Dude, that was the most EASILY discernible story I've ever seen in a professional wrestling ring that doesn't involve a David vs. Goliath angle.
Punk and Daniel Bryan wanted to win the championship, and AJ wanted them to fight over her. Daniel Bryan played into that desire, but Punk didn't. Sometime during the chairshots to Punk, AJ decided she didn't like them fighting over her anymore, and she started calling it down the middle. Then it turned into who can outlast who, and in the end it was Punk who could outlast Bryan.
I'm usually pretty hard on these guys (because that's not Slyfox has to be), and even I thought that was a pretty superb match.