My neighbor is deathly ill..?

Sorry to say, but, your family comes first. Stand your ground. Do you know of any family members of hers that you could contact? You don't say how old she is, I'm just uming she is elderly.Maybe you might know of another neighbor who could take her. She sounds like she needs to be hospitalized. If you think she really needs immediate medical attention, contact social services and have them check on her. Good luck.