Separation

A/N: Welcome everyone! This is my first Gravity Falls fic, so let's see how I'll do. I guess I should add some background info for this fic.

AU: So in this universe, the Earth is more populated than now. Parents can only give birth to two kids at once. If you have triplets, you have to give away one. You can have 3 kids in your house, they just can't be triplets or too close in age. This rule became looser by the time Mabel and Dipper get to Gravity Falls.

Other AU: As you can see, there is an OC. So pretty much Mabel and Dipper have another sibling named Tyler. They're triplets. Because of the AU above, they had to be separated. Tyler joins the group at some point, changing the stories of Gravity Falls, making this an AU.

Enough with info, time for the story!

13 Years Ago…

Mark and Anna were happy to hear the news that they were having a child. Most parents would be joyous. They were even happier when they found out they were having twins! Having twins was so rare these days.

"I can't believe it Mark! Twins! We get to have the maximum amount!" Anna had said when they found out the news. They were at the hospital.

"I know Anna, but we have to let the doctors finish. They haven't done a full check yet." Mark replied. Anna gave a look of understanding. She knew what would happen if she happened to give birth to triplets. She couldn't bare to see that happen.

"I hope it's just twins. I don't want my baby to be taken away!" Anna said, pain in her voice. Mark saddened slightly. He didn't want that to happen either.

"If it weren't for that damn rule…" Mark started. He noticed that sad look on his loving wife's face and decided to change the subject slightly. "Population has really grown in the last few decades. Can you believe we are approaching 10 billion?"

"I know. Just think, only 30 years ago, we were only at 7.5 billion." Anna said. They were both baffled by how the population has grown. People have really moved on. The couple heard some footsteps coming from the hall behind the brown hospital door. Anna noticed that they sounded a little too rushed, like the doctor coming had bad news.

The brown door burst open. The doctor had a pained look on their face. She hesitated to say anything. She hated this part of the job. It had happened to her, so she knows how it feels.

"Mark, Anna. I am so sorry, but, you're having triplets." The doctor said. Anna broke into sobs.

5 Months Later…

Anna sat at the kitchen table. She had already gone on maternity leave from her job. She hated it. She knew what would happen. There was nothing she could do.

She heard the garage door go up, and then she saw her husband come in. He looked so exhausted.

"Long day?" She asked, hoping to lighten the mood.

"Yeah. The boss is just giving everyone hell. I wish I could go on parental leave, but they don't do that anymore." Mark replied.

"I just wish it could've stayed twins." Anna said, visibly saddened. She moved around the spoon in her coffee.

"Well, we are going to have to be honest with the two we have." Mark said. He looked away.

"Mark!" Anna said, infuriated. She knew one would be gone, but hoe could her husband say something like that? "Don't talk like that!"

"I'm sorry, but you know it's true!" Mark retorted.

"I don't care! I don't want to know about that!" Anna shouted.

"How can you not care? It's our children!" Mark yelled. Anna hesitated.

"I do care! I just don't want to dwell on how one of them will be taken away!" Anna said.

"Anna-" Mark started, but was cut off by Anna.

"I will, we will have triplets! One of them will be taken away and put in an orphanage! Or worse, brainwashed and turned into a mindless drone like all of the not as smart ones! The ones with defects! The ones that are different! I will live with the knowledge that my baby is gone!" Anna shouted. She broke into sobs. Mark didn't know what to say, so he left the room.

3 Months Later (The day the triplets are born)…

"Don't worry! We are almost there!" Mark said. He was very worried. Anna said the four words that make husbands and wives worry. 'The babies are coming!' She had yelled. They had been driving for about fifteen minutes. At the speed Mark was driving, it should take about 5 more minutes to get to the hospital.

"I'm not worrying!" Anna said. She slapped her face with her hand. "What am I saying? Of course I'm worrying!"

Mark could see the hospital. They parked by the ER. He and Anna burst inside. The nurses took Anna. Mark followed behind.

Once Anna started to go through childbirth, Mark went out of the room. It had been about 16 hours since he was in there. The children were born about an hour ago. He went inside the white room. There was three little blankets on Anna's bed, each with a little bundle of joy. It was already decided which of the triplets would go.

The names were already chosen, well except for the boy. All of the babies looked the same, a true mark of triplets. There was Mabel on the far left, and the boy right next to her. Tyler was on the right, away from the two. She was going to be taken away.

"They are wonderful." Anna said, hours later. They had about an hour or two before they took Tyler away. They decided to spend the most time with Tyler. They wished this would make up for the future, but it couldn't.

"Tyler is going to be brave. She has to." Anna said. She stroked the top of Tyler's hair. She was the only one of the triplets that didn't cry when she came out. She actually came out quiet. She as independent, that's for sure. Three hours after she was born, she took off her oxygen mask. Anna and Mark tried to make some form of memories with Tyler. They knew she would be gone before they could make any memories that lasted.

Two Hours Later…

The agents walked into the room. Anna held Tyler tight. The agents came closer, arms out, wanting to have the baby.

"Leave her! Please just leave her!" Anna begged. The agents had took her baby. She was left with just two bundles of joy. She cried for hours. When she stopped, she and Mark had to think. Will they tell the twins that they had another sibling, or lie to them? They chose the latter.

12 Years Later…

"Come on kids!" Anna yelled upstairs.

