After a conversation with Bledcolors, I have concluded;

gracemoreland:

Cute: a girl in a band t-shirt and socks that is far too big

Cuter: the same girl in the same clothes but her belly is hanging out below the shirt, you can see the belly outline, and her fat thighs keep rolling the socks down

CUTEST: When that cute girl walks towards you, with a shirt too small that it exposes her hanging belly underneath and you swell up with tension.