Mistress BlackDiamoond wanted to find out her slave's breath retention skills. She facesat on him and crushed his face and smothered it with her ass. The slave was inside a carpet roll and he was defenseless. He could not push her or do anything to obstruct her. He tried his best to hold his breath because it was the only thing he could do. His body really stretched itself to retain as much air as it could and the mistress was impressed.