What is the main conflict in Really, Doesn't Crime Pay by Alice Walker?

A black woman in her 30s who lives in the South. Myrna is unemployed and married to Ruel Johnson. Myrna wants to be a writer but her husband does not allow her to write; still, she writes in secret for over 20 years, but hides her work. Myrna does not write full stories anymore, only outlines of her stories, because she is a coward and feels she has a heart of a slave.