The Delivery #2

After a year under the control of the sadistic Mistress, Nikki needs to break free. With a knock at the door, she follows the courier to find out she is not the only slave wearing a collar. Mistress controls her too. Nikki is entrapped and gets acquainted with the other slave, Cobie. Through bondage scenarios and games, both girls agree to the conditions set by Mistress in the hope to have their collars removed finally. But will it work?