Julia uses her slave as a piece of furniture for her pleasure.
She sits down on his chest seeks a comfortable position for her, better said an incomfortable for him.
first she does a schoolgirlpin on his body and throat, for makes it harder for him she also kkneels on his throat, crushing his larynx effectively.
Soon she places her big fleshy ass right on his face, no breathing, but a heavy weight soft pressing on the face.
She continues with changing the sitting direction and position, kneeling bouncing and so on.