Book analaysis

I need to work in a controlled assessment for the ''Of Mice and Men'' book. The task is 

How do we create sympathy and portrayal for Curley's wife. Not over 500 words. I want to get all the marks as possible to achieve Band 5 which states:

Sophisticated interpretation of texts, sophisticated engagement with writer's ideas and attitudes using precisely selected supporting textual detail and sophisticated analysis of aspects of language and structure