I don't think anybody said the fear is the fantasy. When somebody is afraid or angry or even in love with somebody (like have a crush on another person), they can have elaborate fantasies or dreams. This is not mental illness by itself. There is a continuum. If I confuse fantasy with reality and act on it, then it can be mental illness.

When I read the first post, I thought she was just real mad and felt like her husband was trying to push her over the edge, not literally kill her. I thought maybe she was misunderstood and felt ignored or possibility that her husband indeed hostile to her. So I thought maybe this was a passing fear and anger and paranoia in response to having a terrible day. When I read more posts, however, I felt there was more to this, and I became more concerned, both for her and her family.