"We don't want to go!" Mabel and Dipper said simultaneously. That got creepy from time to time. Sometimes Anna wondered what it would have been like if Tyler was there.

'No, I will not dwell on those thoughts.' Anna thought to herself. She forced herself to walk up the stairs. Ever since she told the kids they were going to Gravity Falls for the summer, they've been like this.

"I said, come on kids!" Anna yelled again, into Mabel and Dipper's shared room. Sometimes she thought it was weird that they shared a room. It would be better if they were the same gender. Oh well, they get along great so what's the harm? They only have 3 bedrooms in the house anyway.

"No!" Mabel shouted.

"Please Mom!" Dipper shouted right after. Anna sighed heavily. This was going to take a while. She grabbed the kids' arms like they were two.

"C'mon you guys! You are acting like two year olds!" Anna yelled. Mabel and Dipper instantly stopped resisting. They finally got outside after what seemed like hours. Mark put Mabel's brightly, sticker-covered bags into the car. Then, he put Dipper's rather mundane bags. Well, at least compared to his sister's.

Dipper put his worn out star hat on.

'Dipper really needs a new hat. Maybe Stanford can give him one.' Anna thought. Anna climbed into the front seat of the car. Mark got into the driver's seat. Mabel and Dipper unenthusiastically got into the back seat. Anna made sure to not let Dipper bring any electronics.

Anna was actually considering just making Dipper go. Mabel wasn't on electronics that much. Anna knew that Dipper couldn't live without his other half, same went for Mabel. So she just made them go together. She didn't know that Mabel wouldn't like it as well.

Mark started the car, and it made the humming noise. They started their journey to the bus stop.

20 Minutes Later…

They had finally made it to the bus stop. Mabel and Dipper were quiet the whole ride. Anna looked back at the back seat a few times to make sure they were okay. They had sullen looks on their faces each time. Anna felt a little bad for doing this to them, but they needed fresh air.

The family climbed out of the car. Mark took the bags out of the trunk. Anna could see the bus coming from a distance.

"Oh kids! I'm going to miss you!" Anna said, as she pulled the three of them into a big hug.

"Mom!" Dipper said, obviously embarrassed. Anna didn't care, she wouldn't see them for nearly three months, she deserved this.

"We'll miss you too Mom!" Mabel said. She always liked hugs more than Dipper. Anna released them from the family hug. Mark was quiet, like he usually was. Ever since the trip-twins, birth.

"Make sure to put on sunscreen!" Anna yelled. She squirted some of her sunscreen and before her twins could protest, she put it on them.

"Mom we'll be fine!" Dipper said. His face was covered and sunscreen. Dipper was obviously annoyed by this, so he wiped it off. Mabel made faces in her sunscreen.

'Always the artistic one.' Anna thought. Her little Mabel was drawing before babies were supposed to even pick things up.

The bus finally pulled up. Anna felt tears come up. She promised herself she wouldn't cry, so she didn't.

"Goodbye! We love you!" Anna said. She was overjoyed and sad. She would miss them. She kissed them both on the forehead. Mark walked up to Mabel and Dipper and said something Anna couldn't hear. Mabel and Dipper started to smile. They boarded the bus and got on the back.

Anna and Mark waved as the bus drove off.

"I'm going to miss them." Anna said.

"Me too, but it's only for a few months. It not their whole live-" Mark said. He cut himself off when he realised the implications of what he said.

Mark and Anna were silent the whole car ride home.

This Moment at the Woods Miles Away From Gravity Falls…

I was panting. My long, dark braid was hitting my back multiple times, but I didn't care. How long had I been running? Who knew? These trees were just making it harder and harder to see. I couldn't run any longer. My chest started to hurt. I leaned on one of the pine trees in this big forest.

I could hear a faint voice. "Where is she?" It said. It was probably an echo. That means I'm far. I have to be careful. I don't want them finding me. I hated being there. Why was I even in that horrible place?

"Where is that girl? Tyler! Get your ass back here!" I heard the voice yell. It was louder. Only slightly, but I don't take chances. After a few more deep breaths, I ran more. I ran for at least ten minutes, then I stopped again. I listened as hard as I could, was the voice close?

These stupid woods. I may like the outside, but I can't take the noise. The birds chirping, the animals running amuck on the ground. It's making it hard to hear footsteps or the voice! I listened for a few minutes, but I couldn't hear anything.

'Good, they're gone. Now what am I going to do?' I think to myself. My own voice echoes in my head. I actually knew what I had to do, I had to make a fire.

Curse this damn forest! It must have rained last night. The sticks were all wet. I gathered the driest things I could. I found about 13 twigs and sticks, a few leaves, and some dry grass.

I took the backpack of my back. This had been planned. I had been planning my escape for months now. I pulled my lighter out. As I started it up, thoughts came into my mind.

'Things used to be so great, what happened?' I thought to myself. After a few times, a fire started going. I managed to find a huge stick that was mostly dry. This made the fire grow even larger and warm me. It was the best I could manage. I had to think of the future. I couldn't be in the woods forever.

"I think I'll sleep on it." I say to myself as I pull a folded blanket out of my backpack. I lay my head down and let the blanket fall over me.

A/N: Well, here's the prologue. Man, lots of timecuts. As the story goes on, there won't be as many. This actually took only two days to write. When I'm in ultra-writing mode, multiple chapters can be written within the hour.

Well, there's not much to say. I hope you like my fic so far!