If there are people at the wedding who you know don’t get along well with others then let us know. We wouldn’t want to be the spark that caused an argument because we suggested someone stand next to their mortal enemy for a posed portrait.
Thankfully we’ve never experienced any bad moments at any of the weddings we’ve been at. Even when we’ve been told that some people would definitely cause a scene. Weddings, after all, are days for joy, aren’t they?