In Forrest Gump, it's heavily implied that Jenny and her sisters were sexually abused by her father. Said trauma leaves her to be a promiscuous drug addict, later on.
In Dr. No, Honey Ryder tells James Bond that after her father was made to disappear by Dr. No, their landlord let her stay on for a while without paying. Then one night he raped her. She avenged herself by putting a female black widow spider in his bed, which fatally bit him.
Carin, the Straw Feminist of Patch Adams was molested as a child, hence why she distrusts men. Once she learns to trust them again, she lets herself get too close to a crazed patient who murders her. Being a biography film, this would typically go into Real Life except that Carin never existed and was created for the purposes of the film.
The eponymous character of Chasing Amanda mentions being raped by her brother almost casually. Her uncle is appropriately stunned, but she zips right by it. Her treatment of the subject may be partly due to her tendency to "hide" from her own life, but it still feels like an attempt at cheap sympathy for a movie lacking in sympathetic characters.
Lexy in Adulthood.
Martha Beck in The Lonely Hearts Killers, though this is Justified, as the Real Life Martha Beck claimed to have been raped by her brother.
Chances are at least one character in a Tyler Perry film has this excuse.
A rare unsympathetic male example in Bad Education (2004). Ignacio was molested by a Pedophile Priest when he was a child. As an adult, he chooses to blackmail this priest into giving him 1 million pesetas to pay for his heroin addiction.
In Wild at Heart, Lula was attacked at a very young age by a family friend; upon learning that, Marietta arranged for him to be murdered.
You can infer in The Missing that Maggie's first daughter was conceived this way.
Mad Max: Fury Road and its tie-in materials all suggest—though never outright confirm—that Furiosa was originally used as one of Immortan Joe's "wives", only to be cast out for being infertile.
Joe also had raped all of his current wives except for Cheedo (and even then, the only reason he hadn't successfully assaulted her was that The Dag stood up to him when he tried), and at least two of them are pregnant as a result. In fact, the whole plot of the movie is kicked off by the wives wanting to free themselves and their future children from Joe's tyranny.
It's also possible that this is the case for the women used as cattle for mother's milk, as Joe has been a slaver-polygamist for a long time. Basically, if you're a relatively healthy (as in, not terminally ill or horribly mutated) woman living on the Fury Road, there's a solid chance you've been raped by Immortan Joe at some point.
The eponymous character in the film Rosario Tijeras, a Colombian assassin girl, has that nickname (Tijeras means scissors) because she castrated the man who raped her with a pair of scissors. She also was molested by her stepdad.
Artemisia in 300: Rise of an Empire saw her entire family been raped and murdered in front of her by Greeks and then she was raped and sold as a sex slave, living as such in a ship for many years.
Faust: Love of the Damned: Jade was raped when she was only 11. She is still plagued by flashes of a faceless man breaking into her room at night. This is later revealed to be her own father, whose body was possessed by the devil.
As her story is told in flashbacks, we learn in Original Sin that Julia (played by Angelina Jolie) was gang-raped by four men when a scam in a poker game went bad.
The reason why Josey Aimes (Charlize Theron) is a single mom in North Country, as we learn in one of the trial scenes.
Probably the reason behind Evie's disruptive behavior in 13 as is revealed that she was raped by her uncle.
The eponymous character Tank Girl was raped by her father at some point in her past, as she jokes about it in one scene. This is likely one of the causes of her eccentric behavior and also the reason why she takes such a strong defense of her 11-year-old friend Sam who is herself almost raped in a whorehouse.
Bev in It (2017) is heavily implied to have been molested by her father (which is more openly acknowledged in the book).
Interestingly two of the most modern adaptations of Henry James' The Turn of the Screw give this backstory to the Governess: 1999's Presence of Mind with Sadie Frost and 2006's In a Dark Place with Lee Lee Sobieski. In the first case due to her father's molestation, in the second after a random attack as a girl.
One of the many abuses that Alessa Gillespie suffered in Silent Hill includes rape from the Janitor, who catches her in the bathroom whilst escaping the bullying of her classmates.
Flowers of War: Yu Mo reveals that she was first raped by her stepfather, who then sold her to a brothel before she was even thirteen where she "serviced" countless men.
In the 1993 horror flick Ticks, Kelly, the shyest of the campers, is there at the rehab excursion because she was assaulted and has had trouble communicating ever since.
Listen To Me: Monica reveals in the final debate how she suffered this when just fourteen. Tucker at first thinks it was just a made-up story, given that Charlie told one earlier to sway people, but then realizes it's true.
Slack in Land of the Dead makes clear she was forced into prostitution by the city's government.
Interestingly this trope is often given to Olga Kurylenko's characters:
As Etienne the Brigantian tracker in Centurion; her village was raided by Romans, her father burned in front of her, her mother raped and murdered, and then she herself was raped by the Romans who also cut her tongue out.
In Quantum of Solace she plays a Bolivian expat who wants revenge against the General that raped and murdered her mother and sister. She wasn't raped herself by him, however in order to get close to the General she has to sleep with a crime boss he's dealing with and seems truly embittered by it.
The reason why her character wants to kill Russian President Arkady Fedorov in The November Man is that her family was murdered in front of her and she was repeatedly raped by him when she was a child.
M.F.A.: We learn that another woman on campus, Lindsey, was gang-raped by frat boys around a year before what happened in the film. Skye was also raped, as Noelle discovers.
Compulsion: It's revealed that Saffron, while just a teenager, was raped by a casting director (which her mother arranged to get the part for her).
Bit: Duke relates to Laurel that while working as a prostitute she caught Vlad's eye. He then turned her and made her part of his harem for years before she could escape.
Closet Land: The Author was sexually abused as a child, something the Interrogator hints at and questions her about for much of the movie. Finally, in a last-ditch effort to get her to confess, he claims to be her rapist. It's the only major thing we know about her past.
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