Please visit any aadhar agency viz Banks (might have outsourced to some Adhar agency), request such an agency to fulfil this special need of the Lady who is an elderly person and since she can not move and see if they can do anything. They will be able to find a solution, the reason being the bank agencies frequently carryout adhaar camps in gated communities where I live. when they can visit and do here ... they should be able to do coming home considering the ladies situation.
PS: She has voter ID so she can use the same for both identity and address proof as well.
Alternatively the head of the family (under whose care she is!!!) can enroll her for aadhar!