Well, it doesn't have to be long-term angst! Or even really sharp angst, but more the achy kind. Bittersweet? Yeah, that. Because this would be them being a basket of puppies and rainbows and absolutely perfect together on paper, and damn good in execution, but with that little niggling doubt that they're settling, even if it's settling for a million dollars and a basket of chocolate. And worseish because they both know WHO they also want, and probably know who the other one also wants.

Also, Mary giving Marshall shit about lawmen and nurses and the horrible divorce rates (that she'll have to look up) and being vaguely transparent... Ouch.

Mary and McCoy, while temporarily nuclear hot, would be like cats in a bag. Wet ones. Surrounded by Rotweilers.

Also, CRAP. McCoy walking by Chapel and Marshall making out in his truck behind her clinic! And being Crabby. But let's talk more about the out-making.