The SadoSisters already tortured their slave a lot today and basically he's too exhausted to talk back to them by now. They demand that he licks their dirty high heels clean they wore in a night club last time. The shoe soles are extremely dirty and licking them is totally disgusting, but the slave has no choice but to do what his mistresses demand. They even start trampling him again while he worships their shoes and he's in extreme pain. In the end he has to lick their bare feet clean too, of course!