She seems like she loves her kids a lot but she also seems really resentful of what motherhood has done to her life. Always the little comments about how she's doing it alone, how it's such a struggle, how some of her friends haven't made the effort to see Theodore, how she has to turn things down to put her kids first. I do empathise, but what did she expect?
I also struggle to have sympathy for her because she's in a privileged position where she could make her own life much easier. She wants to spend more time with her kids? I'm sure she could take a few months off from her clinic, dial back these TV appearances she does, stop the book promo, etc. The world won't stop spinning without her nutritional advice. Alternatively, if she really wants to push on with work, I'm pretty sure she'd be able to afford much more help in terms of nursery and childcare. Zachary must be nearly 3 now, his free hours will kick in soon.
I know it sucks that women have to choose, I think that's a different, much bigger debate. But she seems to be struggling to do both, so why not make life a bit easier for herself?