I have mixed feelings about this book. At the end of Part One the author convinced me of her authority, but I'm not sure if I am sold. Yet the writing is good, and I'm wondering where she's going with the characters, so I'm going to stick around a bit, because I am very much intrigued by characters who are in the latter parts of their lives.
Update: I finished it, but I feel very little for this book. Maybe if someone could help me understand any possible subtext, my opinion would change, but the characters seemed unchanging, boring, disengaged, and flat. Even the younger one, Sara, spends her days merely dodging actual relevance or meaningful engagement with the other characters. The most active character was the setting, with its ocean and weather. The only reason I finished this book was that the writer is very capable, and I was curious to see if anything of note happened by the end. The answer, regrettably, is no. No signs of life in any of them, still.