For the purposes of this Act, relationships (including the relationship of being family or being relatives) are taken to include (without limitation):
(a) relationships between de facto partners; and
(b) relationships of child and parent that arise:
(i) if someone is an exnuptial or adoptive child of a person; or
(ii) because of the definitions of child and parent in section 3; and
(c) relationships traced through relationships referred to in paragraphs (a) and (b).