At the eleventh hour, Christopher arrives at the hospital, after being out of town for some mysterious reason, in an area where he couldn’t get cell phone reception for some mysterious reason. Where was he, the middle of the woods? Maybe cell phone coverage was a lot more patchy in the US during the early 2000s?
It is a relief for Rory and Lorelai to see him, because otherwise it would have been them going in with Sherry to watch the birth. It seems almost superhuman of Lorelai to offer to accompany Sherry into the delivery room, when she doesn’t like Sherry, and resents her for being the reason things didn’t work out between she and Christopher.
But as Lorelai told Emily – she wasn’t going to do it for Sherry, but for Rory. Luckily, she never has to do it, but it must bring Rory comfort to know her mother was ready to be there for her is she wanted her.