Our mind are sometime not with us, the soul. If u notice that at
time in our daily life, while we are thinking or looking at
something, we went blank for a while then wake up from it when
someone alerted us. And you can't remember what u are thinking or
doing, that is when the mind left us for a while. Usually
monotonous jobs or chores such as cooking, housework, line
production work and watching exciting shows, make us end up in
hallucination for a while.
I guess your auntie just went blank for a moment.