I am very glad you contacted your DB Coach. He/she sees some of what we see in your wife at the moment.
At least you've made a decision, i.e., whether to stay or move out. That was weighing on your mind for a while. You will know, if and when the time comes whether to stay or go. You will know when you've had enough.
For now, keep the focus on you and your children. You've given this woman a lot of head space w/o paying rent. She has a lot of growing up to do and she needs time and space to do so...no pressure!
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.