The Taming of the Shrew 1.2 Performance: Hortensio, Lines 127-133

The transcript discusses a plan involving disguise and the role of a schoolmaster to gain access to Bianca. The aim is to instruct her in music while secretly making love to her without arousing suspicion.

How does the speaker plan to use the device mentioned to achieve his goal?

What does the phrase 'unsuspected Corto by herself' imply about the speaker's feelings or intentions?