Let me start off with the sections I highlighted in the book:
"How long could a single night really be expected to last? How far could you stretch such a small collection of minutes?"
"But their relationship had existed wholly in the moment. And he was starting to realize that moment had passed. This, it seemed, was just what happened when you left someone. They disappeared behind you like the wake of a boat."
This book didn't work for me. Why? Because I didn't feel the chemistry between the characters. None. Your talking about a book that has two people living apart on the opposite ends of the globe, longing (this may be too strong of a word, I'm using it anyways!) for one another. You have to make the reader feel the "want". You have to make us relive the time they spent together in our head. So we too, are wanting them back together. I didn't get that.
Looking back at the other book I read by this author, This is What Happy Looks Like, I had the same problem. No chemistry.
I'm not even going to go into the parent situation. Just no.