They were the best of friends, but the worst of enemies. My husband and his brother would become like tigers fighting for turf or for female companionship. And they would never stop. I liked it when we first met because, of course, my husband, then my roommate's friend, fought for the right to sit beside me at the dinner table, to talk to me, and would find all sorts of ways to stop his brother from any contact.

He didn't have to do that. I didn't like his brother much. They looked exactly alike, although there were 10 months between...