Even if she were the second daughter, she had not told any lie... She was brought up as the first daughter so that is what she AND everyone else believes.
Well, she does not have any friends. She does not have any life. Her life is spent writing letters to her fiance who never visited her, and staring out of a window. We saw her speak with some people but they did not know about her circumstances.
He is goddamn awful. Even if you marry a "slut", someone you somehow think is defiled, he should not treat her like dead weight that is not allowed to exist at all. Give her space. Not buying his bullshit at all. He is an awful person.
She asks to remove his hand while last chapter she sat on him for a long time - more like you bothered him more than he did (did not get the vibe that she was intimidating him, it was just odd). Also, I get that bad people were after her so it kept her occupied but her new friend who helped her...