Can't you just use Alertness to detect the supernatural as well, though? If you can, then I'm already better with my own alertness (+4) than with Average Lore + the stunt (+3).
Also, thoughts on the custom stunt above? Fits better with the image of her, and being automatic, doesn't conflict with her personality like Sex Appeal did.
Edit: Oh wait my Alertness is +3. Even then it would tie out, though.