How to react in an emergency situation

I think it's safe to say I'm the best mom ever. The other day I came in from the garage to refill my wine when the doorbell rang. My son raced to the front door to answer it. As I refilled my glass, I heard a man's voice and peaked out from the kitchen to see who it was. Slowly...very slowly....I moved back out of view and became very still and quiet, as to blend in and go unnoticed.

After a moment or two, my husband arrived at the front door to tell the man that he needed to be talking to him and not his child, and then ran him off. Then he came in looking for me.

Husband: Did you hear the doorbell ring?

Me: Yes.

Husband: Well did you know it was the Jehovah's Witnesses?

Me: Yes.

Husband: Why didn't you save your son?

Me: It's my birthday so I hid.