Final Presentation on the book

In our last class, we did a final presentation on our books.

My book was "Big Girl."
I picked up 2 key points after reading it.

First...
Throughout the story, she struggles with her weight and her love life.Even if she tries to lose weight, her weight continues to go up and down since
she likes to eat and depends on food to manage life.
But because of her appearance, her parents especially her father always teased her.
I think what the author wanted to say was that the main character just wanted to be loved and accepted.

Second...
The two sisters looked completely different and they were different in ages,
but they kept in touch for a long time even though they lived separately.
The main character didn't like her parents but she did like her sister very much.
I thought there is a strong relationship between the sisters.