My child is bullying another, but she just came to live with me and may still feel unsettled. What do I do?

I’m divorced, and a couple months ago my daughter came to stay with me in New Jersey. (Up until now she lived with my wife in Georgia during the school year.) Recently, I heard from another parent that she was bullying their kid. I want to talk to her about this, but she just got settled and I don’t want her to think I don’t trust her. What do I do?

— Bully parent