Fuck your feelings, nancypants
I'm guessing she has adopted a completley new bullshit "personality" around her mom. As you said, part of that is surely a misrepresentation of her actual eating habits.
I bet the thumb is so confused and messed up right now that she just lummoxs down into the basement and drinks away the bad feelings while watching cartoons.
It's so remarkable, these two. Both stupid, with zero intellectual curiosity, terrible fashion taste, eating habits, hygiene, speaking or critical thinking skills, and the only way either of them could make real money would be whoring themselves out.
What's the phrase? Oh, yes: "oposites attract". They must, because there's sure as hell no attraction between these two unless you count Becky's attraction to Big Al's money or Big Al's attraction to having a butler who will also wipe her ass.