You can tell where her priorities are when she's mad that Kirisame showed up, instead of being relieved that Kuchinashi survived with his help. I honestly think miss "disciple" would be happy if Kuchinashi died because then her being with Kirisame wouldn't be a problem anymore, since apparently that's the most important thing going on here.
Not the murders, not protecting Kuchinashi, just her own ego and patting herself on the back.
It had to take Kuchinashi herself telling her to let it slide before she'd even consider thanking him.