She's able to relax some once she can see he doesn't have a hand on a gun or knife. She doesn't carry a gun herself; to do that, she'd have to keep one in the house, and that's risky with a child around even if it's locked and unloaded.
"Maybe there are some others, then." From what Dad said, though, there are very few people around any more who own those, and the chance of this man being one of the particular ones he's mentioned... "On someone in town."