I just wanted to chime in here. I checked the Paxton Quigley book out from the library a while back to "get my wife into the idea of carrying." It sat on her nightstand untouched for 3 weeks. So, I picked it up and read it - it's a good read, it's something we all should read. So, after finishing the book, I really wanted my wife to carry (to protect herself and my son while out and about), but pushing it didn't work. So, I jumped online and found the CorneredCat web page along with the others mentioned here and recommended them to my wife - even went into the other room to load them up on her laptop so she could peruse them - still no progress. So, I was reading along and found that it's best not to push - although it was all I wanted to do.
I would recommend following the advice listed here. Do you own thing, answer her questions and let her know why you carry and that you will support her with any decision she makes.
My wife and I had a long conversation and she has mulled over the idea. She doesn't feel the need to carry, but has resolved that if someone comes into our home and threatens any member of the family, she would use the gun without hesitation.
Be a supportive and loving husband - that will win you more "brownie points" than gun talk ever will.