She was the one who influenced Macbeth to kill the king for power so bascially she was happy about it
Okay so...
Morbid means to be appealed to death,
Retrospection means a look into the past.
We can infer she avoids Morbid Retrospection due to a rough past that could have caused PTSD (Post Traumatic Stress Disorder). Someone could have died in her past that was close to her.
I would probably say remembering or understanding. The best one is probably understanding.
He meets his class mates racist mother