“You are your family’s protector. What should you do?”
Um - dial “911” and wait 20 or 30 minutes for the police to come? (so they can draw chalk-lines around my dead body)
Grab my 12-gauge and light and head on down the hall....
I have to admit that is probably what I would do, because I am a hothead and don't want anyone to take our stuff. Most of the time they would probably run off if they weren't cornered after they heard you chambering a round.
But I have heard that uder most circumstances... the safer more reasonable thing to do would be to make sure that you and your family are safe in a defendable hidden place of cover then wait for the intruder(s) to come to you. Then blow them to pieces before they have a chance to come up with a plan to disarm and kill you and your family.