Princess Amber sees your only, meaningful use immediately in your face. As an obedient slave, you will now lick her shoes clean. That's an order! So get down and start licking. Her shoes should be free from dirt when you are finished with them. Up and down with your tongue, swallow the dirt and do a decent job! But you seem to struggle by yourself, don't you? So Princess Amber takes off her shoe and spits on her sole. With her saliva the dirt is guaranteed to come off her shoes much more easily. Lick them completely clean, NOW!