I appriciate any Duke/Duchess who does something other than trying to sit on the income forever and ever (then again I think there should be a fame point for every hostile seccession), but I have to say I can not see this happening. Way too fast a movement without apparently even securing the change to monarchy first, and when the monarch is asking the Queen of Carelia to speak on his behalf to Strombran and Suville to join in alliance, well..
