Lady Krasaviza felt that she had to teach this slave a lesson. She felt that since he was not responding well to her instructions, she had to take it a step further and hurt his pocket. So she financially dominated him using her findom humiliation prowess. He did not see it coming but he felt the effects when she was done with him. Needless to say, he changed after that.
Lady Krasaviza's rent was due but she did not have the money to pay it. She did not want to borrow the money so she went ahead and she used her gift of findom to get the money for rent and other extras. The mistress teased this guy and after she had managed to control him through her naughty ways, she got him to not only pay her rent, but also to give her enough money other extras.
Lady Krasaviza had studied her boss and she knew what ticked him. And since he had a thing for her, she used that to financially dominate him. He could not tell what she was up to as she was using both flirting, info she knew about him and serious discussions to get her way. He ended up doing what she asked him and she laughed all the way to the bank.