no one knows when they will die.
This line of reasoning is something relatively new for me that I'm hearing more and more of...it's a way to explain the following seeming paradox of the 1st century Christians being told that the end was very near, and 2000 years later, we being told the same thing that the end is very near. In other words, it's very near in the sense that when you die, it is the end for you regardless of when the actual end is. Simply put, if I die before Armageddon and then am resurrected into the "new system," from my point of view, I wake up and I'm there. The big A could happen in 3014, but for me, it will happen the day I die, and the next thing I know, I'll be awake in "paradise." So with that in mind, to say "the end is near" is always true, no matter when the end really happens.
I'm not saying I believe that way. I'm just explaining why your mom would contradict herself and say even if the end isn't near, and that part about dying. Witnesses have a "unique" way of thinking...of explaining away paradoxes and contradictions. Makes the mind boggle.