A watched pot will never boil. Leave her to mull things over and step away from her drama. The less you react to her behavior right now, the better. Keep the focus on you and your sons. Oh, btw, there's a new supply of patience shovels being delivered to your area.
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.