Meantime, sweet sister, 2611 We will not part from hence.—Cesario, come, 2612 For so you shall be while you are a man.
"Viola has revealed that she is actually a woman, but she is still dressed in her male disguise, Cesario. Orsino acknowledges her true identity but says he will continue to call her Cesario until she changes back into women's clothing.
This scene resolves the play's confusion over identity and also shows Orsino's acceptance and affection for Viola, leading toward their marriage."