<Why does everybody think that Susan won't make to the altar with George? <Think of it from a plot POV. George having kids...uh, I guess there's some others stuff>
She won't make it to the altar unless the show ends this season. The producers won't allow a quality television show to remain above average for long, its simply the way life works.
"If its any consolation, Apu, I've found that life is one crushing defeat after another until you just wish Flanders was dead. Homer Simpson