Weird - Mother and boyfriend sentenced to more than 5 years for the violent death of her child

The normal image of a mother is one who protects her baby and children at all costs; in fact, in nature, a wild animal is treated as even more dangerous if it is protecting its young - the concept of being a mother is that even nature produces far more hormones to increase this child protection instinct in the mother. So when a baby is found battered with more than 50 injuries, including a broken back and ribs, it would outrage the whole country. What made this crime in England even worse was that social services had the case on their watchlist, and the injured baby escaped inspecting social services workers and a doctor who examined the baby. The workers were fired, and the mother has now been sentenced for a minimum of 5 years (link to article):

Sentencing the mother to a minimum of five years in prison for her role in her toddler's horrific death, Judge Stephen Kramer called the woman "manipulative and self-centered." She and her boyfriend, both of whom cannot be identified for legal reasons, were found guilty of causing the death of the child.
The blonde, blue-eyed toddler had been on a child protection watchlist and was visited dozens of times by social workers. The head of the local children's services, Sharon Shoesmith, initially denied responsibility, but has been fired. She is appealing the decision. The social worker in charge of Baby P's case has also been fired. And the doctor who last saw Baby P and failed to diagnose his broken back and fractured ribs has been dismissed and is no longer able to practice medicine without supervision.