I'm also an NC instructor and I have to ask, is there a compelling reason that she can't wait until after the birth to get a CHP? Is there any reason NOT to be safe rather than sorry later?
While it may be just fine to shoot while pregnant is it worth the risk of finding out down the line that if you had just waited your child would have been fine?
Having to shoot in a real self defense situation is one thing, but to shoot just to qualify is totally different.
I'd say wait the few months. Is the child's health worth the risk? Will the friend NOT give her the class later?