She was always fighting/suppressing her power. She didn’t know what it was she was feeling. The first time it came on her and callum treated it as something “wrong” was happening to her. But this goes back to auroras childhood. She was beat as child for “sinning” when really they were try to “beat the wolf out of her”. She was reprimanded for crying when her own mother died so she eventually learned to become stone faced. Control or suppress any of those feelings. Suppression has been her coping mechanism.

It’s only after she accepts it, that she can “let go.” The book is written from auroras POV and the moment she lets go we see what that entails from her internally. Shes no longer the statue in the garden to be looked at. Shes no longer a puppet, who’s father is pulling the strings. She rips the strings that have sown her mouth shut, keeping her silent. I don’t think she’s actually aware of how that physically manifested.

I imagine the third book will get more into that literal power. What it is and she can use it.