Are you good enough to be her slave?
Now that you look more like a pretty girl, and not just some disgusting mess, I might let you clean my shoes as part of your service. You'll have to show me first. Let's have a rehearsal. I don't want you near my shoes if you're just going to butcher the job. They're worth more than you.
Get a pair of your own shoes and put them on the floor. Now put your hands behind your back and lick them clean. Once the tops are done, prop them up against a wall and do the bottoms. Make sure to get out any dirt, gravel, stones, even dog shit that might have been in there.
Don't forget to look enthusiatic, or else I WILL go and find someone else. It will be a treat for you if I let you lick my shoes clean, and I want to see that it will be appreciated.
Make sure they're spotless before you continue. If this takes you less than 5 minutes, it's not done right.