"The only reason to give up one's mistress is if one happens to love one's wife. And as I do not intend to choose a wife with whom I might fall in love, I see no reason to deny myself the pleasures of a lovely woman like you."
This is Anthony, the book's supposed hero, talking to a former mistress of his about the prospect of renewing their relationship. He thinks it's a private conversation, but he doesn't realize that Kate is listening in. The future wife he doesn't intend to fall in love with is Edwina, Kate's younger sister.
Like most of Quinn's books, this is making for smooth reading, and there's occasional fun banter. Unfortunately, I'm not happy with Anthony as a romantic hero. He may be an excellent brother and son, but as a potential husband, he seems like garbage. Earlier, Edwina and Kate had a conversation in which Edwina said she thought he'd make a good husband because everyone always says he's so kind to his family members. Kate responded that men don't always view their wives as being in the same category as blood relatives. Anthony appears to be one of those men, and it really doesn't speak well of him.