J.K.
Have you and your husband set up rules and consequences for the kids?
You two should determine together what rules are important to follow and what the consequenses are for not following them.
Then make a chart, rewarding your daughter for not breaking those rules. And both of you sit down & explain the rules together.
It should seem to your daughter that you are presenting a unified front. There are plenty of examples of behavior modification charts on line.
You're right, she is young. Nip this in the butt now!