But is she really your responsibility?
Not your thoughts. Mine, again. Though I suppose she is. You saved that man's life, and while mortals recognize no laws of obligation, now that you have helped Black Tarn, the Garou may insist that she's your responsibility henceforth. What an excellent way to discourage helping each other. She has not closed the spirit door all the way, which means you might be able to find her. But leading her back to safety?
It would require great patience to encourage her back out of the brambles of her madness and then pull her again into this world.