Jeepmor,
Gotcha. It actually sounds like you're pretty well doing the right things, that she already accepts the basic idea, and that she'll probably come around as time goes on
especially if the practical difficulties can be overcome.
At this point she's probably just thinking things will be easier after the baby arrives. Unfortunately, they won't. They'll just be different!
Things don't get easier until ... hmmm. Scratch that. There will always be perfectly good reasons not to carry, so it's one of those things you've just got to jump in and
do if you're going to, without waiting for the perfect time. (It's kind of like having a baby, come to think of it!)
A lot of married women, and especially new moms, feel downright guilty about spending family resources on themselves. I'm thinking specifically about purchasing holsters & ammunition, finding range time (leaving the kid with a sitter is a biggie), taking classes, and so on. Here's the lever you will probably need at some point: it's for the child, and it's for
you. She's less likely to feel guilty about going out to practice, or about buying gear, or about taking a class, if you gently make it plain to her that you consider these purchases important investments for the whole family, and that even if she enjoys them, they are actually responsibilities and not personal indulgences. Feeling less guilt means she'll be slightly more likely to do what she needs to do.
Finally, if you can find a group of likeminded women for her to hang out with, or even just one other woman, you'll be amazed at what a difference that can make over time. She may be hanging up on some "silly little thing" that she's just not going to tell you about, but which she will confide to some sympathetic near-stranger under the right circumstances. Or she might just have an unacknowledged need to see other women successfully managing to carry (humans are social animals, after all).
So, lotsa pitfalls between here & there, but overall it sure sounds like she's headed the right direction. From what you've written, my best guess is that you don't need to overtly push philosophy anymore, but instead focus more on dealing with the practical and social issues in a matter of fact way.
Congrats on the impending arrival. It will be the end of life as you know it.
pax