If the car is sufficiently going slow, I don't think there's any ill effects if the brakes are applied while in a turn. I've been doing that with the Ford Contour/Mondeo for 14 years and it still have the original discs.

I've also traveled mountain roads and had to do quick slow downs from 75 mph in a curving turn because a lumbering 18-wheeler suddenly came up ahead. No ill effects.