@PAPALOTAPUSS,
I repeat; why are you giving a **** about this?
People who hit you will do it again.
And what will come of this? Seriously. If she's lying to her pal, then what does that say about her as a person, that for some bizarre reason she feels the need to lie about such things? Does she go around telling her pal what YOU are like in bed?
In the absolute best-case scenario, you have an abusive overly chatty TMI girlfriend who has no boundaries and no inner editor.