Madame de Coetquen was the Chevalier de
Lorraine's mistress, although Madame did not know it; and she contrived
that the Marechal de Turenne should become attached to her. Madame
having told the Marshal all her secrets respecting the negotiations with
England, he repeated them to his mistress, Madame de Coetquen, whom he
believed to be devoted to his mistress. This woman went every night to
the Chevalier de Lorraine and betrayed them all. The Chevalier used this
opportunity to stir up Monsieur's indignation against Madame, telling him
that he passed with the King for a simpleton, who could not hold his
tongue; that he would lose all confidence, and that his wife would have
everything in her own hand. Monsieur wished to know all the particulars
from Madame; but she refused to tell him her brother's secrets, and this
widened the breach between them. She became enraged, and had the
Chevalier de Lorraine and his brother driven away, which in the end cost
her own life; she, however, died with the consciousness of never having
done her husband any harm. She was the confidante of the King, to whom
it had been hinted that it might be expedient to give some employment to
Monsieur, who might otherwise make himself beloved in the Court and in
the city. For this reason the King assisted Madame in her affairs of
gallantry, in order to occupy his brother. I have this from the King
himself. Madame was besides in great credit with her brother, Charles
II. (of England). Louis XIV. wished to gain him over through his sister,
wherefore it was necessary to take part with her, and she was always
better treated than I have been. The late Monsieur never suspected his
wife of infidelity with the King, her brother-in-law, he told me, all her
life, and would not have been silent with respect to this intrigue if he
had believed it. I think that with respect to this great injustice is
done to Madame. It would have been too much to deceive at once the
brother and the nephew, the father and the son.

The late Monsieur was very much disturbed at his wife's coquetry; but he
dared not behave ill to her, because she was protected by the King.

The Queen-mother of England had not brought up her children well: she at
first left them in the society of femmes de chambre, who gratified all
their caprices; and having afterwards married them at a very early age,
they followed the bad example of their mother. Both of them met with
unhappy deaths; the one was p