When I was still a dub, an older lady of the congo said to me (as I recall) privately once, 'We've been told for fifty years Armageddon is coming soon. I don't know why it hasn't or what really to think and I'm a tad upset.'
Poor baby-boomers like my dad were told they'd never finish high school because Armageddon would come.
People like your mom are becoming rarer, I think. A lot of JWs probably couldn't even explain the expected chain of events leading to the great tribulation, nor could they show you from the Bible, nor really do they care. Some older ones still care....... I guess.