RORY: I will be assisting, I will be helping out those less fortunate than myself, I will be getting college credit and this is the end of this particular conversation.
LORELAI: You’re right. It’s a good thing. Nice, keeps your halo shiny.
As becomes increasingly clear during this episode, Rory is volunteering purely for college credit, and doesn’t really care about the less fortunate. She’s not quite as angelic as Lorelai thinks.