SHERRY: I’m lying in a bed. God knows what’s gonna happen … And she goes back to work. I would love to go back to work, but I can’t because I have to stay here … She’s not here. None of my friends are here. Christopher isn’t here. No one is here. No one but you. Thank God you’re here, Rory. I don’t think that I could do this by myself because this wasn’t supposed to happen until next week. I wrote it down. I wrote it down. I wrote it down!
Sherry is frightened and worried at being left alone to give birth, and seizes on Rory as the one person who can help, in the most inappropriate way possible. Rory is barely eighteen and still at school, with minimal practical skills of any sort, having travelled alone by public transport in midwinter at night for more than four hours! Yet somehow she is now the designated assistant to Sherry.
For someone who was so gung-ho to have kids, Sherry’s suddenly got very cold feet on the idea, and says she would prefer to be at work. (Yes, at night. Everyone works at night, apparently).
The Annotated Gilmore Girls 