LORELAI: Hey Mom. You didn’t make it back to the room last night. Did you get lucky?
EMILY: Could you be any cruder?
LORELAI: Yeah, I can be cruder. Hey mom, did you get la- …
Lorelai chooses to take her mother literally and demonstrate that she can indeed be cruder, by beginning to say, “Did you get laid?”. This confirms that Emily and Richard did make up their fight and spent the night in the same room.