It was too late for Rayzel to avoid her punch as Kelly's movement was getting faster and faster each time. Rayzel could feel how hard the punch was but she just endured it.
She endured the pain for the sake of not letting Kelly think ahead of herself. That is the least that Rayzel wanted to happen, she doesn't want Kelly to see her as a weak woman.
Hence, Rayzel wanted to get even, since both women are challenged by each other. Kelly wasn't expecting the woman in front of her to avoid her attacks.
By just looking into her…Kelly thought she was some kind of a weak woman, considering how thin and demure she is. Kelly was now starting to expect that Rayzel could also fight…that she was good at it.
So this time around, Kelly is not complacent…looking at how furious the woman in front of her is…and at the same time,she could only feel the excitement running from her system at how fierce looking the woman was.