Let's put it this way, when Queen Alia died, it was to Princess Muna that King Husein turned for comfort. It seems Queen Noor felt a bit threatened by the presence of the other wives and one only has to look at Abdullah's wedding to see that Muna was pushed to the side quite a lot. I think Hussein always had a great respect for Muna and she was the mother of his first born son - to an Arab man, that is a big thing. They always seemed to have a cordial relationship.
There is footage of Princess Muna leaving hospital with baby Abdullah and the king and Hussein is so concerned with his wife getting into the car OK, little gestures that show how proud he was of her and that he loved her. He was more concerned with his wife than showing off the baby and then, heir to the throne.
They did have a happy marriage but perhaps maybe distance set in, but then Alia came on the scene and the rest is history. After the King married Alia, many Jordanians did not approve and lots of shopkeepers kept pictures of the king and Muna together for a long time after he had married Alia. So there has always been respect and support for Muna and I thinkit is strange for an English lady how she acted like the most traditional 'Arab' wife out of all Hussein's wives.
Kudos to Princess Muna for always keeping her dignity, being a great mother and grandmother and for all the years of work she has done in Jordan which often was overshadowed by others. Muna was too much of a lady to make a fuss and is naturally modest and I think Hussein appreciated that very much.