Build a movie plot around this: What mental illness does Jacqueline have? Borderline personality disorder
The answer to this question is:
On Thanksgiving Day, 1983, Georgetown college student Marty Pascal (Josh Hamilton) brings his fiancee, Lesly (Tori Spelling), home to his family's large estate located in McLean, Virginia to meet them for the first time. Marty is obviously nervous and hesitant about the impending introduction of his future wife to his family; he has informed them that he is bringing a guest but without any further details.Marty's family prepares both for his arrival and for an impending hurricane. Marty's twin sister Jacqueline (Parker Posey), recently released from a psychiatric hospital, is ecstatic about his arrival, until she is informed that a "friend" is accompanying Marty. She becomes distressed and, over the course of the night, shows many signs that suggest she suffers from borderline personality disorder, including sudden mood swings and an inability to cope with change.Referred to as "Jackie-O" by her family, Jackie has had a long obsession with the former first lady and the Kennedy assassination. As an adult, Jackie-O still emulates the former first lady in her style of dress and her hairstyle.Jackie-O lives with her mother and her younger brother Anthony (Freddie Prinze, Jr.). He and the matriarch of the family, Mrs. Pascal (Genevieve Bujold) are very protective of Jackie. Mrs. Pascal is immediately suspicious and guarded against her future daughter-in-law Lesly.Meanwhile, Lesly is initially oblivious to the tumultuous nature of the family. It is clear that Marty is in love with Lesly's "normalcy" and their engagement is a way for him to break from his family mold.As the hurricane outside intensifies, Marty and Lesly become stranded in the house until the storm lets up. After meeting Lesly, Jackie-O comes close to a melt-down at her bathroom sink, yet suddenly gains her composure and surprises Lesly. Jackie playfully interrogates Lesly about her love life with Marty, going so far as to ask for graphic details about their sexual escapades. Jackie-O informs Lesly of a nearby former girlfriend of Marty's, with whom...