Well, I don't think it is because of his wife, and the comparison with P. W-A has nothing to do. P.Hashem is 1) a Jordanian, 2) an Arab, and 3) a Muslim so wearing traditional clothes is not abnormal for him. He's being doing so for a while now.
It has been the subject of much debate. It seems that the picture was photoshopped... again... and one of her legs disappeared in the process. A lot of people are having a blast on this year's Xmas card because of that.