Hello again. Sorry for the delay, I am sporadically online on the weekends. I am not an expert in body language as I feel it is more pseudoscience than actual science, so I will opt out and allow another expert to help you. Good luck.
Hi there, I'm Jeremy. I'm a clinical social worker. non-verbals are not my expertise but I would venture to say that the ones you describe are more related to anxiety she may be experiencing. Anxiety can for sure drive odd body movements.
Long and short, from my point of view, she is likely experiencing anxiety due to the tenderness of the situation.