Lady Lorna — Joan Smith

Kate Simmons and her mother, Lady Simmons, are amazed to find Lady Lorna, who has been missing for twenty years, on their doorstep. Though Kate was an infant when Lady Lorna disappeared, presumed to have been kidnapped by gypsies, her mother recognizes her old friend immediately. Lady Lorna's younger brother, Lord Acton, and his aunts refuse to acknowledge her claim, but there is something they're not revealing… Regency Romance by Joan Smith; originally published by Belgrave House/Regency Reads