I think how you refer to W's family is personal and depends on your relationship between you and them. D doesn't have to remove them ad tour family if you don't want it to. If you want to continue to call them family and they want to do the same, that's between you and them. W has nothing to do with it.
In my case I'm closer to almost all of W's family now than she is, except the sister recently removed from banishment. That won't be changing unless they decide they no longer want me in their lives or me theirs.
Good luck on the job
Accept what is, let go of what was, and have faith in what will be
