I've a little surprise for you ... you'll be allowed to accompany me tonight ... but as a slave, you're obviously not allowed to just spend the evening with me ... you need to be properly prepared for that! You like these sexy high heels, don't you? With these sexy shoes I'll trample you and your face until you're covered with heel marks! Because I want everyone, who sees us tonight, to know that you're just a slave and you've suffered under the heels of your mistress. Everyone will know that your face has been used as a doormat and laugh at you. But this price is acceptable for you, for the honor of spending an evening with your mistress, isn't it?! :-D