OK, here comes the thing

I saw this illusion and surprised, and you will be as well when you see how brain works.

Question does she turn clockwise or counter clockwise?

Clockwise right. But this is just a 2D image, so there is no exact turning direction. Hold on a second it was not the catch.

Now check how the shadow at the bottom rotates. And concentrate for an anti movement. Voila you obtained a new motion which is on anti direction to what you first perceived.

Brain can structurally construct both types of the images.

Don’t be sure if you see it with your bare eyes.