CB, Your w's mlc journey is not about anything you have done in the past. It's about what happened to her as a child. She's gone back to that time to try to figure out what stunted her emotionally. You could have laid golden eggs in the past and she still would have found things that made her unhappy.
Please don't beat yourself up. Life has a way to taking over and no one can be superman/woman all of the time. You had a good marriage and that's what counts.
Again, mlc is not about what you did or didn't do. She would have had a mlc whether she was single or married to someone else.
Yes, Lucy does have the ball and now you have to wait patiently for her to play "tag".
Hang in there.
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.