Well if Kabrinskia decides to TO regions and Terran TO's back and starts winning by a lot they could do the whole, "Get rid of Allison as ruler or we destroy the realm" thing for it to happen.
For that to start, someone has to pull the trigger. I don't know that that will happen. Sure, Allison is a loose cannon, but she's also very adept at gauging just how far she can go before truly Bad Things happen to her. If she ever messed up it was only once, when she seceded Aegir, but even then she managed to claw herself out of the abyss by setting off the war between Astrum and Caerwyn.
