One of Isabel's classmates notices her state and tries helping?

(this chapter originally by "c1ph4r")

As Isabel was busy panicking, unnoticed by Mindy or the instructor, one of the other participants had turned their heads when they noticed movement.

As Mindy was tossing Isabel's shorts and panties aside, Bethany watched with wide eyes. In shock, she took in Isabel's situation and also noticed that their instructor was actively encouraging Mindy to publicly strip and embarrass Isabel.

Bethany knew that she had to take action.