Nanny Returns, by Emma McLaughlin and Nicola Kraus.
...these parents see the aforementioned fifty thousand as an investment in the brand their children will be wearing for life, trotted out at every job interview and cocktail party; it will buy them entree into colleges, clubs, and gated communities. For the reputation of the school to suffer, it would be as if they walked out of Bergdorf's with their ten-thousand-dollar bags dangling off their elbows, only to find them being sold on the street for twenty bucks.
This was the sequel to The Nanny Diaries, which I have read - however, I remember the movie version more. The novel kind of hopped all over the place, but it did have a concrete plot: Nanny and her husband "Harvard Hottie" (aka Ryan) from the previous novel have come back to New York after traveling everywhere for his job, and they are looking to raise a family. However, Nanny's old charge Grayer X soon is back in her life, and once again she is trying to fix his extremely broken home life.
The novel was good but I think the first book was more organized (or what I remember of it).
2.5 stars out of 5.