Unless she asks your opinion, or asks you to deal with the problem, do NOT offer to do so. You are not her father; you are her husband. Treat her as your equal. If she complains about a situation, your job is to listen, let her know you are on HER side (even if you think she did not handle things correctly, or that it was her fault) and that you are always there to support her. More than likely, she wants to forget the incident, but she needs validation that she has a right to feel hurt or angry. Give it to her.