Because she will not be annoy'd with suitors.

LUCENTIO.
Ah, Tranio, what a cruel father's he!
But art thou not advis'd he took some care
To get her cunning schoolmasters to instruct her?

TRANIO.
Ay, marry, am I, sir, and now 'tis plotted.

LUCENTIO.
I have it, Tranio.

TRANIO.
Master, for my hand,
Both our inventions meet and jump in one.

LUCENTIO.
Tell me thine first.

TRANIO.
You will be schoolmaster,
And undertake the teaching of the maid:
That's your device.

LUCENTIO.
It is: may it be done?

TRANIO.
Not possible; for who shall bear your part