So, in my current Sogdian Dynasty game (currently on the second generation, reigning as emperor of Tartaria) none of my siblings (who hold duke and king-tier titles) seem to be taking any cocubines to shore up the bloodline. The effects of this are already showing, with at least one of them having already died with no surviving children, as all their kids died as children due to bad traits. My direct family is doing alright, because of my cocubines, and the spare daughters / sistersI've matri-married to random dudes have had their husbands take concubines, but for some reason, my extended family just refuses to make good decisions. What gives? Is there some way I can make my brothers / cousins take concubines without switching characters (I don't play in ironman)?