This showed itself later on.

Then many months passed, and Mrs. Schreiderling took to being ill.
She did not pine away like people in story books, but she seemed to
pick up every form of illness that went about a station, from
simple fever upwards. She was never more than ordinarily pretty at
the best of times; and the illness made her ugly. Schreiderling
said so. He prided himself on speaking his mind.

When she ceased being pretty, he left her to her own devices, and
went back to the lairs of his bachelordom. She used to trot up and
down Simla Mall in a forlorn sort of way, with a gray Terai hat
well on the back of her head, and a shocking bad saddle under her.
Schreiderling's generosity stopped at the horse. He said that any
saddle would do for a woman as nervous as Mrs. Schreiderling. She
never was asked to dance, because she did not dance well; and she
was so dull and uninteresting, that her box very seldom had any
cards in it. Schreiderling said that if he had known that she was
going to be such a scare-crow after her marriage, he would never
have married her. He always prided himself on speaking his mind,
did Schreiderling!

He left her at Simla one August, and went down to his regiment.
Then she revived a little, but she never recovered her looks. I
found out at the Club that the Other Man is coming up sick--very
sick--on an off chance of recovery. The fever and the heart-valves
had nearly killed him. She knew that, too, and she knew--what I
had no interest in knowing--when he was coming up. I suppose he
wrote to tell her. They had not seen each other since a month
before the wedding. And here comes the unpleasant part of the