The mother and father aren't related by blood, marriage, or adoption.
I understand the mother and father are not related by blood. Not many mother's and father's are. But, how can they deny their own ordinance. The parents are related to the children and visa versa by blood. Period. Who are the children supposed to live with if not their blood parents?
This idiocy won't stand a court challenge.
"The mother and father aren't related by blood, marriage, or adoption."
Your interpretation means that everyone not married or adopted must then be blood relatives to everyone else living in the home. So that means a mother or father by marriage living in the home is not permitted. Likewise a child from a previous marriage is also not allowed to live there. A live-in nanny or caretaker is also not allowed. Some ordinances are just stupid and fail to match reality.