"You are joking, Lizzy. This cannot be! – engaged to Mr. Darcy! – No, no, you shall not deceive me. I know it to be impossible."
"This is a wretched beginning indeed! My sole dependence was on you; and I am sure nobody else will believe me, if you do not. Yet, indeed, I am in earnest. I speak nothing but the truth. He still loves me, and we are engaged."

– Jane Austen

Pride and Prejudice, Chapter 59. When Elizabeth opens her heart to Jane and tells her of her engagement to Darcy, her sister is flabbergasted. She thinks that Elizabeth who hates Darcy must be deceiving her. But Elizabeth assures her that Darcy still loves her and the engagement is real.