[If Rincewind has to be drunk, the least L'Arachel can do is see that he doesn't get to enjoy it. She has to instruct him about the evils of such things somehow.

Fortunately, his muttering is indeed out of earshot, and she only hears the first part of his commentary. He's spared more lecturing for the time being.]

Witches? What are they?

[She takes the teapot from him with thanks, and carefully pours the steaming water into it.] There. I never know how many tea bags to use for a pot, but let's start with two, and we can always add more if we wish! Do you take your tea with anything? Sugar? Milk?