Given a real-life anecdote of a complex ethical situation, identify who is wrong here. Classify each post into the following categories : AUTHOR (if the author of the post is wrong in the situation), OTHER (if any of the others mentioned in the paragraph is wrong), EVERYBODY (if everyone mentioned is wrong) and NOBODY (if no one is wrong in the situation).

My son's father and I have been divorced for 6 years. Our son (13) has been having some issues with mental health, and my ex and I are generally very good about communicating how our son is doing mentally when he's in the other's custody. Additionally, our son is being bullied pretty badly, and my ex and I talk a lot about that as well.

My son recently revealed to me that he is gay. I have not told his father because I don't want to betray my son's trust, even though my ex and I have a policy about being totally open regarding our son. AITA for not telling him?
NOBODY