@Kiwi_McLean
I read the first chapter of your book, :)
I hope you don't mind me saying this but I think it's a bit...fast paced. Her husband cheats on her with her best friend, I'd be crushed (just my own opinion, I know not everyone would act the way I would) if I had to find that out. Maybe do some editing on that chapter, like flashbacks of the fight and when she found out he was cheating.
The flashbacks can be when she's meeting the new guy or when she's boarding the plane.
She could go into a whole monologue explaining why she was there.