This hasn't been my favorite RaeAnne Thayne book by any means, although I don't hate it. But to be realistic, in the real world when a husband knows his wife suffers from severe depression, whether clinical or post partum, much less both, he's not going to hate her or be all that angry at her for taking off and leaving her family behind, because he would understand her depression had a lot to do with it. Even if Luke had no idea back then that Elizabeth actually thought of killing herself and taking her new baby boy with her, he would still not despise her as he seemed to when she first came back into his life.
The way the book was written, it took quite a while for readers to even KNOW that he knew all along that she was horribly depressed. I personally felt that should have been spelled out a lot earlier in the book so that readers wouldn't assume so far into the book that he had no idea his wife had problems with depression.
I think more studies should have been done about depression before this book was written.
As for her children, I still at this point (I'm nearly finished with the book) don't care much for Cassie. Her brother is great, but she's too snotty to her mother for such a long time into the story that she makes me grit my teeth.