In an ideal world, all families live happily ever after. In reality? Our lives resemble Modern Family. The world needs an etiquette guide for this modern wedding. What happens if you want your step father to walk you down the aisle? Do you need to include your step sister as a bridesmaid? What happens if you have two Mother of the Brides? Like with most things etiquette wise, the key is to not offend anyone and to include everyone you can in the celebration. This can take on any number of forms.