You are grasping at straws. She was dead. When your brain is stopped you are dead. You don't see or hear with your brain.
The only ones grasping at straw, is you.
The brain control the functions of almost everything, including motor functions, memory, sensory perception plus consciousness.
Clinical dead, only say your heart stop beating and stop breathing. But it doesn’t mean your brain are dead too, not until the brain cells or neurons are dead too.
In the case that cells in the brain are alive, then the cells are merely inactive, even if the heart not beating.
Of course, cells cannot remain alive and inactive indefinitely. Too long, then the brain cells will begin dying. The heart does need to start again to deliver oxygen to those cells, because the inactive cells cannot remain living.
As long as inactive living neurons can become active again, when the heart start pumping, then it is possible for person to live out his or her days, a normal life.
Of course, because some cells may have died, some people can suffered from some degrees of “brain damage”.
For instances, there can be some losses of memory due to brain damage, or loss of the ability to some body functions, etc. in more severe case of brain damage, the person can become a vegetable, where the patient still have motor functions to the heart and lungs, but cannot regained consciousness.
A person who was only clinically dead for short time, may suffer no brain damage at all. All this depends on the numbers cells that are living and dead.
But all this indicate the person surviving and living after being clinically dead, a physical phenomena with logical and medical explanations, not a spiritual one; it is not evidence for soul, spirit, or the afterlife, as you have claimed.