Late for what, Avery? A deposition? A meeting in the judge's chambers? A managing partner's meeting?
Oh, heck, none of that, just your wedding! No big deal.
The writers can correct that with their priceless BIC pens. In fact, Sharon can be the maid of honor and Dylan can be the best man. Faith can remain the flower girl. The writers can reveal that Cassie is alive and is an ordained minister who can conduct the wedding.
Then Nick will get a miraculous brain transplant from both Bewitched and I Dream of Jeanie so that he can carry on an intellectual discussion with Avery, and they will disappear to to the Land of Oz and live happily ever after...