Outstanding questions from the last one:
Has anyone come across any other references to a magical marriage? GRRM mentions the term in an SSM about marriage.
This is from the SSM, the whole thing is a bit longer and the link is up above:
Kevan and Tywin know who Maggy is, how come Cercei doesn't know her connection to Jeyne?
Also, IIRC Varys mentions to Tyrion (?) about how he keeps secrets such as a King's Hand's secret whoring.Did he mean Tywin?