My daughter came home from an active shooter drill in third grade and asked me a question I answered badly.

She's nine. The drill was in October. The school sent a letter beforehand — they always do, and I always skim it, because by now it's as routine as the fire drill notice.

She was quiet in the car. My daughter is not quiet in the car. Then at dinner, with her brother right there, she said: "If a man comes in my school, is Mrs. Keller going to lock the door with me outside?"

Because that's the actual drill. The teacher locks the door and does not reopen it. They tell the kids that part. They have to.

And I said: "That's not going to happen, baby."

That was the answer. That was the whole answer I gave my child.

I have replayed it probably three hundred times. There were so many better things available. I could have said that Mrs. Keller would do everything she could. I could have asked her what she was scared of instead of deciding for her. I could have said "that's a scary thing to practice" and let her talk.

Instead I gave her a promise that is factually not in my power to keep, and I gave it fast, because I wanted the conversation to be over. Not for her sake. For mine.

My wife caught it. Later, in the kitchen, she said: "You told her it wouldn't happen." Not angry. Just naming it.

Here's what I've figured out since, and it's the part I actually want to say.

I have built my whole parenting on being the one who tells them the truth. I told them when my father was dying. I told my son the real reason we moved. I'm proud of that; it's the thing I thought I had.

And on the one subject where my kid asked me a direct question about her own body in a room she sits in five days a week, I lied in four words, because the true answer requires me to say out loud that I send my daughter somewhere I cannot protect her, and I am not able to say that sentence and then drop her off the next morning.

So the lie wasn't for her. It was a lie I needed.

She hasn't brought it up again. She's fine — she's a happy kid, she loves school, there's no damage I can point to. That's almost worse, because it means I got away with it.

They do the drill again in the spring.

I want to hear from parents who got asked this and answered well. What did you actually say? Not the principle — the words. And has anyone said the true thing to a nine-year-old and had it go okay? I need to know what that sounds like before April.