It's not so much that Chloe's resistant to Maria. It's more like she's resistant to everything that isn't just her own whimsical nature. It's in her programming to be suspicious of everything, even a good deal that would work out well for her, for the simple reason that she's not the one who came up with it. Chloe's tricky business, I think Maria has her hands full trying to keep her snared in any sort of trap, mentally or emotionally~