Lady Cary wanted to make her slave enjoy himself but she also wanted money. So she capitalized on that to financially dominate him. The mistress gave him jerk off instructions and as he elatedly used them to cum, she managed to mind fuck him and had him turn to a pay slave without knowing. He had to pay for what she did to him and the instructions she gave him.
Lady Cary wanted to attend a music concert but it was damn expensive and she wanted the VIP experience. So she had to turn to findom to get the money she needed for it. So she made this guy her human atm and he paid for the tickets and for the money she was going to spend at the concert. She had a great time both getting the money and at the concert.