So I changed the story line because I didn't like my idea before so. Let's see how this one goes

Y/n's POV

It's been 4 years since it all happened. Eren somehow managed to escape and now he's at Marley. Now we have to grab him and bring him back. Now I have to leave my kids to save you We're all undercover in Marley. I hope I don't run into Reiner that would be bad. I'm sitting next to Eren in the hospital. Im pretending to be an injured soldier.

"You idiot I could be with my kids right now. But I have to play pretend while you get your petty revenge" I whisper in his ear. He ignores me. He invites a young boy to sit down.

"You both seem to be recovering well"  the boy says

"Well neither of us are suffering from psychological trauma. We're only pretending so we don't have to go home" Eren says.

Im gonna kill you when we get home

"Did you come from warrior training?" Eren asks

"Yes I did, although I don't think I'll inherit any of the nine titans" The boy says. Eren has a look of relief on his face.

"There is another candidate that I don't want to become a warrior, I will probably die without accomplishing anything meaningful" The boy says

"Everyone has to step into hell, whether it's because we're forced by outside forces, or others forcing themselves. Those who force themselves likely see something beyond the hell they are placed in, but they won't know what it is, if they don't continue down that path" Eren says.

"What's your name?" I ask

"I'm Falco. What about you guys?" Falco asks

"Eren Kruger, Y/n Kruger" Eren says.

"Are you related?" Falco asks.

"Married" I say softly.
(THERE IS NO INCEST I PROMISE, IT'S JUST FOR THEIR COVER STORY THINGY MA BOB)

Kill me

"Oh I see." Falco says.

"Could you deliver this letter for me outside the Liberio internment zone. If it's delivered from inside the internment zone, it will be searched.. and then they'll know we're faking our trauma" Eren asks

"Sure who's it for?" Falco asks

"It's for my family, I want them to know I'm safe" Eren says.

When did he become such a good liar?

"Oh ok!" Falco says as he grabs the letter and runs away.

~1 Month Later~

"Eren my babies are at home. Please hurry this up I want to go see them" I whisper in his ear. Falco comes over.

"Thank you for delivering my letters for the past month" Eren says. Falco looks over to the baseball and mitt that's next to Eren.

"Is that a gift from your family?" Falco asks.

"We'll be returning home after the festival" Eren says. A man walks up to us and Falco takes his leave.

"Hello my name is Dr. Jaeger" The man says.

Don't tell me we're related. What is he? Our grandpa? Pft as if

"Do you know about Falco's family? The boy's uncle had ties with the Eldian Restorationists. To save their family's reputation. Colt and Falco agreed to train as warriors. Please stop sending that boy on errands, if the Grice family falls under suspicion of treasonous actions again, they'll all be killed. You should return to your family with no regrets." Dr. Jaeger says

"Do you have your own regrets?" Eren asks

"I do hold many regrets over the fates of my son and daughter. I was responsible for their fates" Dr. Jaeger says. He then starts screaming and doctors escort him away. Eren begins tossing the baseball upwards. Eren then gets up and leads me to a basement.

"What are we doing here? Are you gonna kill me?" I ask sarcastically

"I might if you keep complaining" he says.

~Time Skip~

"Eren we've been here since yesterday. Why are we even here? I wanna go home. I wanna see my kids Eren" I say sadly. I then hear a knock on the door.

"Who's here?" I ask

"Just... an old friend" Eren says. The door opens.

"Eren I did not agree to this" I say.

"Too bad" Eren says.

"Mr and Mrs. Kruger? I didn't know you were bringing your wife." Falco says.

Please don't say that. Ugh I wish I was dead. Blegh

"Yes I did" Eren says. Thanks to the bandages, I'm unrecognizable

"Reiner its been 4 years since we've all seen eachother" Eren says. Reiner doesn't respond.

"It's good to see you made it to your hometown" Eren says.

I'm gonna kill him

"Can we leave? I really want to see 'our' kids Eren" I say.

