Mistress Maria's slaves need to be willing to take any pain for her - no matter how much it hurts! Today she ordered a slave to lie down near the stairs and steps on his body wearing her high heel boots. But that's not real pain YET so she steps right on his face and stands on it while applying her whole weight on her pain-inflicting boots.
Mistress Maria doesn't tolerate weak slaves and to test their strength she usually tries facestanding with high heel boots. Of course that's extremely painful but if her slaves don't want to be punished they better take it!