*INCOMING FINAL FANTASY X SPOILERS*

Uh...Was the marriage ceremony even concluded? If it was still on the go when and after Tidus and the rest of the party came to defend Yuna, it would kind of feel like a shotgun wedding of some...Weird sort. Plus, Yuna had dived off the tower, and escaped with the help of her Aeon.

Maybe in very extreme legal cases, or something, they would be married, as to increase Spira's trust in Yevon, and in turn, Yevon's hold on Spira. So for all we know, the titles of husband and wife could just be false. Especially since Yevon seemed to like twisting things and bending/breaking their own rules.

...This is very trivial...Haha. =|