Isabella in riding-outfit (jodhpurs and ridingboots) meets her slave on the floor.
After some teasing with her boots, she steps on his chest and let him feel her weight.
Soon she sits down on his belly and moves foreward on his throat, squeezing the head between her tighs.
Then its time for the facesit, taking his air-supply.
She sit foreward, reverse and also some sideward on his face and throat.