Did you ever try to teach a girlfriend to drive stick? Impossible right? Take her to a good gun store, or better yet, a good shooting class, have a professional teach her to shoot. Good chance she'll like it.
Is her objection a liberal thing, or something else, fear of guns?
We have 2 little kids. Let me tell you, there's so many more dangerous things in a house, or around town, that are more dangerous to kids. Stairs, medicine cabinets, driveways and streets, choking hazards. Unless you leave a loaded firearm on the floor, there's no danger to kids, not til they're old enough to load a gun themselves.