Dear Prudence: My brother has hit two of his ex-girlfriends. He also threw one of them into a wall. Neither of them pressed charges or even called the cops, so there is no record of his violence. Before meeting his wife, he went to counseling and anger management as a condition of staying in my life and our parents' lives. He is a much different man, but sometimes I see glimmers of his old temper. He and his wife cannot have children and hope to adopt. As part of their adoption booklet, they've asked my parents and me to write letters about them. I do not feel like I can do that and don’t know what to tell them or my parents, who mostly want to forget that he hit women. I also feel like I'm in a weird ethical place where I don't know if I should tell the agency about his acts of domestic violence. I know if I was a birth mother it would influence whether I gave my baby to them. What should I do?