Sentencing, Mrs Justice Lambert said it was impossible to watch the CCTV footage, which captured much of Sebastian's abuse in the home, without being "utterly horrified".
She said Latoszewski was a "bully" who sought to intimidate and frighten Sebastian, regarding him as "easy prey".
Addressing Kalinowska the judge said she "just did not care" what was happening to her son.
The judge described how the footage captured body builder Latoszewski using the teenager as a "punchbag" while his mother "sat indifferently on the sofa, eating, drinking or watching TV".
She said: "It shows you, Latoszewski, using your martial arts techniques to punch, and kick Sebastian repeatedly about the torso and head, using Sebastian's body in the same way you used the punchbag in your garden.
"Kalinowska, you were almost always present when the abuse was inflicted."
She said Latoszewski was a "bully" who sought to intimidate and frighten Sebastian, regarding him as "easy prey".
Addressing Kalinowska the judge said she "just did not care" what was happening to her son.
The judge described how the footage captured body builder Latoszewski using the teenager as a "punchbag" while his mother "sat indifferently on the sofa, eating, drinking or watching TV".
She said: "It shows you, Latoszewski, using your martial arts techniques to punch, and kick Sebastian repeatedly about the torso and head, using Sebastian's body in the same way you used the punchbag in your garden.
"Kalinowska, you were almost always present when the abuse was inflicted."
Sebastian Kalinowski: Mother and partner jailed for life for murdering teenage son
Agnieszka Kalinowska and Andrzej Latoszewski are jailed for at least 39 years for killing her son.
www.bbc.co.uk
