I'm going to be very, very frank w/you. There is no way for any of us to tell you that she's going to take the time to really think about what her final decision is going to be. She could easily go either way, but I'm leaning more towards her going for a divorce at this time. Now, my opinion could very well change as she progresses through her crisis, but for now...I say let her go.
If she raises the "divorce" issue again I think what Cadet advised you to say is excellent. You can't stop her from divorcing you, but you darn sure can be a supportive and great father to your children.
BEClem, there's always hope, but w/MLC, you have to prepare for the worse and hope for the best. Go back, think about the man you once were and that's the man you need find again. Dig deep for more patience because you are very early in the crisis and it's going to take a very long time for her to work thru it, if ever.
As for her comments about you not being there, well, they do like to rehash old stuff that bugged them at one time. It's time to put that record away and let's focus on the here and now. Actions, and I do mean, actions, speak louder than words.
It's time to take care of YOU and what you need to do to find your balance and be there for your children.
There's always hope and we can only hope that her heart and soul will soften and think about things...but you need to continue moving forward as if she may never return to you right now.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.