[Emily begins to slowly eat the rest of her meal]
LORELAI: That’ll do, pig. That’ll do. [takes a sip of wine]
A reference to the movie Babe, previously discussed.
In the film, a grateful misty-eyed Farmer Hoggett says this line to the pig Babe after he has, against all odds, won a sheepdog trial, despite not being a dog. One of the most understated last lines in film history, it’s a dignified, restrained way for Lorelai to say Emily is doing very well indeed.
The Annotated Gilmore Girls 