if you physically pose or engage in activity which you believe may be degrading or humiliating to her while at the same time verbally praising or teasing/tempting her in that strong Dom tone.. you can potentially create quite a tantalizing dilemma for your sub..hearing the soothing and seductive praise of her Master may hopefully keep her attention and focus while getting in the physical degradation/humiliation..

I also agree with the take it gradual approach.. I'm a firm believer in slow and steady wins the race.