Warnings: This chapter contains a short lemon at the end. It will stand where it starts and stops, but it will be the whole end of the chapter. It has no important things that you actually need to read so if you do not want to read the lemon, you are free to jump over it.
I do not own Shingeki no Kyojin and the son to Jean and Marco is an OC that I have come up with. He is not too much of a part of the story, I just figured that they'd have a kid if they had been married for this long and such.
Finally, I will say that there is going to be a lot of OOC-ness in this story, considering that everyone are over thirty and that especially Marco will be different because... yeah, you get that part.

I hope you enjoy the story. Constructive critisism is appreciated and hate will just annoy me and make me stall with chapters, if I get angry or hurt enough.

Prologue: He's back!

"Where is he?! I'm scared…" Jean sobbed, sitting on his couch with his friends. The thirty five year old male was going insane with worry. He gripped his head while Armin rubbed his back. "I'm sure he'll be back, Jean. Marco is stronger than he seems, you know that." Armin said and it somehow comforted Jean slightly. "I g-guess so…" he whispered and his voice was hoarse from crying. Even Eren was worried about Jean now, as well as he was worried about Marco.

The last one who saw Marco was Jean and that had been seven days earlier, during their anniversary. Marco had seemed happy, completely fine and no one had questioned them. When Jean and Marco had come home from their tenth year anniversary party, they had immediately went to their bedroom and continued to celebrate, happy that their son was in Armin and Annie's hands.

And when Jean woke up the next morning… Marco was gone. Completely missing and no one had seen him leave the apartment, even though there was a homeless man outside their apartment who hadn't moved all night and neither had seen the kind male who usually gave him twenty dollars for some food around the corner.

Jean sighed and rubbed his eyes tiredly. But then… it knocked on the door. Jean blinked. Who else could come over now? "It's probably the police. I'll open." Mikasa said in her gentle tone before she stood up and walked into the hall and down the stairs to the door. Jean sighed and leaned his head on Armin's shoulder. He needed Marco so badly right there and then. He was lost without his brunette best friend and husband. Marco had been Jean's crush ever since Jean was ten, when they first met.

And five years later they started dating. Not before they were twenty five, did they decide to get married, not wanting to be too young before they did that. And at twenty seven, they had adopted Andrew who was now ten himself and aware of the fact that he wasn't any of their biological kid. And all three of them had been happy until that day where Marco had disappeared.

"Y-you?" they heard Mikasa yell in astonishment. Jean blinked and slowly stood up. "Who is it?" he called and walked towards the stairs. He heard steps. Unfamiliar steps, but steps nonetheless. He got through the hall and stood at the top of the stairs and looked down and there he was. Jean's heart stopped and he slapped over his mouth scared, happy, sad, surprised and angry. Marco was smiling gently at him. "Honey… I'm home…?" he said and held his arms out hesitantly. Jean's face turned first into big, happy smile… then it morphed into an angry growl. "You idiotic son of a bitch, I thought you were dead!" he exclaimed angrily and backed away from Marco.

"I know, I'm sorry, babe." Marco said gently and walked towards Jean. "I'm gonna leave you two alone." Mikasa said and walked to the living room, closing the doors to it and immediately heard Jean starting to yell and growl angrily. He had been worried so it was understanding that he got like that.

"You were gone for a week! Your son didn't go to school because he wouldn't think of anything but the fact that his dad was missing." Jean said angrily and backed up against a wall. Marco still smiled gently and stood in front of him, grabbing his hands. "But I'm here now. I'm home, Jean." He said, smiling brightly. "Where were you?" Jean asked breathlessly because of the contact of those warm, big and slightly freckled hands.

"I will tell you later. Right now I really just want to say hi to you…" he murmured and buried his face in Jean's neck. Jean blushed and put his arms around the taller male's waist. "Your friends are in the living room, babe." He muttered, stroking the other one's back softly. "I'll give you a welcome home party in our bedroom tonight, just go and say hello to the other." Jean said and smiled, kissing his cheek and then pushing him towards the living room.

When they opened the doors and Andrew saw them, he ran crying over and hugged Marco who happily accepted the hug. Jean leaned against the door edge and stared at his family being happy again. "I missed you dad, why did you go away?" the kid muttered while crying and squeezing his dad. Marco lifted him up in his arms. "I had businesses to attend to that I'll tell your other dad about later. Let's just forget about that for now." He said and chuckled.

The night went on with talking, dancing and getting into a small routine again. After a few hours, the clock soon turning midnight, everyone was gone home and Andrew was in bed. Jean was cuddling up in a ball with Marco's arms around him and his legs in his lap. "Baby, I missed you…" Marco whispered in his ear and nibbled on it. Jean smiled. "I missed you too. You really had me worried, what did you do?" he asked and turned his head towards Marco, kissing his lips softly and shortly.

"It was a private work thing. You know how they are sometimes. I told you that when I started, it could happen that I suddenly disappeared." Marco whispered and continued to kiss Jean's ear. The blonde male sighed and nodded. "I know… I just still hoped that you would kind of tell me." He muttered and stroked Marco's thigh. Marco breathed down his neck. "I know you did. I'm really sorry." He muttered and kissed Jean's neck. Jean tried to ignore that it didn't feel like it used to feel.

START OF LEMON!

Jean rolled over and straddled his brunette husband, putting his arms around his neck. Marco put his arms around Jean's waist and Jean stared intensely into his eyes. Then Jean stroked his hand down the other male's chest and down to his stomach. He took Marco's shirt off without breaking eye contact more than for a second. Marco sighed and smiled softly when Jean kissed him deeply.

Marco opened Jean's pants and stroked his thighs. They panted slightly and quickly took Jean's shirt off too before the kissed deeply, licking around inside their mouths. Marco shivered and grabbed Jean's pants, tugging them down. Jean smiled and kissed him more while taking his husband's pants off too. They got off all of their clothes and Jean stroked his husbands crotch, making him fully hard. "I should prepare you…" Marco whispered while panting and kissing Jean's necked softly. Jean moaned low. "No, let's just do it. I don't want to wait." He said quickly.

Marco shivered and Jean smiled as he kissed Marco deeply and lowered himself on his crotch. He gritted his teeth as he felt himself getting slowly stretched. He buried his face in the brunette's neck and whined low while Marco had his hands on Jean's lower back, massaging him gently. "I'm sorry babe. I'll make it up to you…" he whispered with a smile and breathed heavily by the delicious pleasure. After a minute or two, Jean had Marco fully inside him and the blonde gripped the couch behind the freckled male's shoulders before he slowly lifted himself up and down. Marco moaned low and thrusted up.

Marco thrusted hard up while Jean moaned low and felt his prostate get hit over and over again after a while, they did their best to try and keep quiet to not wake Andrew, but still, some noises slipped out of their mouths.

END OF LEMON!

A/N: That was first chapter. I have no idea if this story will turn out good or not, but this is important for you to know: people will be ooc, especially Marco. I'll be delighted to read and/or answer comments, but just so you know, I have social anxiety so it could happen that I don't answer.