They say Friday the 13th is unlucky, but I’ve never found that to be the case.
Two years ago, on a different Friday the 13th, is when I found Melanie. Of course, Melanie was Mateo back then, and he-yes, he-was working in a car parts factory. Can you imagine? That delicate little body covered in grease and setting out engine blocks! It was preposterous and a waste of a gorgeous creature. 
I had grown tired of previous sissy, Brittany, and was looking for a replacement. Mateo was perfect. With the right treatment-hormones, and castration, primarily-he’d be a beautiful girl. So, I swooped in like a hawk and asked to take him out for drinks. I pretended to be interested in hiring him as a consultant. 
After he was drunk, we went back to my house and I showed him around. All the while, I was carefully studying him, taking note of his mannerisms. There was nothing particularly feminine about how he carried himself, but I’d been doing this long enough to know that could be fixed. I gave Mateo more drinks, and he passed out on my sofa. He woke up in his new bedroom, with bars on the windows and locks on the door. That is where he has remained for the two years. 
Of course, he resisted the changes. They always do. And thank God! Because that’s part of the thrill! If I changed a willing man into my feminine creation, what would be the point? That’s why I kept Mateo gagged for his first months in captivity. I needed to break him, to make him docile and eager to please. And I did. By the time his gag was removed, he took his hormone pills almost as if they were candy. A year later, when I had him castrated, he almost seemed relieved. That was also the day I blessed him with his new name and pronouns: Melanie. She/her.
These days, Melanie still has her little tantrums. Estrogen makes you emotional, after all. But she is well-trained. All I need to say is, “Melanie, assume the position!” and... ah, you see? Just like that, she’ll sit up on the bed with her ass out, awaiting either a spanking or for me to use her, as I see fit. 
But you are a good friend, and she satisfied me earlier today. Would you like to punish her? Be my guest. Just be gentle, please. If you break my favorite toy, you may have to replace her! You do have a fantastic bone structure...