Besides the question about whether she even has ABS...

If she locked up her brakes, I would be surprised if the car slid straight. More often the car starts rotating as the rear tires slide sideways. That's sure to be memorable if it's the first time it happened to her.

What about the brakes being wet? Wet pads & rotors from road spray, if she hadn't used her brakes for a while before this. Imagine brakes on a bicycle during the rain...

 

Yeah Porsche PCCBs and a couple of other brake systems actually lightly brake intermittently during wet weather to wipe the disks clean...very cool stuff.

When I got in an accident last winter when a guy in a Taurus cut across my lane 20 feet infront of me while I was doing 30 in 3 inches of snow I had to use full panic braking and the car started rotating like a mother...I was sliding right towards a telephone pole so I pulled the handbrake and rotated the car all the way around and only ended up nailing an Explorer and crumpling my left front fender. I was shocked how much the car rotated even though I was carrying no load.