@hobisflower I agree that its mean but it makes sense in the context of the story and the family. The family has a lot of enemies so they would need to be able to protect themselves against poisons. Also, CIel didn't die when she drank the very lethal poison for the grand duke, so her ability to withstand poison will be a theme in the book
@2Incredible : That poison is only lethal to people with high magic power i.e. the duke.
She didn't (or at least she think she didn't) have much, if any, that's why she's confident she would survive.
She's also aware of the possible side effects, but she thought the chance of it happening was low enough to not care.