The story of what happened in Rodolphus" house that horrible night came rushing out of her at a dizzying speed. For whatever reason, despite feeling like she had less respect for Kingsley than she had in the past, it was important to her that he understand she didn't swallow the potion willingly. She didn't want to appear weak or incapable of keeping her promises. The wizard simply listened to her tell the whole story of Rodolphus freezing her and pouring the potion in her mouth. When she was finished, she felt both relieved and nervous about what he would say in response.