Whether she is a WAW or someone in MLC, we would follow the same advice here. Yes, her behavior is very typical and that's why we say "focus on you". If you continue to focus on her, it will drive you nuts.
Have you read Sandi's Rules? Here's the link to her thread:
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.
