Jason Aaron 
Once Upon a Time at the End of the World #9 [PDF ebook] 

What Maceo felt for Mezzy turns to terror as he doubts if he ever knew her in the first place, and even begins to fear the woman he once loved. The chasm between them grows-quite literally-as Golgonooza’s foundation crumbles and bubbles with a strange poison gas and makes their communication even more alien as they’re presented with a tragic choice that should hurt more than it does