I think Xenia is referring to what the boy said in one of the interviews which is linked here, earlier in the thread.
(Though I'm quite sure she doesn't need me to say this!)
Honestly, the more I read about this in the paper, the more it makes me feel really, really sorry for the boy.
I try not to judge other people's parenting but, tbh, find it hard not to, when this story is so ubiquitously present in the papers. And I find myself agreeing that the children, it seems, were just given too much self-responsibility, far too young.
I had a lot of friends whose parents were counter-culturalists of the 60s and 70s. Listening to their stories I have sometimes wondered if (some) adults are squeamish about the "power" as parents they exercise over their children. They have an overly-negative view of the boundary-setting/enforcing aspect of parenting. This combined with a desire to foster "autonomy" in their children, leads to an abdication of some quite crucial aspects of the parent role.
Obviously, I have absolutely no idea if that was the case here. Though it is what I used to think when reading LWT, where the writer hogged the "poor little girl, protect me from nasty teenagers" role for herself. (I thought it was so weird I couldn't read it.)
I suppose it's just a general point that raises itself in my head as I come across this really awful, awful experience, yet again.
And I've now decided that writing about it, when she is in such a powerful position, is a kind of theft.