it's part of a scene (DialogueGenericScene04). unfortunately, it is a very poorly conditioned "catch-all". it will fill the scene's alias under one condition: femalesultry voice type.
i don't know if there are specific conditions in the scene itself, but it seems to play the scene even if not all aliases are present in the same cell (i have this scene playing repeatedly inside my house, even though the "nordmale" alias is not even filled, or at least it is not filled in the cell). and it keeps doing it over and over again. hahhaha its so annoying
i'm almost tempted to make a esp just to disable that entire scene