"Not again" thought Shana, as yet another "client" claimed to be shocked by the discovery of her penis, and to express that shock with his fists. Usually the girls who worked Shana's corner warned each other about these assholes, but this one was from out of town, in for a convention he claimed. Maybe this would be the end, Shana knew that not many girls lived to retire. Ordinarily, she loved what estrogen had done to her body, but she could sure use the muscles she had had pre-transition now.
Then, as her assailant paused to shift his blows from her kidney to her face, she felt time slow down and a voice within her say "How'd you like to be a bio-girl? The body you get won't be human, but you might like it anyway. But no take-backs." A picture of a wolf-woman flashed in her mind.
Human, Shana thought. What have humans ever done for me? Yes, she responded.
The assailant paused as Shana's body exploded in hair as dark as her skin. What the hell? The trembling victim, the subject of one of the righteous beatings he handed out on a regular basis, was now a wiry, tough-looking wolf-girl. Was this some sort of horror movie?
Shana leapt at her attacker, and her new strength drove him to the ground. Shana's new toothy jaw closed around his throat.
The wolfgirl paused. Did she want to acquire a taste for human flesh? Did she want to kill? But did she want this creep to go on to hurt other girls? (Shana didn't know that every trans woman in the world had been offered the same deal she had been.) Her newly sensitive nose was telling her the man had emptied his bowels and bladder. "Take, take my wallet." he was saying.
The hell with it--it wasn't worth a murder beef, and Shana had no illusions of the kind of justice a black trans woman could expect in the courts.
She rolled the man over and took his wallet, with about fifty bucks and a nice selection of credit cards. She also grabbed his phone. She squatted over the man, and pissed on him.
"If you go to the cops, or report these cards stolen, I will hunt you down no matter where you are. I have your ID and phone contacts and you know how dogs can track. And if I ever, ever hear of you hurting another girl I will find you, and I will not show mercy. Do you understand?"
"Ye, yes" said Roger P. Thomas, with an address in Minneapolis and, judging by the photos, a wife and two kids.
"Now wait for a half an hour after I leave before you go."
Shana looked in the motel room's mirror to adjust her new hair. When she saw the wolf girl looking back, she realized that the greatest change hadn't been acquiring a fully female biology or even switching species--it had been the change from prey to predator.