Prompt: I... really like the au where Irvin adopts Armin (Levi has Mikasa and Hanji has Eren), so could you write a fic where daddy Irvin meets Armin's boyfriend Jean?
A/N: Armin kept his family name despite being adopted.
There came a time in every parent's life when their child grew up – it was an inevitable occurrence that Irvin had prepared himself for when he had adopted his charge, Armin, when he was five years old. Still, he hadn't expected the day to come so soon. Sure, it had been twelve years since then, but now that the moment was here it felt like it was just yesterday when he had just been teaching Armin how to ride a bike and now—now this.
Just last week, Armin had come up to him and said "I want you to meet my boyfriend," if Irvin weren't such a composed man, he might have spit his coffee out. Instead, he swallowed the drink – the bitter drink going down like molasses – the shock of Armin's announcement making it hard to swallow.
"Could you repeat that please?" because surely he had heard wrong, but then Armin repeated himself.
"I want you to meet my boyfriend,"
And then Irvin died a little inside.
It wasn't that he was shocked Armin was dating a boy – he respected his preferences – no, he was shocked that he was dating in general! Armin had never mentioned a boy before.
"How long have you two been dating?" Irvin dared to ask. Since Armin had never mentioned anyone before, a small part of him hoped they had just started dating and that Armin wanted approval right away, but then the petite blond answered with "Half a year".
And Irvin was officially dead.
They had planned for the boyfriend; Jean was his name, to come over Friday afternoon for them to meet. Well today was the day and Irvin had been on edge the entirety of work and so he rushed home the moment his shift ended and now he was walking into his house.
He hung up his coat, before slipping his shoes off in the entry way. Normally, Armin would come to greet him at the door and the fact that he hadn't made him frown – he must be busy with Jean.
The first thing he noticed as he made his way down the hallway was that all of the lights were off and the second was voices coming from the living room.
"Mm Jean – we can't. My dad—aah… My dad's going to be home soon."
Irvin slowly set his briefcase on the floor, a string of discomfort coiling in the pit of his stomach as he stopped to listen because surely, surely – he had misheard.
"Don't worry, we won't go all the way this time. I'll be real quick."
This time? This time?! Was this Jean implying that they had done that before?
"We really shouldn't… ah. Ah – so good."
There was no mistaking it – it was obvious what he was hearing. Irvin started storming down the hall – steps quick and light as he made his way to the living room.
"See? You want this just as much as I do."
This Jean guy was a bad influence – a sexual predator – a nuisance that needed to go.
"Let's… Can we at least go up to my room first?"
Irvin walked into the living room, and there was his precious baby boy, lying on the couch and on top of him was Jean, his right hand down the front of Armin's pants and-
"I can't wait that long – here's fine."
Oh. Hell. No.
"You have three seconds to remove your hand from the front of my son's pants before I remove it for you."
If Irvin wasn't so mad, it might have been funny how high Jean jumped, before he was scrambling off Armin – red faced and clearly embarrassed.
"Mr. Arlert—no! I mean, Mr. Smith!" Jean yelped - eyes racing rapidly as he tried to think up an excuse for what Armin's dad had clearly just seen.
And when he failed to come up with an excuse he fumbled to introduce himself, "Nice to meet you sir," and then he was sticking his hand – his right hand – out, "I'm Jean Kirschstein… sir."
Irvin sneered, clearly staring at the boy in disgust before Armin was nudging Jean in the elbow and whispering, "You seriously didn't just—Go wash your hands."
And that explained why Irvin looked so disgusted – Jean quickly lowered his hand – blushing even more if it was possible – before he was darting past Irvin and slipping down the hall.
With Jean out of the room, Irvin quickly rounded on Armin.
"I do not approve of this boy one bit."
"I'm sorry," Armin apologized, "And I know it seems bad now, but I promise Jean's normally better than this."
Irvin hardly looked impressed and so Armin excused himself to make tea, before dipping down the hall in search of Jean.
From where Irvin had sat himself on the loveseat, far away from the couch, he could hear the two boys whispering. Jean a flurry of panicked "I messed up,"s and "He's going to kill me."s
"It's okay Jean," came Armin's soothing voice, "First impressions are always bad."
"But I really messed up. How can he forgive me? I can't even forgive me!"
"You're being too hard on yourself."
Irvin scoffed, he disagreed. It was good if this guy felt awful for what he did.
"Look Jean, I know things didn't go as well as they should have, and my dad probably thinks you're a giant pervert,"
You got that right.
"But I love you. I really, really do. And my dad can respect that. As long as he knows you'd never hurt me,"
"—I'd never hurt you!" Jean cut in and Irvin could hear Armin laugh lightly before continuing.
"I know that. And once my dad knows that too and sees how happy I am with you, he'll accept you too."
There was a beat of silence before, "Yeah?"
"Yup." Came Armin's chipper reply, followed by a sigh of relief on Jean's part and a "I love you Armin."
"I love you too Jean," and Irvin could hear the joy and happiness dripping off his son's every word.
Irvin waited patiently for the duo to return, Armin with a tray of drinks – coffee for Irvin, which he took gratefully – and Jean looking a lot less frazzled than he had earlier.
Jean bowed at the waist, "I'm truly sorry sir, about what you saw. It'll never happen again."
Irvin could see Armin beaming at the boy and when he caught his son's eye it was obvious Armin knew he had heard the earlier conversation and knew that Irvin would begrudgingly approve. But that didn't mean he was going to let Jean off easy. For Jean's sake, he hoped Armin had warned him that Irvin would be drilling him every question in the book.