@Deranged PhoolI have (mostly in my head, but with some scraps written somewhere around) a longish narrative that may or not fit. A story that's somewhat personal.
I will try to condense as close to the main point as I can manage:
Some five to ten years after they exchanged last (long and handwritten) letters, and another two they separated from over a year lasting relationship where he was her self-appointed older brother but not without simmering lust that may or not have been given way in a one singular occasion only, Eve, a messed up girl with history of abuse and prostitution invite John, a subtly messed up totally over-the top larger than life highly functional autistic prodigy political activist who nevertheless haven't done anything useful with his life since high school, to her full 3-day traditional wedding with with Edgar, a heir to a family gained quick wealth, now owning large construction business, but with (ex-?) ties into organized crime, and as it turns out, John's classmate and friend in elementary school where John suffered from extreme bullying and physical abuse by peers to the point he had to change schools (from the small prestigious "Leon Juniper Advanced Math Academy for Gifted Children" to a large public no-name "City's 3rd High School" with was, in fact, much better), as her... well, the invitation never gave the details.
Eve never knew her dad, and for reasons obvious to John her mother isn't invited to the wedding either. He's still totally ambushed with her wanting him to take her down the aisle in the church... announced upon arrival at said church. Well, back then when he was a senior and she a junior (with four concurrent lovers, three of them adults), he may or not saved her from committing suicide. He can, in fact, construct a claim and a right, so that's okay. But it doesn't end at that, Eve and Aileen, the hired events organizer John has some tangled history with as well, envision him a Witcher, a makeshift pagan priest to lead the midnight belt-bonding ritual, the *true* wedding for those people; church is just a public show. He could, truly, if he had prepared for it, some people do believe he's gifted in more ways than math (he himself don't believe in magic he may or not wield -- or so he claims, publicly). So, he has to improvise.
Alchohol flow by the river, many guests retire early, and naked dancing after the sauna somehow leads to him bending the bride over and declaring he will fuck the last infidelity out of her, before connecting the newlyweds physically and literally, with his own hand. The remaining party may or not detoriate in all out orgy at that point, but John wake up next morning in embrace with Aileen. They don't have much time to cuddle, organizatoric responsibilities they have taken upon haven't yet ended.
Eve and Edgar live happily ever after. John say nothing about his own life afterwards, just that he's checked on them, but refused to become godfather to their child... that may or not be his.
P.S. Yea, as stated above or how I would tell it, if I did, its got seven tons of cultural background and all nine circles of hell that follow from it. The amount of non-trivial research even I should do to tell it a way it gives justice to the setting, well, that's one of things that intimate me, and the hardest part about it would be to refrain from telling thousand years of history of a world that may as well be alien to the likely audience.
But if you see elements that can be adopted or borrowed, feel free, I'm not worried in the slightest anyone could steal the dragon in my head it is, and even if -- more power to them, lol.
P.P.S. A word about Soviet Latvian triple weddings: in USSR churches didn't have rights to register marriage; visiting them was allowed but discouraged, including by forcing pastors to be in close relationship with KGB.
So it was an open secret your church confessions could end up in a report. Christianity itself was brought by crusaders in thirteen century, but the peasants were never truly converted. So the wedding convoy would first go to the municipality to sign the legal license, then the church, then go to the feast, where eventually, typically at midnight, the wedding would be finalized in simple ceremony that's usually very abbreviated, since nobody knows the songs or anything anymore. But it's a great illustration of the shell game we lived here with, for way too long. Private and public persona of the same individual can hold different beliefs and act on different agendas... The timeline of the story, it's a bit after, John graduated high school in 1995, the wedding itself could be anytime 2002-2008, so it seemingly doesn't matter anymore, any of three ways of signing the marriage could be the legal and only, yet, the shell game is still played, even without the masters.