Elly lay naked on the soft silk sheets of Bob’s massive bed, her body trembling slightly from exhaustion and anticipation. The metal collar around her neck felt familiar now, almost comforting in its weight. The chain attached to it rested across her big, heavy boobs. The fresh "B" brand just above her smooth pink pussy still tingled with a dull heat, a permanent reminder that she belonged to him completely. Weeks of training had changed her. Her once innocent eyes now held a mix of fear, shame, and strange desire. Her tight pussy and round ass had been stretched and used so many times that they responded even when she tried to resist.