Have you ever tried riding her on the outside rein only? Not saying itís necessary, it would just be interesting to see how she responds. She sounds like she would like that. Just get her on a circle, establish the bend, move your outside hand slightly closer to the center of her neck but donít cross the middle line and release the contact with the inside rein.
(I am amazed at our collective ability to imagine and get invested in horses weíve never laid our eyes on. I am itching to try this technique with this particular horse on the other side of the world. Silly.)
I have not tried that before, but knowing her, I'm certain she would do one of two things: turn in the direction of the outside rein (she will roll back to the outside to change directions readily even if she's close to the fence, it's something I've taught her before to keep her thinking instead of running), or evade the pressure completely/tense up from confusion and just leave the circle. There is
the possibility that she'll interpret it as neck reining toward the inside, since the outside rein would probably push against her neck being so close to the center, but I think her aversion to direct contact will override her cue response like it usually does.
If she feels the direct outside rein and inside leg, she will probably translate that as "turn to the outside" since if I'm not asking her to bend, I mostly use legs to ask her to turn. Plus, the outside rein is a non-traditional way of asking for a bend that she doesn't know; she is only familiar with one rein paired with the same side leg. But there's also a good chance she'll get upset or confused at my hand pulling from close to the center and just think I'm pulling back in general (especially in a bitless bridle), which could definitely make her upset. She doesn't do anything dangerous or stupid when she gets upset, she just gets stiff in the neck and more forward and blows through cues.
It's unfortunately something I can't try right now because of the mud in the center of the arena I mentioned in the previous post that currently prevents me from doing circles. It's also something I'm not keen on encouraging, because she already enjoys looking toward the outside at the scenery she wishes she could be exploring instead of the arena!
Before I figured out she doesn't like to bend to the inside at the trot during mud season because she doesn't want me to pull her into the slippery center, I would ask her for an inside bend and she would just parade around the perimeter of the mud with her head and neck entirely rigid, completely ignoring contact. At first I was like, hellooo, are you listening?? But then I realized I
was the dummy because I should have been listening to her very understandable concerns in the first place. Duh.
"Mom, I'm keeping both of us safe from slipping in the mud and hurting ourselves. Hellooo, are you listening?? Guess not. Fine, I won't listen either, but I'm still keeping our butts from falling in the dirt." What do they say, a gelding does what you ask but a mare takes care of you, or something like that? She teaches me so much more than every other horse I've ridden in the past 10+ years combined.