Benched and Boxed Bitch
The slave girl is prepared for sale by binding her securely doggie style to her shipping box. Head harnessed to prevent biting. Then her ass is lubricated and penetrated to stretch her out for the client. First using fingers, then using the glass rod. Then she is butt plugged and the plug secured with a crotch rope. The Master takes liberties with her mouth before boxing her up for shipment. She'll be grateful that he plugged her ass. It will make the clients cock go easier up her ass.