In the TV series Big Little Lies, we are repeatedly told that Nathan left Madeline and Abigail 15 years ago. We also see a lot of friction and conflict between the two families.
So how is it that Madeline and Nathan are both living with their (new) families in Monterey? Was this a deliberate arrangement or some sort of a coincidence? (I'm not sure if this was explained in the TV series and I missed it. Or perhaps it is only explained in the book which I haven't read.)