To enslave you

You both were watching tv on evening when all of the sudden your girlfriend turned to you and said. Do you remember that you promised me that you would be willing to try what ever I desire? Of course you remembered your promise but you were confused that she all of the sudden started bringing it up. You turned to her, yes of course I remember why are you asking? I think I am ready to come back to your promise and give in my desire. Was here answer, ok the what is your desire? I want to enslave, make you submit to me and make you my very own slave. To use how ever I want. At first you thought she was joking she always was a very shy person who rarely took the lead in anything especially in bed but when you looked at her her face was straight without the hint of this being a joke. So you asked, ok and how are you imagining this what kind of slave would I be and what kind of mistress do you want to be?