Emily likes to sit on her slave, (he also likes to be sat on)
She steps over him and decends, kneels on his arms and uses her weight for holding him down on his back.
He tryes to resist, buckles and bridges, but his atemps are to weak and he fails, so she manages to stay on top for the whole clip.
She holds him down with kneeling on his chest, it must hurt because her weight on the bony knees pressing in his ribs.
His attemps are getting weak and weaker, she only has to sit on him and hold him down with her weight.
She is heavy enough for making his breath difficult and weakening him more.
Now she has her human seat!