The duke accompanied her to Paris, where he continued to see her as he had done at Bagneres.
This liaison, whose motive and origin were quite unknown, caused a great sensation, for the duke, already known for his immense fortune, now became known for his prodigality.

All this was set down to the debauchery of a rich old man, and everything was believed except the truth.

The father's sentiment for Marguerite had, in truth, so pure a cause that anything but a communion of hearts would have seemed to him a kind of incest, and he had never spoken to her a word which his daughter might not have heard.
Far be it from me to make out our heroine to be anything but what she was.

As long as she remained at Bagneres, the promise she had made to the duke had not been hard to keep, and she had kept it; but, once back in Paris, it seemed to her, accustomed to a life of dissipation, of balls, of orgies, as if the solitude, only interrupted by the duke's stated visits, would kill her with boredom, and the hot breath of her old life came back across her head and heart.
We must add that Marguerite had returned more beautiful than she had ever been; she was but twenty, and her malady, sleeping but not subdued, continued to give her those feverish desires which are almost always the result of diseases of the chest.
It was a great grief to the duke when his friends, always on the lookout for some scandal on the part of the woman with whom, it seemed to them, he was compromising himself, came to tell him, indeed to prove to him, that at times when she was sure of not seeing him she received other visits, and that these visits were often prolonged till the following day.

On being questioned, Marguerite admitted everything to the duke, and advised him, without arriere-pensee, to concern himself with her no longer, for she felt incapable of carrying out what she had undertaken, and she did not wish to go on accepting benefits from a man whom she was deceiving.