Did you ask her why she was worried this was going to be the biggest mistake in her life? Hard to chalk up these things as misunderstandings in my book. Each person must live with their own decisions and choices.
How different has this time been for you than in times past? Is this round any different to you than others as far as how it's gone, what you're feeling and what you want?
Good luck.
Me 42, Wife 39; Married 16; Together 17; Kids: D13, S10 Wife asks for Divorce: 03/19/13 Reconcile: 07/07/13 Round 2 Starts: 02/19/17 Apartment Life: 04/21/17 PA Confirmed: 05/23/17