Yes, nlt, you are huge threat to her! It's really comical how she has your ex, lives in exotic locales, far, far away, and still feels threatened.
don't worry, this won't last and in fact, it seems as though it has hit the rocks already. "happy" people do not write emails like this. and wealthy people do not nit-pick over petty expenses.
i do wonder about your ex though. why on earth did he do this and would you be willing to take him back after all this?