Is she for real?!

Is she for real?! She really trusts this bitch AGAIN?! It's so abovious she is scheming something how confident and calm she looks. how can one easily agree to play a game your enemy made up?! -_-
I could kinda understand her 'trust' and pity for others till now bc If I imagin me in her place I would act similar (since I'm also kind of naive and believe ppl are good and have no other intentions first) but what she's doing now is just ridiculously stupid -_-
She didn't learn anything from the Professor.