“Was Sherry with you?”

LORELAI: When I invited you to Rory’s debate, was Sherry with you?
CHRISTOPHER: Yeah, of course. She’s been with me the whole trip. Why?
LORELAI: It’s just that you gave me no indication that she was with you.

Lorelai is quite reasonably suspicious of Christopher’s motives and behaviour. He came into their lives six months ago, only telling them he had a girlfriend just before he left. Once again, he has weaselled his way into their lives without mentioning that Sherry was going to be with him.

Would Lorelai have invited him to Rory’s debate if she knew Sherry was coming too? Probably not. Christopher would no doubt say that justifies his lies of omission, so he can see Rory – although he only seems to want to see her so he can impress Sherry with what a great father he is.