I think you should be able to do her quest and talk to her after that (In front of the town hall) in day 21, let me know If I'm mistaken
She disappears after I talk to her and doesn't tell me anything else. Is she supposed to go somewhere after talking to her Infront of the town hall?
Did you finish her quest in the east side distric?it is a requirement, if you haven't done it, she will not cooperate