My kids made very clear to me that it was NOT in their best interests to do things "as a family."
Our family is now me + the kids. Stbx + kids have their own "family." (Well, that's debatable, but only because he's become an abject failure as a father, so caught up in his New Beginning is he.)
We are not a family any more. It messes with the kids' heads to pretend that we are.