Erm... OK, but I've actually, you know, talked to my parents about this during the decades since. Nobody remembers this particular event because it was one night out of weeks of things getting bad, then worse, before finally getting better. This was almost certainly not the only time the grandparents visited, but it's the only one I remember.
Adults' memories don't just play out like a recording either. They remember many other details that wouldn't have been shared with me even if I could have understood it.
I’m sorry but, what? You think your extended family visiting a child in a hospital due to illness was not a notable event for them?
> They were all worried.
As a parent I can assure you it was a notable event, or no one would have been there, and they would not have been worried.