Dreams involving violence, especially in intimate contexts, can be quite disturbing and are often reflective of underlying emotions or conflicts. In your coworker's case, the dream of her husband stabbing her during sex may symbolize feelings of vulnerability or a fear of betrayal in the relationship. The act of being stabbed could represent emotional pain, fear of intimacy, or concerns about trust.

The vividness of the dream and the realistic sensations suggest that it may have resonated with her on a deeper psychological level, possibly indicating unresolved feelings or anxieties related to her relationship or personal life. Blood in dreams often symbolizes loss, emotional turmoil, or a significant change.

It might be beneficial for her to explore her feelings about her relationship and any potential sources of stress or anxiety. Open communication with her husband about her emotions and concerns can also be a constructive way to address any underlying issues. Encouraging her to reflect on her feelings and experiences might help her gain clarity and peace of mind.