Too old post! But Ladyda, I got another clue about KSN's age, probably its right.
I got known that Zayed bin Sultan bin Khalifa was born in nov/oct 1988. His wife seems same aged to him according to their childhood pic with Khalifa bin Zayed.
[ instagram ]
I found another photo of Shamsa bint Sultan with Hamdan and Khalifa. It seems to me that Khalifa is atleast 3/4 years younger than Shamsa.
[ instagram ]
So, KSN was born in 1991, if its too early, then its 1992. November is his birth month.
I couldn't find any birthday post for Shamsa, if I would get then it would be pretty clear! She is either from 1988 or 1989.