Lady Stefanie was out to financially dominate this guy. She teased him as she showed off her cleavage and as she did naughty things to him, she realized that she was getting turned on as well and that is how she changed tact from just dominating him financially to both dominating him financially and fucking him. The guy thought that was how she did it but he did not know how lucky he was.
Lady Stefanie teased this guy and she showed him how naughty she was. He loved everything she did to him and he took the bait. The mistress did all this to fuck his wallet but he did not see it coming. He was under her control that he did not see how she financially dominated him. The loser only came to know about it way after they had parted ways.