What more is there to be said?
And all this recalls what my father used to say.

De Brissac and the Marquis de Perigny were deadly enemies.

It seems that De Brissac had one love affair; Madame la Marquise while she was a Savoy princess.
She loved the marquis, and he married her because De Brissac wanted her.

But De Brissac evidently never had his revenge." Madame felt that she could no longer sustain the conversation.

In her own mind she was positive that her daughter and the son of her old flame had never met.