Fine, but I assume she doesn't have the background and medical knowledge that your doctors have to give an educated opinion, if - G-d forbid - you dropped dead suddenly, on what the cause(s) of death were. It may or may not be related to something she knows.
A wife does not need to have medical training. The doctor will explain to her as the lay person she is. He had a bad heart. And his death is indicative of same. I know some want to see a conspiracy, but there is none. If there were, the family would have said something. They obviously know much we do not know, nor do we have the right to know it. They have accepted whatever the doctor has told them. They obviously have reason to and I believe they of course knew he had been diagnosed with a heart problem in the months preceding his death.