how do you watch someone die?? (like a grandparent or parent)

my grandma is dying, and it's happened kinda suddenly (less than two weeks). tomorrow morning she will be moved out of the hospital and back into her nursing-home room. something called final-care - I guess to wait until the end comes!

so how do people do that - watch a loved one fade away right in front of them, not knowing how long it will be?????