I would be. The kids will one day still want to know who their mother was. They should be taken away from her and put into good foster care homes or adopted, but they would still want to know at some stage. This woman should be put in prison, to rigorous imprisonment for endangering the life of a minor and to whatever else. This would mean at least a 2 year sentence I'm guessing (I don't know) and after that she should be put on probation for a long time.
She's still the mother, the demon-mother perhaps, but still the mother. If she was some other woman or worse a man, i'd fully agree with the harshest penalty.