What did PaulB and OPA do when his MOM went to the hospital?

PaulB opted to go for Chinese Dinner where he showed off his expertise with chopsticks
and adressed the Chinese-Vietnamese Waitress with : "VOILA"
when she said she knew a bit of French.
Opa briefed him on his new responsibilities as an older brother.
He was going to visit his baby sister in the hospital.

Now here's a good Chinese riddle, he said:
Opa's father had 8 brothers and sisters
but he never went to visit any of them in the hospital.
How come?
No, it was not because they were not born in hospital,
Good try but ....
try again...