Malvolio is the steward in Olivia's household and therefore Maria's supervisor
Quotes
By my troth, Sir Toby, you must come in earlier a' nights: Your cousin, my lady, takes great exceptions to your ill hours.
Maria explaining to Sir Toby that her lady is not fond of her uncle's behaviour (Act 1, Scene 3).
Nay, either tell me where thou hast been, or I will not open my lips so wide as a bristle may enter, in way of thy excuse. My lady will hang thee for thy absence.
Maria scolding Feste for being absent from the household (Act 1, Scene 5).
I can write very like my lady your niece: on a forgotten matter we can hardly make distinction of our hands.
Maria conspiring with Sir Toby to write a letter that would fool Malvolio (Act 2, Scene 3).
Go shake your ears!
Maria insulting Malvolio
Get him to say his prayers, good Sir Toby, get him to pray.
