Depends on the people. I have a Muslim friend who lives with her parents still. Her parents own a large house and have set up apartments in it. My friends sister and husband live with them as well, and they have two children. They moved in after the birth of their first child and will move out when their children are a bit older.
It's still the commun thing in most muslim countries famlies is important think
For Hussein i am just surprised to see CP still living with his parents especially after his marriage , must admit i don't know how opulent the palaces in Jordan are ..my understanding is not a Windsor or Zarzuela...
Again i just assume that at some point the prince who will be King will need to have his own place and office..
Al-Maquar is a HUGE compound, over 40 Hectares and it's made of several palaces. It's bigger than both Windsor and La Zarzuela. This wiki gives a quick history of the different palaces on the complex.
https://en.wikipedia.org/...tuated%20at%20Al%2DMaquar.
Perhaps Hussein will leave and get their own palace at some point, I don't think they live WITH his parents. Even when William stayed with him when he visited Jordan, it was said that William was at Hussein's not at Rania and Abdullah's.