toi. Except when used of deity tu, te and toi imply endearment or condescension, as, e.g., to servants, children, animals, etc. The change from toi to vous would therefore imply a coolness between the aunt and niece.
Va-t'en, Leave me, Let me be alone.
A la bonne heure, Well, expressing surprise and relief that the countess has dismissed her with a kiss.
ACT I. SCENE 12.
Page 24.