Katrin (ab)uses her slave as her yoga-mat. She sits on his belly, chest, throat and face and does her yoga-streching-practice.
While she streches her legs and arms, he has to endure under her heavy ass; can be sometimes diffcult to breath with more than 150lbs on the throat and chest, with every breath he has to lift up her entire weight.
And if she places her round ass on the face, his air-supply is off, completly off!!!!