I’d put her in and you begin moving her feet in natural motion and legs too. You can’t feel any swelling or extra amount of heat in her feet and legs like she has inflammation going on? Just saying she may need physical therapy. Are you giving B complex for muscle health? Try putting enough water in the tub that supports her body but where she can stand if she wants to having her body supported by the warm water. If you can get her moving slowly she might regain use of her legs and feet.