I also want to add that the more family and friends try to talk to her about what she's doing, the more determined she will be to continue on the path that she is traveling. MLCers take on new friends, i.e., people that they would not have associated w/prior to the crisis. Spouse, children, family and even pets are put up on a shelf and they do not tend to visit or socialize w/during the crisis, sometimes a little bit of socialization, but not much. When she begins returning to earth, she will reconnect in the opposite way, you, the spouse being the last to reconnect with.
She is the mirror image (opposite) of the person she was. No matter what anyone says, she has to travel the path she is on in order to come out the other side and hopefully a more mature, settled woman.
Keep the focus on you and your children. Let go, Let God take care of her.
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.