That's a much better researched article. But it's a myth that Miss Alice, frail, deaf and in her 90s until her death at age 103, was still able to be "protective" of Lee. It was Miss Alice's "protection" that allowed the attempt on the part of the agent to steal the Mockingbird copyright.
I think it is obvious that she is being better taken care of now than she was when Miss Alice was alive and frail and unable to continue to "protect" her.