20 People Who Have Found A Dead Body Tell What Happened And What Their Reaction Was
In my experience as a caretaker, people usually wait until they are alone to die. They'll wait for you to leave to use the bathroom or take a phone call, something like that. Your grandma probably did the same, with the assurance that you would find her quickly when you came over.
Didn't find them as such, but was called to attend a cardiac arrest. The person was long gone, but myself and the ambulance crew had to go through the motions for quite some time before a doctor arrived via HEMS to call death. What made it worse was that the persons spouse was standing in the door watching us, and their young son was sat at the top of the stairs. There is really nothing you can do but your best. The strangest part was just driving away when my job was done.