Ask and ye shall receive lmao. Anyways this whole wedding shenaniganery takes place like 2 years after the finale. Dean DID get cas outta the empty but he is bad at words so instead of saying anything TO cas he just kinda. Avoided him until he couldn’t stand it anymore and then kissed him. And then fucked him. Dean assumes that cas will be able to interpret this as “I love you but don’t know how to say it”. Cas does NOT interpret it like this. Cas basically thinks that dean is giving him a pity fuck, but doesn’t turn it down because he has massive massive issues and tells himself he is content with whatever scraps of affection dean will give him. This interpretation is reinforced when dean isn’t affectionate outside of sex because he has Issues (internalized homophobia and several complexes about intimacy). Eventually cas is like dean we can’t do this anymore, this meaning their perceived fuck buddy arrangement. But to DEAN they aren’t fuck buddies, they’re dating and in love. So dean takes this. Poorly. And they end up having ANOTHER divorce.

Anyways in this mamma Mia but slightly to the left au dean is Donna, obviously. He is bending over backwards trying to give Sam the perfect wedding because he deserves it, dammit!!! He may not like the idea of a big white wedding but by god sammys wedding is gonna be the best goddamn wedding these stupid motherfuckers have ever SEEN. Sam is Sophie, but instead of inviting three potential dads, he’s inviting cas. Cas is, of course, pierce brosnan.

Some key facts:

-nobody actually KNOWS that dean and cas used to fuck. Dean was way too repressed about it. All anyone knows is that they were extremely close, and then they weren’t. Sam has like. An inkling. But that’s all.

-u know how Sophie is trying to hide her three potential dads from Donna for like half the movie?? Sam is doing that with cas. Everyone else knows cas is there but Sam thinks that if dean finds out he will, quote, “flip his shit”. So he’s just stashing cas in increasingly weird places until dean spots him.

-in this au dean is Donna, which means he retired from hunting and decided to buy a big, old, condemned house and turn it into a bed and breakfast. The house is in idk. Georgia?? Wyoming?? Either way dean found it while he was on a hunt. It was extremely haunted, he un-haunted it, and then impulse bought it for a couple grand.

-it’s a nice house. An extremely nice house. It’s so nice that Sam is having his reception there. The ceremony is at a church in town. I haven’t decided if Sam is catholic or a Unitarian, but either way there is a church, and he is getting married in it.

-the reason dean is planning most of the wedding instead of Sam is because Sam is a bridezilla and needs everything to be perfect, but has no idea WHAT perfect looks like. So every time sam tries to plan the wedding he ends up spending six days looking at napkins. Dean, being a self-sacrificial big brother, basically takes on all the planning duties.

-Eileen does not give a fuck. She’ll marry Sam in a fancy ball gown, she’ll go down to the courthouse, she’ll happily spend the rest of her life living in sin with him if that’s what Sam wants. Eileen is hashtag woke and thinks that marriage is nothing more than paperwork and a couple of tax benefits wrapped in false narratives about romance. She is, of course, extremely right about this.

-rowena tries to upstage Eileen at the wedding because she has winchester derangement syndrome and is acting how we all think Crowley would act at the deancas wedding. It does not work because Eileen is a girlboss.

AnYways dean finds out cas is at the wedding thee NIGHT before and predictably flips his shit. The day of the wedding there’s a winner takes it all type convo right before they head into the church where they’re like *this* close to communicating enough to understand what’s going on between them BUT BEFORE THEY DO, dean storms off.

The church scene plays out EXACTLY like it does in mamma mia. Dean and cas have it out in front of the whole fuckin wedding party. Cas finally realizes that dean thought they were dating the whole time, dean finally realizes that cas DIDNT. During this absolutely insane shouting match it is very clear that they are both still hung up on one another and very much in love. Sam is like actually Eileen I DONT want to get married yet!! I was just doing this because even though it’s been a decade, I still feel like I have to be normal. Only I don’t want to be normal!! I want us to hunt together and live together and maybe one day I want to elope to fuckin. Idk. The Bahamas or some shit.

Meanwhile the poor officiant is like. So... y’all aren’t getting married?? And Sam is like no, sorry. It’s a shame tho bc we spent all this money... and then cas is like wait. Dean. Dean. I know we only just figured out our shit, but I love you. I never stopped. We should get married. And dean is like yeah ok. There’s always divorce right?? And then they get married and go back to deans house and throw the party of the century.