I'm amazed she was able to get her kids, let alone herself, out of Dubai, how did she pull that off?!
My guess is she had this planned out for a very long time and put her trust in the right people in order for it to happen. When I worked in peds the social workers always had a long term plan for women trying to leave abusive relationships. Things like how to hide money, how to not arouse suspicion, getting a lawyer, etc. I'm pretty sure Haya was given similar advice.
Especially for rich women it's actually not easy to get to some money. Many of them are provided with everything by their husband, but they don't work (don't have to) and practically don't have any means on their own.
They're often curiously in a much more desperate situation than the average wife. Of course they know more important people, but their husband knows them too...
Glad that Haya was able to get away.