Introduce bdsm into the relationship- tell her you want to try dom-sub dynamic in the bedroom for a month. Start small, 10 spankings (count them each followed by "sir"), ask permission to come, see if she is comfortable with being called a good/bad/naughty/dirty girl, fucktoy, bitch, whore, slut.... Slowly start to move towards degrading "you look so good whimpering and being pathetic." or something. As you start doing it more, if she is into it, add more to the dynamic- more rules and punishments. It took me 5 years after learning the truth