Simple premise: A student lusts after his young history professor and finds himself wondering how she would look with different clothes, larger tits, etc. To his surprise his wishes come true, and he finds that he holds total control over her body and its function. Knowing this, it is time to have a little fun after class each night. The dominate would most likely leave his teacher deal with any changes he inflicted the night before until the next night, when she'd be taken advantage of again and possibly changed further. After a few nights of this, she no longer resembles her former self and is not quite suited to her old job.
Very little if any mind control please, she will resist and need a strong dominant to use his powers forcefully. Otherwise, anything not in my never list can be used against her.