What is Bianca's response to Lucentio and Hortensio's argument of who will tutor her first?

Bianca essentially tells them that their argument is of no account.... she will decide the times and subjects of her lessons for herself.

Why, gentlemen, you do me double wrong To strive for that which resteth in my choice. I am no breeching scholar in the schools. I’ll not be tied to hours nor 'pointed times But learn my lessons as I please myself. And, to cut off all strife, here sit we down.