Yeah, sorry for that.If memory serves try to use a lockpick while in her room.'
Its not well explained, it took me a bit as well.
Thats a shortcoming of the quest system with no detailed hints. It annoyed me so much that I rewrote the entire quest system with nice "Quest Assigned" pop ups and detailed hint screen. Will be in V0.7+. Small V0.7DEV example screen attached.