Reputation at Risk by Martha Keyes

Their choice? Scandal or mutual salvation.

Determined to support her mother and sisters after her father’s untimely death, Charlotte Mandeville covertly crafts satirical caricatures of high society. It not only puts money in her family’s bare pockets but ensures the haut-ton cannot guard all the power and the secrets.
Anthony Yorke has a guilty conscience and a brother to exonerate. When the key piece of evidence to clear his brother’s name falls into the hands of a headstrong young woman, he is willing to do whatever is required to obtain it from her.
But Charlotte is not easily persuaded, and while the thing she demands in return for the evidence is reasonable enough, it leads to the unthinkable: a forced engagement between them.