Woman Who Murdered Husband Regains Custody Of Children

What kind of world do we live in that a woman who shoots her husband in the back with a shotgun only serves 12 days in jail AND gets custody of her kids back? Now, even if he was abusive as she claims, shooting him in the back with a shotgun while sleeping isn't a very logical escape. At the very least it deserves more than 12 days in jail as a punishment. If her logic drove her down that path, why on earth would the courts risk putting her children back with her? What if they push her to her limits?