I have taken Lady Isolla's quest, I've conquered Swadia, the Rebel's faction became just «Kingdom of Swadia», all lords are Isolla's vassals now, but I still have the quest. Shortly after I've captured the last castle, she said «NO STRING!» to me and left the party. She also made me a marshall soon after. I tried to speak with her, but there are no any suitable lines in the dialogue. What should I do now? Is it bugged? If so, how do I fix it?