It’s one of the earliest memories of my horrifying my kids.      Earliest.      Not the last.      I am, after all,      A mother.      A conversation about fire safety started this particular episode.      We started with something like, “How would you get out of the house in an emergency?”      Once I was satisfied with their proposed plans, I shifted to the philosophical. “What is the one thing you would want to save?” I asked. The girls made me go first.      Which was easy, because