I think they're sisters.
If Laura starts asking for her own book -- oh, noooooooooooooo.
Never type the phrase "her own book." Because then your brain will perk up and say, "Her own book? Oh, I know what that would be about!" Just as you're writing your lj entry. And it will present you with other characters. Because it is such an obliging brain.
Maybe we can bargain down to a short story.
Stupid, stupid, stupid brain.