First things first, this book is not a new adult book. Greg is 35 and Melissa is 29, so they have been adult way too long to be considered as "new".
I didn't like Greg much in book 1, and still didn't like him much in this book. I guess, I liked him a little bit more after finishing this. He was sweeter and hotter, but still a tad annoying.
The plot was better than book 1, but still too predictable and unrealistic. Some dialogues were just downright weird when a three-year-old spoke like a teen.