Political restrictions, I guess. Both royal families must not want dual bloodline holders because they want to monopolize their own bloodline magic so they disinherit them and restrict them from having children... Though it's a different story for Zenjirou. If they can no longer prevent their...
@Overdose, well I'm not that knowledgeable about Anthrax but the fact is her symptoms were showing at her feet. I'd have thought Mccoy would have at least prescribed her to make sure no infection could go to it... Meh I guess if she's fully recovered then it's fine...