Hi, I haven't reached this point yet, but I remember some people had this problem on the Xbox. I think tne NPC got killed and her corpse couldn't be found? Or was stuck inside walls? If someone is stuck, trying Fus Ro Dah usually works to blow them out. I'll be trying this quest soon so if the thread is still open, I will follow up. When I played on Xbox I was lucky and found her corpse lying at my feet when I fast travelled back to mushroom town.