Lady Liana does not like people who do not meet their end of the bargain. When she went to this dentist with a tooth problem, he told her he would easily sort it out but it turned out that he did not. Her issue was not sorted out and she was pissed. She did not want to keep losing money and so she used her shit to dominate him. She made him eat her shit so that he learned never to do that to his patients again.