Mistresses Elena and Mia did not like how proud this girl was. She had to be dealt with and that is why the mistresses chose to use their boots. They did not want to inflict pain on her yet so they asked her to lick their boots and in fact they made her do it. Their socks were next and when she was done they spat into her mouth and she had to swallow their saliva. She learned her lesson and humbled herself.