Did you know that I stole her crackers?
Are you serious? Why did you steal her crackers?
I was dying of hunger and I just couldn't resist.
It is hard to resist food when you are really hungry but it did not belong to you and it was wrong to take it. People feel really strongly about their food and it might make them angry enough that they don't want you around.
She wasn't using it and I'm hungry.
What if she was saving it for later because that's when she would be hungry and now you have stolen it, so she will suffer later? It's important to consider other people's feelings, and since the food isn't yours to begin with, you should not steal it. Maybe next time, ask her for a small piece and she might be willing to share.