Disclaimer: I do not own Gravity Falls.

WARNING: This story contains sexual intercourse between an adult and a minor. Explicit content.

This story does not mean that I accept adults-minors sexual or romantic relationships. I DO NOT AND NEVER WILL. This story is purely fictional and has to be treated as such.

No pairings.

Chapter 1: Wishes

He didn't know what to do.

"What will happen now?"

The man looked down at the girl who was watching him with fear in her eyes. Her sweater was torn apart and had several cuts in her legs, arms and two on her face, he knew he looked like a mess as well.

Ford couldn't have imagined things would end up like this. The pair only went to a near town to watch a concert from a group the girl was crazy about. He took her, his brother was helping with the source of their income and his grandnephew was way too young to accompany his sister.

He didn't expect, however, to the car to malfunction, he didn't expect, for them to have to walk through an unknown forest.

He didn't expect to encounter those hideous creatures.

Pueritia anguis he had called them when one was in Gravity Falls' forest a long time ago. Now, he knew where did it came from.

That forest was full of them. They were red snakes that unexpectedly would show hidden claws and attack you.

If there were only a few of them, those creatures wouldn't be a problem to deal with, but when they were walking, they were completely surrounded by them and suddenly they attacked her.

These serpents only attacked and devour one group of people.

They would attack men and women who were still virgins.

How did they identify this? He never knew, but that was the reason they would always attack the children while most of the grown-ups would be immune to them.

He had his gun with him, so he could save her in that moment, but the weapon was now in the hands (or claws?) of those creatures. They started to attack him when he was carrying the girl in his arms, trying to, somehow, hide her from them.

He was told to not be paranoid, he thought he wouldn't encounter more creatures in other towns.

He was wrong.

He explained to the girl in his side the nature of those creatures. They hated to feel trapped, that's why they would never enter the cave they were.

Both he and she reached the end of the cave, to see if they could continue their way from there. But that wasn't possible.

Ford thought about digging a way in the ground, but that would take days, and they didn't have many provisions with them, not to mention, those creatures tend to put their eggs on the ground.

So, what to do?

Ford barely walked seven steps out of the cave with the girl in his arms at night and they started to go after them again, making them to go back.

Those creatures would sleep and wake up when they smelled her. The only thing they could do was to find a way for them to not detect her.

But how? Their only option would be…

But that was not going to happen.

He researched the people that say they saw the creature in the forest. He discovered, the adults that were detected by the snakes were mostly homosexual women that didn't have any sort of… ejem, penetration. Apparently, for women to not be detected, both, an insertion and exchange of fluids were necessary. Some homosexual women, all homosexual men and all heterosexual people were always ignored by the creatures.

He reached the conclusion that the Pueritia anguis detected not one smell, but more specifically, the lack of two or more scents.

"Grunkle Ford, what will we do?" Mable asked, visibly terrified by the creatures that were eyeing the cave they were in.

He didn't have an answer for her.

What will they do? He didn't know. Well… he did know a way for them to stop attacking her.

But he refused.

"I don't know" he said while sitting down and looking at the ground. Mabel sat beside him, not knowing what else to do.

"We will get out of here, right?" she asked in a whisper. Not even she could look to the bright side of things in that particular situation. "But, I don't understand, why do they want me?"

Ford explained to her, the people they attacked, and the research he had done long time ago. Her reaction was to be expected.

"Oh" the 13 year-old was shaking a little "I see…"

She unconsciously backed away from him. Now he knew she had come to the same conclusion at him about what to do.

But both of them refused.

Ford borrowed her torn sweater to see if it called the attention of the creatures. But nothing happened, he put his coat around the girl and stepped with her outside, the creatures were easily attracted to her.

They couldn't make a plan involving their clothes.

They already knew a plan, but they didn't like it, they both ignored it while thinking of something new.

They could easily walk a whole day and get out of the forest, at least that's what they thought with the map they had for the town. But for that, they would need to make sure to follow the plan they already knew existed.

