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.
Contrary to the portrayal in the movie, Miss Stapleton is actually Stapleton's wife in the novel, taking on the persona of his sister.  She doesn't despise Sir Henry as she does in the film adaptation, instead being a much more sympathetic figure in the literary version.