I search Kathleen Dehmlow and found there was an article how the children should forgive her for something that happened a long time ago.

Here’s the thing, the children were not children when they wrote this. They had lived their lives. A destroyed childhood by their mother. Had to be raised by grandparents for many years. Had to compare themselves to other children in their class, explain their situation to their friends. It carried on for years and into full lifelong adulthood.

That situation is not recognised as child abuse. But it damn well should be.