But none of them could.

Ford searched the forest and there were no close place for them to run to it without the girl being devoured by those snakes. Also, there was almost no fruits or even little animals for them to eat. The man looked from afar how two pueritia anguis were fighting over a rotten apple. It seemed that, in the lack of their favorite victims, they survived by eating plants, fruits and small animals.

Ford tried to grab a small fruit from a tree, but instantly, those creatures looked dangerously at him.

So, there was no food for Mabel and him to eat and no water. They really needed to get out of that place.

Getting a little desperate, Ford gave the girl some privacy, he walked away from her for a while to see if she having pleasure for her own, could change anything.

But that didn't make a difference.

"What now?" she asked, shaking and with a new big scratch on her face "Grunkle Ford?"

He didn't answer to her right away, the answer was right in the air.

"Do… do we need to…?" the girl looked at the ground with fear in her eyes and with a trembling voice. God, she was miserable.

"No" he answered automatically and putting his arms around the girl to try to give her some comfort "Don't worry, we'll get out of this."

Oh, how he wished that wasn't a lie.

However, they soon tried to get a plan similar to the one they tried to avoid.

Their eyes were closed all the time, while Mabel, who was sitting in the man's lap, was being touched by said person. There were some tears on the girl's eyes.

"I'm sorry" Ford would say every now and then "I'm truly sorry."

He had licked before one of his fingers in an attempt to simulate what was necessary for a woman to not being detected by those creatures.

But that didn't worked either.

After returning to the cave, again, and with more cuts on her legs the girl started to cry. She let herself fall in the ground and hide her face in her knees.

They knew what needed to happen.

And they hated it.

"We can think about other plan" Ford insisted, trying to comfort the girl somehow "We can…"

"Stop" the girl whispered between sobs "I know… there's no other way." Mabel looked at the man, breaking his heart. Her eyes were red and swollen, her hair started to get stuck on her cheeks because of her tears. Ford wiped said tears, not knowing what else to say.

She was right, and they wished she wasn't.

It was probably between 12 or 2 AM when they finally started said plan.

"Mabel" the man took her face between his hands, so the girl had her full attention on him " If you in any moment want to stop, or change your mind, just tell me. We still can..."

"I know there's no other way" she told him, eyeing the floor and making the man sigh. "Just…" the girl's eyes started to show some tears "Please, please take care of me."

Those words were enough to make the man's chest ache.

He hugged her tightly "I promise, I will take care of you as much as I can." He whispered to her, and she returned the hug.

The teen broke the contact, took a deep breath and closed her eyes, he could start now.

But how to start? He couldn't even think of a way to make things enjoyable for both of them. What could he do?

The man went closer to her and kissed her head gently. He then started to give small kisses in her cheeks and nose, never her lips.

That would make things worse.

The girl giggled, confusing him for a moment "It tickles" she mumbled, and he knew she was trying to light the mood.

The man smiled at this, admiring her courage, she was so young, so innocent, so good for this world…

She didn't deserve this, she didn't deserve to have this experience with him, no girl deserved to have it with a man they didn't want to be.

But it was the only thing they could do to keep heralive.

He continued to kiss her, closing his eyes and trying to imagine that he was kissing someone else, that he was about to make love to someone else.

He knew that the girl was trying to do the same.

"Try to think on someone else" he had told her before.

He left her face alone and went for her neck, making her shiver a little, but he continued, placing gently a hand in the back of her head.

The teen gave a small moan, he took it as a good sign to continue, but then, he heard sobs.

"Mabel?" he stopped kissing her and saw tears rolling down her cheeks "I'm sorry" he hugged her and the girl returned the hug "Let's stop now…"

"I…" the girl tried to talk between sobs "I shouldn't have…" she breathed deeply before continuing "I enjoyed that" she whispered, confusing and surprising the man "But I shouldn't have…"

"Mabel, don't say that" the man was caressing her hair while talking "This situation is terrible by itself, the least you can do…" he sighed "the least we can do it's try to enjoy what we can, so…" where his words good? "If you feel good with something, let me know, so I can continue to do it."

