That all depends on your own limitations and what you chose accept and live with.
In my case, the answer was simple, it's never too late. I understand the problems that led to the breakdown of our M. I understand and accept my faults. (x)W understands and accepts her faults. (x)W understands, accepts, is regretful and remorseful for her actions after the M broke down.
Even though our entire lives have been torn apart, turned inside out and leveled to to the extreme, we are leaving those problems behind us.
For you at this point, I think your best course of action is to go about your life, do not worry about your W and M. Your W thinks she knows what she wants and it's not your M, and what is a marriage after all? The bond of two people, not one trying to persuade the other to be married.
Me 35/XW 33 S13 & S12 M: 10/17/98 OM & S: 07/08 D final 06/09/09 12/03/09 - 06/13/10 "Piercing" 06/13/10: Engaged to Re-marry 10/17/10 06/25/10: Expecting baby #3 2/14/11