[Note: A lengthy IM conversation between Rania and GRRM. Edited for brevity.]
Tigers14: guess you are not going to tell me about Minisa Whent :)
GeoRR: Does it matter?
Tigers14: minisa? it might, since if she is the sister of of the last lord of harrenhal, than edmure's kid (if he lives long enough to have one) might be the real heir to harrenhal which would give the freys effective control over riverrun, the twins and harrenhal.... and be for all intents and purposes the rulers of the riverlands.
GeoRR: Yes, but the crown has awarded Harrenhal to Littlefinger.
Tigers14: true. but littlefinger doesn't have the men to conquer it does he?
Tigers14: btw, i think that with tywin dead and tyrion on the run, the crown under cersei is going to have trouble
GeoRR: Cersei will have some challenges, certainly
Tigers14: btw, can a marriage be annulled without both parties present? and without sansa revealing who she really is?
GeoRR: no one needs to be present to annul a marriage
Tigers14: how?
GeoRR: but Sansa would need to request it
Tigers14: as sansa?
GeoRR: Well, why would a High Septon consider a request from anyone but the parties involved?
Tigers14: i mean she can't hide who she is. she has to request that her marriage, her being sansa stark, to tyrion lannister be annulled.
Tigers14: which would imply that the High Septon would need to know that Sansa Stark is requesting the annulment of her marriage.
Tigers14: Which would reveal, to a certain extent where Sansa is.
GeoRR: yes indeed
Tigers14: another question, can NW vows be annulled if a person had no idea who he really was when he took them?
GeoRR: who had no idea who he was?
Tigers14: jon
GeoRR: Jon knows who he is. He may not know who his mother is, but that's not the same thing. There are plenty of orphans and bastards in the Watch who don't know who their parents are.
Tigers14: yes. but if jon is the legitimate son of rhaegar and lyanna , he is the king of westeros.
GeoRR: well, you know I am not going to get into any of that
GeoRR: I think I've said enough for tonight.