I have found this incredibly moving piece on being the parent of a perpetrator and survivor of sibling abuse.
What is most distressing is the judgement the parents are experiencing and the lack of support and action by authorities. When will people take this abuse seriously? Why should the victims horrendous experiences be dismissed in this way because of the fact her abuser was her sister. As long as this keeps being swept under the carpet in this way nothing will change to tackle this dangerous form of abuse.