Lies, deceptions, unlikely friendships and survival

The story is about two roommates Lauren and Megan. Lauren is a senator’s daughter and Megan is a small-town girl from a middle class family.
It is told alternately from Lauren’s and Megan’s perspective and goes back and forth in time.

The book is well written and the story-line is compelling, but to tell the truth I was underwhelmed. From the beginning there are so many hints about what has happened 14 years ago that when we reach the actual revelation, it falls flat. I was expecting the author to pull a big twist out of her hat in the end, but nothing happens.
There are too many details about the daily routines of the characters that one longs to skip pages.