Lena lies on the bed and Yvette orders the slave to worship her ass.
She does it really serious with all power what she has.
She shoves his head, face down, in Lena's ass, sits an kneels on him for using her weight to push him in Lena's ass-crack.
Then she steps on his head, ensuring that she presses the face with all her weight in Lena's sweet ass.