Navigation for a Lightbox within a Lightbox

Hi all! I am using lightboxes to add context to multiple choice questions so that when users click the "context" button, it leads them to a lightbox. I have that working correctly. (See screenshot 1)

I am trying to send a lightbox to a slide that has its own lightbox (see screenshot 2), and I notice that when I'm on the second lightbox (see screenshot 3), whenever I click the X, it goes back to the first slide (screenshot 1) and not the middle lightbox slide. 

Has anyone had this issue? If so, what would you recommend? 

Thanks in advance!

 

Screenshot 1

Screenshot 2

 

Screenshot 3