My name is Marie. I'm 23 years old and I live in Québec(Canada). My first language is french so you'll probably see a lot of mistakes everytime I write sonething but our love for books is international right ?!
That line made senses in the movie because R.Z. was at least a LITTLE chubby. But in the book, she's around 124 pounds and while I know that everyone has different body type and everything, I don't really see how she could really be ''fat''.