How close are you and baby when cosleeping?
She also doesn't seem to like to comfort nurse or fall asleep at the breast, neither did her sister. Isis would even go so far as to reject the breast when she was hurt or upset, I think Hera might be the same way. I always read about moms who can calm a hurt or upset child by nursing. Kinda wish I could do that too, it seems like a fairy tale!