Ok so i finished the Dawnguard quest, and found out a few weeks ago that i can get back to her and tell her that harkon is dead, so she can return to tamriel.

well now im kinda stuck, i told her hes dead and all but she never returned to the castle, i waited and nothing happened, she is still in the SC.

I joined the Dawnguard this time, can this be a problem?