Nicole and Sarah come home after a long walk where their new slave girl christina meets them. The girls walked in the morning, they were tired and their boots were dusty after the street. They sit on the sofa and christina faithfully crawls after them .. “We need to test you, stupid bitch .. If you do your job well, then maybe we wont throw you in the trash” – Nicole said to the slave girl. “I will do my best, Mistress. My tongue is at your service” – answered christina with her head bowed. The slave girl does not clean the girls dusty boots with her tongue, carefully licking every crumb. “You are a pathetic nonentity! I disgust to even look at you, fu!” Sarah said. But christina did not give up and tried to work her tongue with all her might. The slaves tongue turned black with dust and Nicole ordered it to be cleaned to begin cleaning their sweaty socks. The slave girl began to sniff and lick the girls sweaty socks while they mocked and morally humiliated her. “Next time, Ill collect all the dirt from the street and bring it to you! Got it, bitch?” – The girls continue to humiliate christina .. “Yes, I understand you. Thank you, Mistresses” – christina obediently answers and swallows sweat from the girls socks. Then she takes off Nicole and Sarahs socks with her teeth and they push them into her mouth. But the girls feet are just as sweaty after the long walk and christina will have to clean them too. Nicole wipes her sweaty bare soles on the tongue of a slave girl while Sarah looks at her in disgust .. “How can you be such a nasty slut?” christina begins to worship Sarahs feet in an attempt to please her.. She wants to show that four dirty boots and four sweaty feet are not a hindrance for her at all. But at the same time, the girls are amused by how christina is humiliated and perhaps they will keep her for their further service.