"You guys are friends right?" Falco asks

"Is there really no avoiding this?" I ask

"Thank you for bringing him here Falco. We all have catching up to do" Eren says

"Reiner, it's been a while" I say.

"Sit down Reiner" Eren says. Reiner hesitates.

"You can hear the stage very well from here" Eren says. Eren then shows Falco and Reiner his hand.

"What's on your hand?" I ask.

"Y/n... please" Eren says. I take off my bandages.

"No I will not please! I could be at home, cooking dinner and watching my kids. But I'm stuck here babysitting you" I say angrily. Reiner's eyes widen.

"You're alive...?" Reiner asks

"Surprise" I say with jazz hands but my face is blank.

"Does that mean you got my letter?" He asks

"Yes I did get your letter, it was very sweet Reiner. But that's not important right now. From your reaction I can assume Eren has cut himself and now a lot of people are going to die. Eren is starting a war none of us want to fight." I say.

"Wait I thought you were old friends?" Falco asks

"We are..." I say. Falco realizes we're from Paradis Island.

"Y-You tricked me" Falco says.

"Sorry" Eren says.

"No you're not sorry Eren" I say. Eren ignores me.

"Those letters you sent. Were for my friends" Eren says.

"Right now is our best chance to retrieve the Founding Titan" Falco says

"I wouldn't try it." I say with tears in my eyes.

"Why are you crying?" Falco asks

"I don't want to die.." I say.

"You'll be fine" Eren says

"I'm not like you Eren. I get that I have regenerative abilities. But I can't turn into a titan. If you transform you'll probably kill me" I say shakily.

"Quit your whining, or do I have to remind you.." He says.

"Shut up" I say.

"Aren't you married?" Falco asks

"No that's my twin sister.." Eren says

"We can retrieve the Founding Titan right now" Falco says

"No Falco" Reiner says

"I am the bad guy, however we all thought you were bad guys too" Eren says.

"Stop talking" I say.

"When you breached Wall Maria, we watched our mother get eaten by a titan. Right before our eyes" Eren says

"Eren..."

"You killed so many of our friends and comrades... and you're the reason that Y/n is responsible for so many deaths..." Eren says. Tears stream down my face.

"I didn't kill them.." I say shakily

"But you did. You were the top of the class, but because you decided to be stupid, you got pregnant. You couldn't help us. You got to live so comfortably while we all fought and many lost their lives" Eren says.

"Why....do you say those things?" I ask

"To make sure you know your place. Your scum. You had the traitor's baby. Therefore you are worthless" Eren says. Falco and Reiner just stare with wide eyes. I curl up into a ball.

"What do you mean traitor's baby?" Falco asks

"Why don't you tell them Y/n?" Eren asks. I don't respond.

"I'm not gonna ask again or do I have to remind y-" Eren begins

"I'll say it. Reiner... when I got really sick... it was because I was pregnant... with your kids" I say still huddled in a ball.

"See that wasn't so hard. Now Reiner why did you destroy the wall?" Eren asks

"It was to infiltrate the walls by taking advantage of the chaos. We wanted to see what the King of the Walls would do next, and then we would retake the founder to save the world" Reiner says

"Are you still going to make us die the most excruciating death possible?" Reiner asks

"No, after crossing the ocean and living with the enemy, just like you did. I realize that there are good and bad people here just like at home. We're all the same. You were just raised by ignorant adults who said we were demons and the enemies of everyone. I don't blame you, you were only a child" Eren says

"No you're wrong. I accept the responsibility for forcing Bertholdt and Annie to continue the mission after Marcel died. I wanted to be respected and seen as a hero. I accept I am wrong. Please kill me. I can't stand living anymore. I was the one who killed your mother" Reiner says. I hear Eren stand up and I get up as well. He holds out his wounded hand to Reiner.

"We're the same Reiner. We were born this way. We will both go moving forward until the enemies are destroyed." Eren says as he begins his transformation

Crap.
(1555 Words)