The girl nodded and looked at him. She had understand what he meant.

"Okay" she whispered. She then closed her eyes before gulping "You can continue."

"Are you sure?" he asked 'We can do it later, sweetheart"

"I want this to finish" she said, voice shaking "Please."

He couldn't argue with that, he also wanted to everything to end.

He broke the hug and started to kiss her neck again, making her shiver. She slowly leaned on the ground, and he was carefully on top of her. He tried to make her feel okay again, and he knew he accomplished it when he heard her moan a little.

He resumed of trying to think in someone else, trying to get aroused, because he had to, he needed to so they could leave that horrible cave for once.

But his age and their situation didn't help, he needed to concentrate, he needed to fantasize, to visualize a beautiful woman while focusing on what he was feeling.

"I'm going to touch your breasts" he said in a small whisper, asking for her permission while doing so. She only nodded.

He put a hand below her small blouse and felt how she tensed at the touch.

"Do you want me to stop?"

"No" the girl shook her head "I'm okay."

He then continued his way to the small breasts and gently caressed one of them. He felt her tense again and then relax to his touch. He continued to kiss her side of her neck and her shoulder while carefully touching one of her nipples. He heard the young teen gasp in surprise and then a small moan.

"That feels good" she whispered.

He took it as a cue to continue, trying too much to not think how small the breasts were, trying to ignore the fact that he was touching a teen.

After a moment, he successfully ignored those thoughts and he could feel an erection starting to grow. He then could feel how the girl's legs move a little, indicating him that she was also starting to get aroused.

The man put his other hand under her blouse and started to touch her other breast, making her gasp.

"It feels good" she whispered again, her eyes closed all the time.

He stopped kissing her, while continuing caressing her torso and breasts. "I will take off your skirt now, it's that okay?"

The girl gulped and look thoughtful for a moment before nodding, making him doubt.

"Are you sure?"

"Yes" the small teen kept her eyes closed "I'm sure."

He then, proceed to take her skirt and put it aside. She was now only wearing her blouse and her underwear.

"I'm going to touch you now" he whispered, and he received a small nod.

The man, kissed her neck again and touch with his fingers the girls pubis over her underwear, making her shiver again. He put his hand in the center of the girl's genitalia and caressed it. He could already felt the girl's arousal, her underwear was wet, and while trying to ignore the fact that it was a small girl's arousal, he could feel his erection grow more.

The man carefully put his hand under her panties and she tensed.

"We can stop now" he said to her " We don't need to do this…"

"I know that's a lie" she told him "I'm okay."

He sighed, before continuing to touch the girl. He could feel her labia, and he carefully searched for her clitoris. Having touched her a few hours ago, he found it without any difficulty and the teen moaned a little.

He continued to stroke it carefully, moving in a circular way so the girl could feel pleasure at his touch. He began to caress it slowly, and he kept increasing the velocity with the girl indications.

"A… a little faster" she said, her breath a little restless now.

He knew it was working and the girl was now aroused. He was now aroused, but… how will they handle this after finishing?

The girl gasped and tensed, he could feel his hands getting a little wet.

The girl reached an orgasm.

The girl was definitely physically prepared for the next step.

Mabel opened her eyes and looked at him. Her lip was trembling a little and he wished he could give her some sort of comfort.

"We can stop" he told her, caressing her hair "We don't need to continue."

The girl gave him a small sad smile "I know that's a lie…"

Not knowing what to do, he gave her a small kiss in her nose "I'm sorry, sweetheart."

The girl closed her eyes at the touch. "It's not your fault."

She kept her eyes closed and gave a deep breath, he could continue.

He unbuttoned his pants, and took them off along with his underwear. He then proceed to do the same with the girl.

"I'm going to remove your underwear" he told her, and she only nodded, her eyes tight shut.

