LORELAI: Okay, well, um, the … Max and I have been serious for quite a while now, and he asked me to marry him, and I said yes. I’m getting married.
EMILY: Well, I think that’s very nice. I certainly hope we’ll be in town for it, but if not I promise we’ll send a nice gift. Now excuse me, I’m going to check on the roast.
Emily is very hurt that Lorelai has waited this long to tell her that she is engaged, literally leaving her to last. Rather than tell Lorelai how she feels and have a discussion about it, Emily disguises her hurt by behaving as if Lorelai’s engagement means nothing to her, shocking and upsetting her daughter in the process.
Lorelai says that she and Max have been serious for “quite a while”, although in fact they only started dating after their January break up about six weeks ago, and their engagement only happened because the alternative was to break up – Lorelai’s original preferred option.
The Annotated Gilmore Girls 