The sentence that best explains what troubles the main character in The Awakening is
"Mrs. Pontellier, though she had married a Creole, was not thoroughly at home in the society of Creoles; never before had she been thrown so intimately among them."
This sentence suggests that the main character, Mrs. Pontellier, feels a sense of discomfort and alienation within the Creole society she has married into. She is not fully assimilated or comfortable with the social norms and expectations of the Creole community, which troubles her