Siobhan understands what Christopher is going through more than his parents because of her job at a school for children with learing difficulties. She always tries to treat him humanly and understands (and respects) when he needs to be left alone. She always encourages him. His parents on the other hand, find it all to much. His mother, Judy, left because she didn't have enough patience for Christopher and everything he needed. His Father, Ed, was a lot better but still raised his voice at him for asking questions or being curious which is something Christopher can not help. I hope this helped :)