Let me see if I've got this straight... sort of...

I am the other 'twisted soul' in question, W's younger brother. I don't approve of a great deal of what my mother has done, and I wish she cared about her children from their perspective instead of her own. But while you are considering another human being to be a demon, you don't have the story straight. As I repeatedly point out in this family's journals, K has emotions and is acting in a manner she believes to be right, even helpful. Thinking of another person as inherently evil does you no good, and propagating the notion keeps pushing back the hope of reconciliation, or at least a mutual understanding.