The nurse knows Juliet better than anyone because she has raised her from a baby; so, she decides to play with Juliet a bit by withholding valuable information from her. It is up to the director to decide how "angry" the nurse gets when Juliet pressures her for information, though, so the game can move from playful to offensive/defensive when the nurse finally tells Juliet to send another messenger next time. Eventually, the nurse comes clean with the information that Juliet is to go to "confession" and there be married to Romeo. Whether the nurse avoids giving the message clearly out of playfulness or if she wants to delay admitting the fact that her little girl is growing up, there's no clear way to tell unless the director dictates more. But what should have been a simple message given to the receiver certainly becomes more intense as the nurse avoids giving it out straight in the first place.
thanks that makes much more sense......... :)