I just realized that around the end of the chapter, C whispered something to D. Maybe that's it wahahaha. Yahwi
Somehow, I already thought it's Dylan when he hugged Corey and didn't even moved even when he's getting kicked. Corey even made a face as if she realised it. That's why I think she called him when she kicked the phone. Well, that's just what I understood from the last few scenes in the chapter.
Wait! What?! So it's Dylan and not Damian? Or there is also Dylan aside from Damian? Sorry I was confused...