Baby Peter's mother has been jailed indefinitely and told she will serve at least five years for her role in her son's death.
Sentencing her, the judge rejected the suggestion that she was "blind to what was happening in that house" or that she was "naive".
She showed no emotion until her boyfriend was sentenced to life, when her mouth fell open and she appeared to mouth "No".
The little boy's "stepfather" could be out of jail in 12 years after his part in both Baby Peter's death and the rape of a toddler.
The 32-year-old man, who cannot be named, was given a life sentence with a minimum term of ten years for the rape, and 12 years for his part in Baby Peter's death, to run concurrently.
The couple's lodger Jason Owen, 37, was given an indeterminate sentence for public protection with a minimum period of three years.
Meanwhile, a serious case review has concluded Baby Peter's death "could and should have been prevented".
It found that agencies would only have been willing to move him if the injuries he suffered were found to be "non-accidental beyond all reasonable doubt".
Jailing Baby Peter's tormentors, Judge Stephen Kramer said: "Any decent person who heard the catalogue of medical conditions and non-accidental injuries suffered by Peter cannot fail to have been appalled.
"It was clear that significant force had been used on Peter on a number of occasions.
"Whatever the truth of what took place and the role and motivation of each individual, the result was that a child died in horrific circumstances with injuries that can only have caused great pain and distress prior to his death."