I know this is probably to late now but thought i might as well put it out there. Everyone knows how characters each have relationships with other characters. But what if a lot of your houses characters have a relationship with a lot of another houses characters. Maybe this could form more of a permanent/longer bond between character of the 2 houses that gets passed down through generations(yes this bond can be broken if something really bad happend between the 2 families). This isnt an in depth look at it but the core mechanic of it.