She chokes on something, covers her mouth to keep it all inside.

"Of course. None of this is your fault. What a masculine way of thinking. What a Thornton way of thinking." She tries to swallow down the acid. "I tried to give you a chance. For her. Because she's my sister and we all belong together. But you don't intend to try anything, really. It was lovely talking to you."

When she's turned her back to him, she finally managed to swallow down the bile rising up.