Unless Mother is incompetent and the POA agreement is durable in face of that, it matters not whether it's in her best interest or not or whether she can safely drive or not. As a competent person, the POA can not act contrary to her instructions. If the POA is not durable, it's risky even in the event that the person is incompetent. In the latter case, it may be required to attempt a guardianship or some similar instrument.

