My 2 cents worth: women like to feel safe with their men. And when men start carrying guns, or making sure people aren't following them, it presents an image of danger - even though we know we have a better chance of keeping them safe when we're observant about these things.
Hmm, does that make sense?
Case and point: I think she was a little scared, and covered for it by calling you paranoid and being irate.
Keep protecting your family, it sounds like you're doing a damn good job!