Sir Toby put your weapon down NOW! Everyone out except you (points to Sebastian).
Please help me get out of this prison
I am Sir Topas. You must remain here because you are indeed a madman.
Will you marry me?
Sure. Why not?
Toby, Andrew and the Fool all think Sebastian is Cesario. Toby begins to fight him when Olivia walks in.
Malvolio is locked in a prison cell when the Fool comes in disguised as a priest named Sir Topas. As Sir Topas, the fool tells Malvolio is an insane madman.
Thinking Sebastian is Cesario, Olivia asks him to marry her. He accepts.