I don't think the rules even matter at this point. The person with the biggest stick, makes the rules. She demonstrated her intent quite clear when she flattened 3 blocks of the capital. No sane person is going to argue the details with a lunatic like that lol.If not her, then who? All the Baratheons are dead, all the male Lannisters are dead or can't become king because they're either part of the King's Guard or directly opposing the crown. I mean, I don't know how exactly the rules work in Westeros, but it seems like she's the only one left.