Chapter 1 - Oops:

"Mabel, look, I've found it!" Dipper pulled out the grappling hook his sister received as a gift on their first day in Gravity Falls five years ago. "Man, remember how you totally saved my life with this?"

"Yeah, I'm pretty awesome, aren't I?" Mabel replied.

"You can say that again," said Dipper.

"I'm pretty awesome, aren't I? phltpht." She stuck out her tongue and blew a raspberry. "I was only able to save both of us, after you single handedly defeated Gideon." As she mentioned the fight, she mimed some punches, finishing with an uppercut to her imagined Gideon's chin.

"Here Dip, hand it over, I want to see if I've still got it." Dipper tossed her the grappling hook, and with it, she took careful aim at the crossbar in the ceiling. She fired, and the hook bounced off the bar and squarely hit a ceramic lamp, breaking it into a dozen pieces.

"GRAPPLING HOOK!" Mabel shouted, holding up the tool above her head triumphantly.

Dipper and Mabel were back in Gravity Falls after 5 years. The Mystery Twins back in action, thought Dipper. He and Mabel were staying with their great uncle in Gravity Falls, Oregon. Gruncle Stan still lived in the Mystery Shack. The "S" on the sign had long since fallen down, giving a more apt description of both the place and the man who owned it.

The last time they were in Gravity Falls they stayed the whole summer. This visit, they were only staying one week. And right now, they were going through some old stuff their Gruncle kept from their last visit.

"Hey Dip, I found some glittery stuff. It says Love Potion. Gasp. This must be the love potion I got from the Love God." Mabel's eye went wide at the thought of playing matchmaker again.

"Don't you mean stole?" asked Dipper. "That's the stuff you used on Robbie and Tambry, right? I wonder if they're still together?"

"I don't know, you should ask Wendy. I invited her over to a sleepover tonight," said Mabel.

"Ugh, you mean putting on makeup, watching cheesy movies and talking about boys all night? Count me out," said Dipper.

"You make it sound like those are bad things."

Dipper rolled his eyes. "Back on the Love Potion, I thought you got rid of that stuff ages ago."

"Yeah, well, I didn't." Mabel giggled at her naughtiness, and held up the bottle in front of her face. "A gift from the gods should never be turned away lightly. See for yourself." Mabel tossed the flask over to Dipper, who was not expecting it.

"Wait, wha-" was all Dipper was able to say. The time seemed to move more slowly to him. He tried to catch the flask but it just bounced out of his clumsy hands. He tried once more to catch it on the rebound with his left, but it just bounced out again. Dipper reached out again with his right, but the flask would not be caught. It fell forward, and Dipper swiped absurdly at it, trying to stop it from falling, but it landed, and broke on the floor.

A giant cloud of pink dust filled the room for a couple of seconds. After Dipper and Mabel stopped coughing, they looked around, then at each other. Dipper started talking first.

"I'm, uh, sorry I didn't catch that." Dipper said, trailing off at the end and looking down at his shoes. Oh boy. Am I in love with my sister now? What if she's in love with me? Stupid hands, why can't you catch anything?

"Yeah, well, I probably shouldn't have thrown it to you when you weren't looking," she said in her actually-being-serious voice.

Ok Dipper, just look at your sister, and assess your feelings. Dipper looked up at his sister, and saw… his sister. Same as she was standing there a few minutes ago, only looking down and to the side. She was wearing one of her trademark sweaters, with a question mark symbol to signify her return to the Mystery Shack. He remembered watching cartoons with her in the mornings, and racing back home from school. He remembered normal brother and sister stuff. This is Mabel, she is my twin sister, I don't feel anything romantic. Yet, Mabel was still visibly upset.

Dipper walked over to her and placed a hand on her shoulder. "Look, Mabes, it's fine, I don't think the love potion did anything. Look, I don't feel any different. How about you?"

Mabel looked at Dipper, then looked right into his eyes, and held the gaze for a second. "No. No, I suppose I don't, broseph." Mabel, lightly punched Dipper's hand off her shoulder, and seemed to cheer up a little, a grin returning to her face.

"Yeah, it's like, we're twins right, so we already have the strongest love possible, it's not like a dumb potion could change that. Right?" asked Dipper.

"Right. But we should probably clean this up before anyone notices." Said Mabel.

"Right."

Dipper followed Mabel down the stairs, and noticed that she smelled good today. Not just average good, but really good. Why am I noticing her smell? You never noticed it before. Nothing good can come from this line of thought. Nope, never happened, you didn't smell your sister. Dipper breathed through his mouth the rest of the way down.