The slave is on a high mat, which is filled with springs, ready for to have some sitting and bouncing fun.
Julai steps over him, decends her ass with a impact on his chest and moves on his throat.
After some bouncing adn riding-moves on the throat, she moves back and lands on his face.
From now, the slave can be happy, when she bounces, because this are the only moments for getting a sip of air.
A sip of air then another impact of the fleshy ass!