Well I found out what the problem was. She knew that I wanted her to go back to work when the baby was old enough for daycare or a babysitter. She says she can't stand the thought of leaving the baby with someone else and doesn't want to go back to work. She was afraid to tell me that because she thought it would make me mad. I have no idea why she thought that... we have never been in a serious arguement and I've never tried to make her do anything she didn't want to.
But, I did finally get the answer out of her. When she started the explanation she was crying because she thought I wouldn't like the answer. I told her that I was fine with whatever she wanted to do, I just wanted to know how she felt about it. So that's solved for now. Luckily, right before the baby was born I took a new job that gave me a big enough raise to replace her income.
I'm glad I posted this here. I've been trying to get her to open up to me face to face for 2 years, but now I'm thinking instead of trying to change that about her I'll try harder to adjust to the way that she does feel comfortable communicating with me.
Thanks for everybody's input.
I'm happy you two managed to work it out Shaun. I've had similar issues before, with things being held back because "I would get mad." When I never remember ever getting angry about an opinion. I don't pretend that I'll ever understand it, and think it is something that just needs to be lived with. I wasn't too worried, since you expressed that this was pretty much the only area where you were having this problem. When communications break down in a localized area like that, it is usually fairly easy to break through.