Kumiko had never had an enema in her life, but her master as determined that his slave would be absolutely ready to receive the largest loads in her life through the butt. She was on her knees for hours when he grabbed a steel expander to train her anus to squeeze and let go as he pleased. She squirmed and moaned hard when she felt the cold, steel head of the expander touch the side of her sensitive butthole. M-master, she said, asking for a little lenience as she saw that the expander was very long. The steel began digging into her anus little by little, giving her a butt-fuck of a lifetime.
