Gina has never wanted to be friends with Hazel, so I feel her reaction to Charlie saying Hazel shouldn't be friends with her was totally exaggerated.

I am afraid Gina has brought about her own downfall.

Even knowing her to be false I still warmed towards her, I don't doubt she is not all bad.
Her glee at someone else's utter misery and her actions the other night have put me right off her.
Totally fallen from grace for me.