A Clandestine Affair (a Regency Romance‪)‬

Mary Wyndham, living quietly and courted by the local curate, is startled when her brother arrives with pretty heiress Teresa Standish (and her talkative parrot). Their marriage is opposed by Teresa's guardian, Sir Ingram Leigh, whom Teresa believes is trying to gain her fortune by nefarious means. When Sir Ingram comes to separate the lovers, Mary finds him attractive, but can't quite dismiss Teresa's allegations...  Regency Romance by Sally James; originally published by Hale [UK]