I said - unintentionally!
I never thought you'd frighten or hurt her deliberately, otherwise you wouldn't be here and asking all those questions, or be so fond of her as you very obviously are...
It is simply the fact that fright or hurt is one of the main reasons for biting, sometimes it can go back to something before you even got her. My biting lady was a very dominant sow; so perhaps it is something in the character that she is standing her ground.
Have an eye out if there is a there certain way you hold her when she bites you?
I would rather like to help you to find a way to make both of you completely happy with each other!