I also never said the 11 year old should "bare some of the responsibilities". The intent of my question was to ascertain whether she might have said anything to an adult, to find out why help wasn't given to this family.
Frankly, I find your judgmental views and lack of compassion "appalling". For you, and others, who just want to judge and blame the mother; try to put yourself in her place. Can you imagine the horror & sadness you would feel knowing that you killed your children? Now also imagine how you feel when you discover that it was because you were mentally ill AND nobody helped you or your children.