My god, that is just a mini cyclone of DARVOing. "You thought you were being nice but you offended me, then you were stupid enough to try commiserating with me, then you got upset when I confronted you about it, I had to comfort you, and that upset ME ME ME ME ME..."
What a Narcissistic fucking cunt.
I wonder if her IBS is bad enough that she's experiencing malabsorption issues. Or maybe her poorly-controlled diabetes is kicking into overdrive, and metformin isn't enough to keep it at bay. Of course, there's always the possibility of an as-yet-diagnosed cancer, given that she's a deathfat.
Whatever it is, it's not intentional; she has too much at stake to risk by losing a significant amount of weight, and she lives with Juliana, who would be triggered if Coco ate noticeably less.