Viewing Other Factions Family Tree

I'm wondering if it is possible to view other factions family trees and relationship statuses. If it is possible, please let me know how to do it. If not, maybe this feature should be included in some update wishlist. It would add incredible degrees of intricacy to diplomatic plans. I wish I could view my princesses family trees after they're married off to another faction heir. This would help me prevent proposing incest and avoid lesser degrees of inbreeding among the aristocracy.

It isn't possible at the moment. I thought about this too would be very useful. Maybe keep it limited to allies though. However I have doubts as to wether we'll be seeing this.