what she says: i’m fine
what she means: All we need for Credence is the real Graves. He is out there somewhere, and he is the one who would actually give Credence love and affection. They need to find each other, for their own good. Bleached-sock-Grindelwald can do whatever, but only the real Graves matters now. We can all see how attached Credence was to Graves, how much he needed the love. He even leaned in more when he hugged him. He needs it.