Soon, the girl was only wearing her blouse, her legs were tight shut and she was trembling a little. He couldn't blame her.

She was so small, how can he make her feel good?

The man gently separated her legs and he could see the girl's genitalia.

Again, she was too small.

He took her and put her in a sitting position, she was leaning now in the cave's wall with her eyes closed all the time.

"I'm going to start" he whispered.

"It… it will hurt, right?" the girl's voice shook. And he could see how afraid she was.

"It will, at the beginning" he hoped only at the beginning. He didn't want to make this more difficult to her "Then it will go away."

The girl nodded, a few tears escaped from her eyes and he tenderly wiped them with his fingers.

"We can stop."

"Please, Grunkle Ford." The girl talked in a small whisper "Don't lie to me" she took a deep breath before speaking again "You can start."

The man stroke himself a couple of times before placing himself between the girl's legs, the girl was almost sitting in his lap now. He then, took his erected penis and put it in her entrance before, slowly, entering her.

Mabel let out a small yell as she put her arms around the man's torso and scratched his back a bit. He didn't complain, in a way, he deserved it.

"Wait a moment" she pleaded "I need a moment"

The man nodded and hugged her, caressing her lower back, hoping that would help her.

She let a small "I'm okay" and he, as carefully as he could, almost completely put his penis inside her.

"Wait again" she whispered "Please."

"Alright."

They stayed silent for a moment, while the teen to get used to the weird feeling.

"I… I think I'm okay" she mumbled.

Ford waited a little more to starting to move, just to be sure.

He began. Out, in, out, in. He was very slow, and the girl only remained quiet, while adjusting to the sensation.

He closed his eyes, trying to hard not to think that niece was currently the one he was having sex with. He repeated the same movement for a while, when she spoke.

"You can go a little faster." She said "I'm okay now."

He listened to her, and moved faster. The girl gasped a little and tightened the hug, was that a good sign or a bad sign? He couldn't tell now.

He suddenly, heard her gasp again "That felt good…" She whispered "…too… good…"

He understood. He kept moving at the same pace to make her feel pleasure.

He would be a liar if he said he didn't feel pleasure as well.

She was now completely sitting in the man's lap, her legs were almost around him. He was slowly increasing the pace.

Soon, the man was moving as fast as he could without hurting the small girl, and she was moaning every now and then.

"I feel…" the teen couldn't talk properly "I…ah…"

He knew what that meant, and he was thankful, because he was almost done too.

The girl gasped loudly and he could felt her tense. She had reached her limit.

He, soon, did it too.

He released inside her, making her gasp again and tighten the hold she had in him.

Their breathing was restless and their minds were slowly returning to reality.

They weren't with other people.

He was a grown up man, she was a girl.

They had sex so she could get out of the forest safely.

He, carefully, took out his penis and the girl sat in front of him, her legs crossed all the time. She started to shake and a few tears in her eyes were threatening to fall.

Ford dressed completely, put in front of Mabel the rest of her clothes, and, with little courage, he kneeled in front of her and wiped away her tears.

"I'm sorry, sweetheart" he mumbled miserably.

The girl didn't say a thing.

He didn't know if he had to say something else to her or remain quiet. He didn't know if he should hug her and comfort her or leave her alone for a while.

He turned his back to her and hide his face in his hands.

What did he just do?

He was mentally and physically exhausted, should they sleep a few hours and then go out on the morning?

After a moment, when he was able to look back and saw his niece, fully clothed now, curled into a ball and in deep sleep, he told himself that was the best idea.

He took his coat and put it on the girl's body. The night was cold, and the pure teen was only wearing a blouse and a skirt, he didn't want her to get a cold.

He gently kissed her head and went the other side of the small cave, to try to get some rest.

When he woke up in the morning after a restless sleep, he panicked when he didn't saw his niece with him.

"Mabel?' he called, a little desperate "Mabel, where are you?"

"I'm here." The girl had been in a deeper part of the cave.

"What were you doing?" he asked to her, with relief in his voice.

