1
Things had gotten boring between Mistress Erin and her pet, Lisa. They both knew it, though neither had said anything. Lisa had not said anything out of a combination of reverence for her mistress and the fact that she was gagged far more often than not. Erin had not said anything out of compassion for her pet and the hope that she would find a solution.
Erin believed that there are two kinds of pet: those who want submission and those who want permission. Those who desire submission want to fuck a football team because they were ordered to do so by someone far superior to them. Those who desire permission WANT to fuck the football team, but will not let themselves articulate or act on that desire. Therefore, they seek a master/mistress to force them to do what they already wanted.
Lisa was a true submissive. Even before she found Mistress Erin, she had gone further into exhibitionism, bondage, whipping, orgies and so many other things than anyone Erin had ever known. Lisa certainly needed no one's permission.
What Erin had taught her was control and self-denial. Over the course of a few years, Lisa had gone from needing an orgasm every few hours to being able to wait weeks and months for one. She could have gifted hands, mouths, and cocks all over her body and still wait for her mistress' permission to climax. Even when Mistress Erin had numbed her so she could get no pleasure from a crowd of people using and abusing her body, Lisa joyfully submitted to her Mistress' will.
As proud as Mistress Erin was of her work and her pet, she could not shake the feeling that she had reached bedrock. There was no deeper she could dig and no further she could go. Lisa wanted and needed more, but Erin had no idea how to give it to her.
2
Mistress Erin had never like comparing her pets to each other, as it was both unfair to their individuality and undermined the bond of trust in her relationship with them. But desperate times call for desperate measures.
Erin invented a former pet named Julie and praised her constantly to Lisa. She would look at Lisa's thin, hard body and talk about how much she loved Julie's fat, jiggly body. She would talk about how much she loved that Julie was a good girl who kept letting herself be turned into a whore.
Lisa hated hearing about Julie. She wanted to be Mistress Erin's perfect little pet, and she was beginning to feel like she would never be able to please her mistress.
Finally, Lisa broke down and wept at her mistress' feet. "Please, PLEASE help me be more like Julie!"
Mistress Erin patted her pet on the head and caressed her cheek. "Of course. Of course", she said softly and sweetly to her distraught pet, "I want you to be a good girl. I'll help you be a good girl. I'll make you a good girl."