Circumvention of game mechanics (specifically, avoiding chance of capture by realm at war with your previous realm)
False oath
If there's an open estate there is no oath, not implicit, not explicit. One of the features of the new estate system.
By joining the realm Allison opens herself up to even more potential problems: Bans, fines, arrest, than if she just joined some realm not at war and passed through unharassed.
Call it what you will, to me, it makes things interesting. Allison has no love for the Moot, maybe she will use this war to get back at them like she couldn't in Kabrinskia.