The slave is hidden under a towel trapped in the floor, he cannot move, neither turn his head... he's completely at her merci.
First she ignores what's hidden under the tovel, and explores his body, hand, legs.. and privat parts with a little walking on it.
The it's time to explore the face; slowly she takes the towel away and begins to foot-play with the face, squeezing it, pinching his nose... and so on...
And finally she lands with all her weight concentrated on the face... poor face.
The martyrium continues, she walks and steps on all parts, trying painfull moves on them...
It's Ronja, a real sadist;-)