Private
That's something we already know. The seeds are the most helpful part. You have to grind them and make a tea from them. You can do it by steeping the leaves but it is less effective.
You may speak to her, but I would like to be present for the conversation, or privy to the correspondence, whichever you choose. That isn't out of distrust, it is because from what I see in her Callaine is likely to say yes to anything an adult tells her to do right now, out of fear and regardless of her own feelings. I shan't interrupt unless she seems overwhelmed.
Dan is a very good man and it is my hope that he will be able to help her.