Like all my fairy tale retellings (at least long form) it doesn't end with the wedding. But following the folk tales, this is not because the wedding takes place mid-action but because there is one sequence before the wedding, and one after. (Or sometimes none before, and one after.)
But it's still a novel, and it still has to rise to the end. (With enough local decline to seem realistic, of course.) Such as the hero and the heroine both knowing at the wedding that they marry even though there's a real problem hanging over their heads.
I think I should write it first and worry about it after.