Goddess Harley was out to dominate this guy and she felt that the best way was not to do it physically so that he felt physical pain. She wanted to do it financially so that she could burn a hole in his pocket. So she made him her human atm and she withdrew it until she felt that she had hit her target. Being a hot one, it was easy for her to accomplish her mission.
Goddess Harley was flat broke and she remembered that she had a findom slave who she could dominate financially to make some money for herself and especially to pay for her tuition. She did not waste time in doing so and she did it while doing her assignments. It was fun as she multitasked and managed to kill two birds with a single stone. She was super proud of herself.