I agree with all the comments. First of all you are the boss and she works for you (though not very well from what you have said). You call the shots and in this case you have several reasons to stop. You said you feel stronger and have met your goals. Also you have already decided to stop. She has invalidated you before and is now doing so by not respecting you wish to stop. That is not professional or therapeutic. In fact, the whole set of interactions sound kinda terrible. I wouldn't want to have a therapist play games with me. Life is hard enough without having to have extra mind trips laid on you by someone you try to get assistance from.