Gwen tells Kinsey that Laurence had an affair with the wife of a judge. What does Kinsey do with this information, and what does she find out?

Kinsey decides she must contact the wife of the judge, whose name is Charlotte Mercer. Charlotte tells Kinsey she broke off the affair with Laurence but that he came back "like an old tomcat" not long before he died. Charlotte did not believe Laurence had an affair with Libby but that he did have one with Sharon Napier's mother. Sharon blackmailed him over this, and he hired her as his secretary, which was basically a paid job where she did nothing.