#1) So Marley neither stepped on a scale nor noticed that only the costumes didn't fit, while her regular clothes fit the same.
Seriously — is someone telling the writers to be stupid?
#2) While I don't like "mean Sue," I understand her. Finn provoked her.
Sometimes I wish I lived on TV — there's a coworker of my hubby — I WISH I could "go all mean Sue" on him...
I'd never act on that wish, because I don't live on TV, but I understand the current mean Sue.