"Can you keep a secret?" by Caroline Overington

This is the fourth novel by Caroline Overington that I have read, and I read it as part of the Aussie Author Challenge. While this book was an easy read, it really did not engage me in the way that the other three books did, and I was a bit disappointed as I had scored "Sisters of Mercy" 9/10, "Ghost child" 8/10 and "I came to say goodbye" 7/10 when I read them.
I really found it hard to empathise or be really interested in either of the two main characters - Caitlin (a pretty but uneducated Australian who had an unconventional upbringing and left home at 16) and Colby (a rich American who works on Wall St). The unlikely pair meet when Colby and some other rich friends organise a Whitsundays yachting holiday to celebrate the end of 1999 while their offices are shut for the Y2K bug, and Caitlin, who had been working as a 'skimpy' waitress in a local bar, accepts a casual job as deckhand for the trip. The story starts off as a bit of an uninspiring teenage one-night-stand becomes romance scenario, then Caitlin moves to New York, leaving her mother with MS behind in a nursing home. The love story starts wearing thin then collides with the 9/11 terrorist attacks in New York, leaving Caitlin too scared to fly home and seeing therapists and Colby, despite being obviously bored with Caitlin even after 6 weeks together, marries her. For me, neither of the characters come across as likeable or really believable, more like stereotypes. Next great idea they have is to adopt a child from an orphanage in Russia, which predictably does not go to plan. As the book goes on Caitlin appears to be more delusional and very selfish in everything she is doing and things get less and less believable, while Colby distances himself as much as possible from her by working longer hours. I wont go on to describe the storyline in any more detail as it will give away the 'twist' at the end, but I did find this book quite shallow and disappointing compared to the other books I've read by this author. It hasn't put me off wanting to read her other books, but I do hope the rest are more like 'Sisters of Mercy' and less like 'Can you keep a secret?'.  

Started reading on my kindle: 30th December 2014
Finished: 31st December 2014
My score: 6/10
Aussie Author Challenge stats: female author, first published in 2014, genre: drama