Jane is a strong woman, and one of the pieces of evidence for this is her reaction to Mr. Rochester. She does not back down. She holds her own in conversations, not at all typical for a Victorian woman. Consider when Rochester asks her to marry him, even though he is married.
“Do you doubt me, Jane?”
“You have no faith in me?”
“Not a whit.” (ch 23, p. 184)
Although this is funny, it is also a good example of her strength and strength of character. She is not willing to be a mistress, but she is also able to speak her mind. She does not let his status, her status, or the fact that he is a man to intimidate her.