She looked down with embarrassment and handed the man the small bag she had.

"I… cleaned myself" she told him "We're out of toilet paper."

Oh, of course.

Ford cleared his throat, before speaking "Well, we need to get going now, sweetheart."

The girl nodded and they got out of the cave.

They walked freely. The creatures were watching them and surrounding them, but they weren't being attacked.

Mabel was safe now, and that gave Ford a little comfort.

Soon, he noticed that his niece was walking a little slowly, "Mabel, are you okay?"

"Huh? Yeah, just…" Mabel bit her lip, and a few tears were threatening to fall from her eyes "It's nothing."

"Sweetheart, please, tell me what's wrong." The man just wanted her to bring her some comfort, after last night, what else he could do?

The girl sighed, before answering "M-my… eh…it hurts… a little." She mumbled.

Ford mentally cursed himself for not thinking about this possibility.

"It's okay" he told her, before picking her up, surprising her "I'll just carry you for a while."

"I can walk" she insisted "It's not that bad." But when Ford raised an eyebrow at her, she sighed "Okay, it's really uncomfortable."

He carried her, and continued walking. Soon, the girl was having difficulty with keeping her eyes open

"You can sleep a little." Ford told her "It's a long way anyway."

Mabell only closed her eyes after his words and drifted to sleep.

That night, they were able to find a small motel. Perfect to spend the night and then take a taxi to Gravity Falls.

They entered the small room. Two beds were in there and a small bathroom.

"I'll take a shower." Mabel said, while walking there.

Ford, after the girl had closed the bathroom's door, called home with the small motel phone.

"Hello?"

"Stanley, it's me."

"Ford? Where are you two? You were supposed to get here yesterday! Dipper is worried sick, is Mabel fine?"

"She is okay" Ford answered, even though he wasn't so sure about that "The car malfunctioned, we had to walk to get to a small motel."

"Where is it? I'll look for you in Soos truck tomorrow."

Ford gave his brother the motel address, before Stanley's comment made him freeze.

"You sound weird, is everything okay?"

What could he tell him? Was he going to tell him what happened? Would Mabel and he die with the secret? Was she going to tell her brother?

Was he ever going to be able to see his niece's face without feeling remorse?

"Everything is okay" he answered for the moment.

He exchanged a few more words with Stanley before he hung the phone and hid his face in his hands.

The bathroom door opened, and Mabel was now heading to the empty bed.

"Grunkle Ford?" the girl could tell he was having a bad time "Are you okay?"

The man only looked at his hands, not answering right away.

"I'm sorry I couldn't do anything more for you." He told her.

The girl hugged her knees at that comment "Grunkle Ford, we wouldn't have… done that unless it was our only option, right?"

Ford stared at her, shocked. The girl was refusing to meet his gaze, did she think he…?

"Sweetheart, please, look at me" Mabel slowly did as told "Sweetheart, I would have never, never, lay a hand on you if we weren't in that situation." He told her firmly. She only nodded in response. "Are you…?" he didn't even want to think about it "Are you afraid of me?"

The girl shook her head "No, I'm not." Her lower lip trembled "But…" tears began to spill from her eyes "I want to feel comfortable around you, like before and… I can't…"

Mabel hugged her knees and hid her face in them before starting to whimper.

Ford, slowly went closer to her and pull her into a hug, surprising her at first, but then she got used to his arms.

"Believe me, my girl, I want to look at you the same way as before."

The girl started to sob while silent tears rolled down the man's face. He stroke her hair, comforting both of them with the action.

"She's alive, she wouldn't be if it wasn't for that, she is safe…"

The man's thoughts were interrupted when his niece talked.

"I'm not… I'm not a good girl anymore, am I?"

Ford froze at the girl's words.

"Sweetheart, what happened wasn't your fault" he said, in a gentle tone "You are a good girl and you will always be important and precious, not matter what, do you understand?"

He felt the girl nod and he sighed in relief.

They fell asleep, hoping to feel better in the morning.