Dear Abby: Should I tell my cousin that I know he was adopted?

Dear Abby: Should I tell my cousin that I know he was adopted?

DEAR ABBY: I am a 74-year-old woman who has no surviving immediate family. I have two cousins who are still living. One of them is my age and, to this day, may not know he was adopted as a baby. I discovered it when I was very young and snooped through my mother’s nightstand drawer. I mentioned it to my aunt (his adoptive mother) 30 years ago, and she made me promise not to ever tell him. Is it best to let him live his entire life not knowing, o…