WOW how very sorry I am that this has happened to you! It's not bizarre though, but an normal actions for some people... perhaps greedy ones? To me, they see you as the reason she is still alive, and if so greedy, then to get rid of you will allow them to finally... get whatever?

Certainly don't take any abuse.. any MORE abuse! Call the police. If you are able, also contact the lawyer for the lady who is ill, for which reason you were hired. ( Or, whomever is her legal guardian, if one has been selected. ) She needs her advocate to settle this problem.