First of all, turn the laptop off. You don't need the laptop to work if you want to get the data off of it. I mean hell, it's a hard drive. Slave that bad boy and you'll get the data off at your leisure.
If you leave it on while the coffee goodness gets into the drive, she'll be screwed permanently. Tell her to turn the damn thing off, take the damn hard drive out, and who gives a holy hell if the laptop boots or not.
This'll also give her an opportunity to try to mop up as much of the coffee is possible, and maybe even save the laptop.
Or you could keep the laptop on and wring your hands until it passes the point of no return. That'll work.