Was that her younger sister at the house wearing the school jumper?
I thought it was just a younger relative of the boy Holly first went around to 141 to see. She'll be 'recruited' into the abuse.
It's utterly depressing and enraging that rape culture is so ingrained in society that once a girl has past puberty that there's a feeling she's responsible - even if it's only an inkling of a feeling in a person: but it shows up in the thinking she could have prevented it, or she could have not gone back for more, or the ultimate one that because she's had sex before then she should be ok to have sex with any man that wants to have sex with her.
I do think the have shown the grooming going on. I don't know how much more they could have shown it.
'Daddy' treated them well, providing treats in the way of free food, and then introduced alcohol. This all caused lonely unloved (Holly felt so) girls to feel wanted and special. When he first raped Holly she was shocked at the idea that his kindness had been done with intention. She definitely said no. He over powered her and then threatened her: she did tell the police and her parents knew. The police did nothing (except make out it wasn't really anything wrong) and then released Daddy. She went back because he threatened her, her younger sister with rape and her parents.
I don't think society's opinion of women and sex accept how fear can make a woman (or adolescent girl) engage in sex, and because she has engaged in it then she's chosen to do so at some.
Only when a woman or adolescent girl is physically overpowered then this idea she didn't really chose to might occur. But even then the fact that she put herself in the situation means she partly caused it.
The social works and police can be seen to think like this.
You can see it in this thread a bit, there's even those that found it harrowing questioning why she put herself in the situation.