Boy, no other advice then. She might be okay being ponied off of Cyn but neither Cyn or your hubby are experienced enough to give that a whirl I think.
I just have to get her past whatever mental block keeps her from wanting to go. someone on the ground urging her forward might help. I didn't have that before, I was alone... But yeah... she plants hard, she'll pull ya right off if you don't let go ;~D