I got a really serious Bug problem on the "Eugene takes a lover" quest. After speech to Thomas in the Charles View Theatre he walked to the door that SHOULD where Emogene, but she isn't here. Also, there appear a mark that goes on a locked room in the Cabot house. I really need a help because I can't continue the quest,I know that is a bug and Bethesda should fix it.

how often do you save? Try reloading iv had to do that twice. Fixes it every time

I haven't any saves before