Royal Revels (Regency Mystery/Romance‪)‬

Deirdre Gower, newly betrothed to Lord Belami, expected to marry at once, not rush off to Brighton with her aunt and her fiancé. But the Prince Regent was in double trouble--a beautiful blackmailer and a questionable long-lost son. Could Lord Belami extract Prinney from this coil without losing his fiancée? Regency Romance/Mystery by Joan Smith; second of the quartet of Lord Belami mysteries, originally published by Fawcett