You can but it has to be something that everyone is okay with.
For me I view all my relationships (even my ones with my metamours) as equal and non-hierachal. I know that's not necessarily the case for everyone else in the family but it's how I work.
Woodsmith: My husband
Merry: Tig's wife/slave
NT: Merry's boyfriend/owner
Elle: NT and Merry girlfriend
Umbra: Elle's Dom
Pet: Umbra's slave/wife, Elle girlfriend
Domo: Pet's submissive