Script, fog, alien abduction, spew, affairs, talking about D to co-workers/friends are all just defense mechanisms to protect their feelings. To a WAS the pain of staying is greater then the pain of leaving. It's how she is coping. Doesn't make it right or healthy but it's how she is handling it.
Validating her feelings helps. "I understand how you could feel that way." You aren't agreeing but empathising with her. This is how you connect with people.
Understand what she is doing but it is out of your control. If it is really bothering you then bring it up with no expectations. This concept calms your fears ("snakes on a brain") and lets you move forward towards a solution.
M22,H45,W45 S21/18D12 Retain faith that you will prevail in the end, regardless of the difficulties and at the same time confront the most brutal facts of your current reality, whatever they might be.