I don't like how the system treats foster children, and from what I've gathered it's even worse in the USA than over here. But the safety and well-being of the kids comes first, and adults who can speak for them should. Maybe you could talk to the kids and see what they think about their situation, because most abused children don't know that their situation is abnormal. And it might be a good idea to talk to the mother, though one should never take out one's suffering on others, she might be a victim too, despite her being the culprit in this drama.
When I was young, there was a god with infinite power protecting me. Is there anyone else who felt that way? And was sure about it? but the first time I fell in love, I was thrown down - or maybe I broke free - and I bade farewell to God and became human. Now I don't have God's protection, and I walk on the ground without wings, but I don't regret this hardship. I want to live as a person. -Arina Tanemura