"My mother in law is said to be of the anointed, unfortunately she is also known to have mental problems."...........
The only anointed ones that I knew weren't quite "right" mentally...at least in my estimation. They were a bit "off" and didn't fit in well with the normal rank & file JWs let alone the rest of society. They were both old school dubs that were around during Rutherford's era. They went off on tangents and no one really understood them. Instead of being in awe of being in the presence of an anointed one, we humored them and avoided them when possible.
Outlaw made a joke about having to have mental problems to think you're anointed...but there is some truth to that statement. What are the identifying marks of a member of the anointed? They've been "chosen" and they know it the same as we know we are alive and breathing. We...the rest of us...have trouble understanding how they know.
Knowing that this religion is all BS, how could anyone really "know" they're of the anointed if the possibility of that calling isn't real? One has to imagine it and imagine it to the point that they believe it and are willing to pretend to everyone else that they are special.
No offense to your mom 007, but knowing how the Society indoctrinates people to think certain ways to begin with, if she is having some issues, it may well show up here, in her belief system.
Of course, that's no reason for the elders to doubt her because they can't prove that she's not anointed anymore than she can prove she is. It's an impasse. They'll have to take her word for it.