I just don't know what to say about her viewing porn at the age of 12 apart from the fact that I am horrified.
Yes, it's horrifying that children are watching porn, but it's not helpful to keep on about the OP about that, this is part of a much wider phenomenon, and sadly not that unusual.
Children are accessing porn much more easily and much younger than people of our generations did as kids.
According to research by the UK Safer Internet Centre, 28% of 11-12 year olds who responded to their survey had accessed porn online, although I've seen this quoted as high as 50% elsewhere:
www.saferinternet.org.uk/blog/impact-online-pornography-children
Covering another report's findings on children watching porn, the Guardian said:
Parents are oblivious of the extent to which their children are watching pornography, according to a rare in-depth study of teenagers’ viewing habits that shows adult material has become a normalised part of young Britons’ lives.
The report’s authors concluded that parents of 16- to 17-year-olds were either in denial or largely unaware of what their child viewed online, with the parents of teenage girls the most likely to be unaware their children were watching pornography
The research, conducted as part of the government’s troubled attempt to introduce age-verification services for online pornography, found that children were often disturbed by being accidentally exposed to material at pre-teen age. But it also found that it provided a significant way for older gay, lesbian, and bisexual teenagers to understand their sexuality.
The study involving teenagers and their parents across the UK found:
• British teenagers are increasingly turning to pornography as an educational tool because schools do not tell them “what to do” in early sexual encounters, with teachers instead focusing on issues such as contraception.
• Most children had viewed pornography they found disturbing or overly aggressive, with many saying they believed it influenced how they behaved in sexual encounters and influenced concerns about body image.
• Viewing pornography has been normalised among children from their mid-teens onwards, with more encountering it on networks such as Snapchat and WhatsApp than on dedicated pornography sites.
www.theguardian.com/culture/2020/jan/31/porn-survey-uk-teenagers-viewing-habits-bbfc