Never watched the show but I googled her and the problem isn’t that she’s a fatty. It’s that her face shape is so round, so people see more fat than if there.
I’m probably a good 50 pounds heavier but my family has obscenely high cheekbones so even as a fatty I have those hollows in my cheeks that people assume is thin. It’s not the weight there, it’s bone structure.
This is how I accidentally named one guy “ThisGuy” and the other, “Thatguy.”
On the plus side, Jim Bob the bridge builder is a long term friend I keep looking up when we visit town.