She was not equal to that.

Her great desire was to escape unseen, and with a veil drawn closely over her face, she sat in the darkest corner of the ladies' room, waiting impatiently for the arrival of the train, and glancing furtively at the people around her.
Groups of men were walking up and down upon the platform without, and among them Frank Van Buren.

On his way to the cars he had called again at the Stafford House, and learned that Mrs.Markham was out.
"I'll see her when I return," he thought, and so went his way to the train, which would take him to his next point of destination.
Never once dreaming how near he was to her, Ethie drew her veil and furs more closely around her, and turning her face to the frosty window, gazed drearily out into the wintry darkness as they sped swiftly on.

She hardly knew where she was going or what she could do when she was there.
She was conscious only of the fact that she was breaking away from scenes and associations which had been so distasteful to her--that she was leaving a husband who had been abusive to her, and she verily believed she had just cause for going.

The world might not see it so, perhaps, but she did not care for the world.