And then had come the unlooked-for tidings of the imminent proceedings for divorce. And such a divorce! There were cross-suits and allegations and counter-allegations, charges of cruelty and desertion, everything in fact that was necessary to make the case one of the most complicated and sensational of its kind. And the number of distinguished people involved or cited as witnesses not only embraced both political parties in the realm and several Colonial governors, but included an exotic contingent from France, Hungary, the United States of North America, and the Grand Duchy of Baden. Hotel accommodation of the more expensive sort began to experience a strain on its resources. "It will be quite like the Durbar without the elephants," exclaimed an enthusiastic lady who, to do her justice, had never seen a Durbar. The general feeling was one of thankfulness that the last of the strikes had been got over before the date fixed for the hearing of the great suit.
from East of the Web
In this case what does it mean "to do her justice"?
Why do people need to do her justice?
If people don't do her justice, what happens?