Julia-Eva, in nice rider outfit with boots and jodphurs, kneels on her slave's arms and holds him down with a schoolgirlpin (SGP).
He tries to resist, buckels like a rodeo-horse, but she rides this out, he's to weak or she's to heavy for him.
Soon he's moving less and she can move foreward, strech her legs and sit foullweight on his throat, squeezing his face to a pulp.
Then she cuts off air-supply with her breasts,or she countinues with rodeo-style riding.