LORELAI: Thank you for finally being on my side for something.
RORY: Mom, I’m always on your side.
A really harsh comment from Lorelai, who is obviously at a very low point, emotionally. Rory has almost Stockholm Syndrome levels of support for her mother – Lorelai has done some really terrible things to Rory (like kissing her teacher at work in front of other students, or letting her freak out over the fact they had termites), and received nothing but kindness and forgiveness in return.
The Annotated Gilmore Girls 