Maybe she is just figuring out now that the kids don't come first...she does. If you are not good to yourself you can't be good to others.
It's really hard to redefine your place when it was defined for you for so long. Not necessarily by you, but by expectations and society and what we expect of ourselves as well.
Trust me, the kids are so important, they really are to her, but I think she is struggling to balance and some things get tossed around in the fray until everything is calm again.