I went to the Alduin's Wall after completing the main quest and Delphine and Esbern were there. Anyway, Delphine starts attacking me and all Esbern says is, "Delphine has been concerned about you." Would a concerned person really attack you? That's just not cool Delphine. I'm apart of the nightingale's and the dark brotherhood...this may have something to do with it I guess.. But if anyone knows a way around this or why she's doing this lemme know.