, this new "creator" could label themselves eg Grandparent, Aunt/Uncle, Sister/Brother.
I like creating this kind of album/memory and my brother and sister may be less inclined, and I'm happy to be the gatekeeper of the content I've created. Therefore, the parents do not need to be the only type of family member who is listed as creator.