I think one can pretty safely say no, even without being a lawyer.
I assume that your mother has lost capacity and is unlikely to regain
it. If so, I'd suggest that you get everyone who was notified on the
registration and is still of sound mind, including yourself, to sign a
document recommending your wife. That may carry some weight when the
receiver is appointed.
If your mother is still able to express views, getting a professional
with expertise in her problem to try to elicit that opinion, may also
carry some weight.