Question about Security Quest for Thieve's Guild

[Madison CN]

I found the Altmer who is the security expert at the Hlaalu Council Manor. But whenever I mention Southwall she says

"Secure Southwall? What are you talking about Breton?"

I have my faction with her up to 100. I even tried joining their guild. Nothing seems to work. Any ideas?

[Wraithus Dire]

SPOILER_ISH
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...She aint the one - keep looking. The security expert is the only one (to my knowledge) of the 5 ppl in the city that isn't affliated with any other guild...hint hint hint.

Good luck