Spoiled and dominant. That's Princess Serena! No matter if it's gifts or money, the princess is used to getting everything she wants and if she doesn't get it immediately, she uses unfair means against you to get it. Just like now! She knows that you can't resist her perfect ass and that's exactly why she's showing it you in short jeans pants now. Princess Serena knows what power her ass has on your compliance and thus makes you completely will-less. You now function according to her rules and Princess Serena gets what she wants. She gets some money out of you, but is that enough for her?