Sidney asks Juliet if he can visit over the coming weekend. He says he'll take her pages back to London with him. Sidney wants to have a supper party too so he can meet Eben, Isola, Dawsey, and Amelia. Juliet is thrilled and explains that Isola will host Sidney. On Friday, Isola slips a note under Juliet's door. She's happy to host Sidney and asks if Juliet would like her to slip an elixir into his coffee.
Isola's offer to slip an elixir to Sidney indicates that she believes Sidney and Juliet are actually in love, just as Mark does. This suggests that true friendships between single men and woman are somewhat rare and unusual, given that many can't accept that they're just friends.