Board Thread:Skyrim/@comment-128.204.243.8-20131213150326/@comment-13518348-20131213152045

There was one case where she was in Whiterun instead of Riften (see bugs on her wiki page), so try checking Whiterun.

I would look in Riften again too, just in case you happened to miss her. She should be at the docks or the fishery during the day and at the bunkhouse in the evening.