Lady Despina was interested in making money from this guy and that is why she went out of her way to torture and humiliate him. She did not make the humiliation obvious as she wanted to make him a findom slave going forward instead of a one time thing. And it worked out well as she teased and turned him on like never before. She let him jerk off to get a release.
Lady Despina was not doing well financially and she remembered that she had an asset she had never exploited before. She has a sexy body and naughtiness that were valuable but remained unexploited. So she brushed them a little and then went out there and she charmed men with it and turned them into her financial slaves. And that is how she changed her fortunes and laughed all the way to the bank.