she said "Aaron really wants to start a family."
She was supposed to say, "WE
really want to start a family." Sounds like she's just giving into what her man wants. Which is typical with many women. They'd rather lose everything they've worked for to please their men. While the men sacrifice either nothing or very little.
My suggestion to you is, if you want to keep your best friend, don't bring up anything about her lost career and her reasons for having a baby. She's made her decision whether it was the wrong one for her, only she knows that and time will tell. Just support her with anything she needs and keep away from the subject. Most will defend their careless decisions and husband's before admitting they mucked up.
I've learned this first hand and I've never bothered putting my 2 cents in again with anyone.
Just hope for her sake, in the end of things, she's happy.
As far as your friendship, there's still hope it may survive the baby. As long as she's able to talk about more than just the baby. There probably will be some distance between you both at first but if you are persistent in supporting her, I don't see why you both can't carry out a healthy, long lasting friendship.