Well, if the fact description is true, isn’t the bride’s family the one who pays for the wedding (except booze)? My wife’s family was of modest means (as was I), so we had a small reception in the church basement. Suited me fine.
But then I am a idealist. Or a cynic.
But to your point it depends on the country and the culture. For example if her family is mohammedan (poor girl who I am not sure is real) then the grooms family pays.
Chinese culture, groom family pays. Korea, bride family pays. Thailand groom pays and may fork over a dower although that is going away.
European culture it is usually the bride's family that pays.