Make her cum on command. not for her pleasure, but for your pleasure. Offer her no say in the matter. If she begs…deny her. If she she begs you to stop, make her cum repeatedly.
Teach her that she is for your pleasure, and she will begin to see your pleasure and hers as synonymous…despite not knowing what that word means…and then she will begin to only gain pleasure from yours. This will bind her to you, body and soul.