Hi Pilus
Some ideas for you …
Writing is important. It will make her relive it (and give you delightful insights) and she should explain her feelings about it. If she did not like it she should tell you (and no punishment for that).
I see you stared some Behavior Modification. Maybe you should give her simple asigments that she can do during her busy day or part of it Like… she is not to cross her legs, or use certain words like *No* or *At All*, maybe wear particular piece of dress ore jewelry just for you. Those things should not be done every day, IMO. Of course she should take note of her infractions and report them.
Did you try choices game? *Taste yourself or stand in the corner for five minutes?*… maybe use a game of chance that will determine what kind of play it will be and how it will go on. Let her throw the dice without knowing what will happen
Is she willing to play with herself for you? If not it very worth working on… powerful means of humiliation and orgasm control,
Have her buy ordinary items herself (like ginger roots or cucumbers or clothespins or rope or locks ….) then use them… or have her use them herself. Basic bondage? Rope g string?
All the best and have fun
Wolffie