Okay, almost three-quarters of the way through the episode! Home stretch! (ABC: if I tell you where I buried the gold, will you stop the pain?)
Susan and Karl sit down on some charred chairs outside Susan's scorched house. Susan, doing a credible impression of a grown woman, tells Karl that she knows why he bought her the house, and she isn't going to get back together with him -- not now, not ever. She calmly delivers the blow that she plans on marrying Mike, and she presents him with divorce papers. For a second, it looks like manic Karl is going to laugh the whole thing off, but then his jokey-jokey starts to crack. He asks her whether Mike "popped the question," and she proudly tells him that he hasn't, but that she plans to do the honors herself tomorrow night. Karl looks at her (and maybe I'm reading more into Richard Burgi's expression here than there really is, but), he looks both proud and surprised, like maybe the Susan he knew back when they were married would have never been capable of such a self-assured and independent move as a Sadie Hawkins proposal: "This is a lot to ask for a man who still loves you, Susie." Aw. Susan very nicely pats him on the back and tells him she understands, and yet if he loves her, he needs to set her free. He takes a deep breath and signs the divorce papers, "joking" that "if it doesn't work out, [she knows] where to find [him]."