The one’s I knew did not smoke. There were 12 brothers & sisters total, and I did not know them all.
I think the smoking matters. On the other hand, my grandmother is entering her nineties and is in pretty good shape, and she smoked like a chimney into her fifties, at which point she nominally quit, only sneaking a cigarette every now and then. Anyway, hats off to your great aunt and may she have many more years with us.