What is she doing?

The excruciating pain of her tensing thighs makes your eyes cross. You don't know what to do other than pray it ends before you have to tap. But then unbearable pressure ends, not fully, but you can breath again at least.

But then you feel fingers on your thighs, slowly approaching your crotch. A finger slithers its way past whatever protection your costume may have provided, and warm waves of pleasure rise from your pussy as the waves of pain from your head end.

You've got to do something or... or... oh fuck that's good.