Degrade her. Call her a dirty little slut/whore/cunt/bitch. “The only thing you’re good for is to be fucked/satisfying me.” Make her degrade herself “What are you?” “What are you good for?” “You’re my slutty little whore. Say it.” If she hesitates, punish her with a slap/spank. “Not fast/quick enough. Let’s try again. (Repeat the question/your demand).” If you’re satisfied, “Good girl” or “That’s better.” If not satisfied, punish her until she gets it right. Make her call you “Sir” or “Master”. Punish her every time she forgets to refer to you as that.