What caught my attention about this episode was how the main character/victim was made to be complicit in her own demise, something women are taught from birth. Women die from being too polite, from being conditioned to always put others' needs before their own and never hurt someone's feelings -- even if that someone is hurting them. One of the first things we are taught at women's self-defense classes is how to get over our deeply-ingrained conditioning, which acts against our own instincts for danger, and not to second-guess the act of defending ourselves to keep from being assaulted or murdered.
Throughout the story, Julie is painfully aware of the danger she's in, from a sort of tongue-in-cheek acknowledgement that her predicament is a total horror cliche, to the moment she realizes that the father has killed before and now means to do so again. Yet her lifelong conditioning as a female keeps overriding her survival instinct, telling her not to be a tease, maybe she's wrong about him, she should just let him rape her and deal with the aftermath later. Society has etched into her that she should be complicit in her own demise because she is a girl, a woman, and therefore whatever happens to her is her own fault. Her murderer is right and denying him his pleasure in killing her would be rude, so just go along with it.
I saw the story less about Julie as a victim of the monster father and his monster-in-training son, as a victim of a world in which her most basic, most animalistic instinct for survival was taken from her so that she could be put in this situation at all.