Rather than being Stapleton's daughter, Miss Stapleton is Stapleton's wife in the novel and is playing the part of his sister. She does not hate Sir Henry, as she does in the film, and is a far more sympathetic character in the novel.
The character of Miss Stapleton in the novel differs significantly from her portrayal in the film adaptation. She is not Stapleton's daughter but his wife and portrays the role of his sister.  She does not harbor hatred for Sir Henry as depicted in the movie, instead being a more sympathetic figure in the book.