"Harry and Ron and I spent most of our final year away from Hogwarts, but I did take my final examinations after the end of the war.  Between that and the wedding and trying to rebuild our world, things have been... hectic.  I’m afraid this is the first chance I’ve had to come looking for you both."  She’d managed to find out with Kingsley and Professor McGonagall’s help where her parents were now living but with everything such a complete rush, she’d not had time to approach Severus about coming here until now. 