Chapter 1

It had been one month since that amazing, life-changing sleepover at Pacifica's house. So much had changed in so little time. After getting permission from their parents, Dipper and Mabel began the tedious task of transferring to Gravity Falls High School. Normally, transferring to a new school in your senior year would be an arduous and annoying task, but considering the twins' stellar grades and equally stellar reputation in the community, the school was more than happy to accept them and approve their transcripts as quickly as possible. Now, all Dipper and Mabel had to do was find proper housing somewhere in town.

"Hmm, this place looks nice." Dipper said, pouring over realty listings. "Oh, but this one has it's own washer and dryer."

Dipper had been searching for a new place for himself, his sister and Pacifica for weeks now. Sure, the Mystery Shack was nice, and for several summers had been the twins' home away from home, but if the two were going to live in Gravity Falls year-round, they were going to need more space, somewhere they could stretch out and grow.

There was also the more obvious reason.

In the month since Dipper and Mabel decided to "share" Pacifica, the trio had found it difficult to find a moment of privacy in order to do some actual "sharing." Once Pacifica's parents returned from their trip, her house was pretty much off limits, and the Mystery Shack, with it's paper-thin walls and creaky floors, made it difficult for the young lovers to . . . enjoy themselves without arousing suspicion One time, the trio even tried fooling around out in the woods, only to run into Wendy and her friends, who were thankfully so loud and rambunctious that the three were able to get their clothes back on before being discovered.

The thing was, while Dipper and Mabel were completely, over-the-moon in love with Pacifica, and vice-versa, they knew the rest of the town probably wouldn't approve of their avaunt-guard lifestyle. (Well, Stan probably would, but that's a bit of a red flag right there.) So, for the time being, they agreed to keep everything hush-hush, which meant finding a new place was essential Not only for themselves, but for their poor, restless libidos.

Thankfully, however, they had the night to themselves. Soos and Melody were away at a FCLORP convention, and Wendy, who was supposed to watch the Shack while the two were gone . . . didn't feel like it. Dipper and Mabel saw their opportunity, and invited Pacifica over for another sleepover. So, finally, after weeks of waiting, the three lovers would finally get a little bit of much needed private time.

Of course, Dipper, always looking ahead, was too busy looking at houses to care about anything else at the moment.

"What do you think about this one, Mab– ?"

"FOUR!"

Dipper ducked just as a rogue golf ball went whizzing by his head and out a nearby window.

"What the heck are you doing!?" Dipper shouted.

"Check it out! I've got this really great idea." Mabel beamed, holding a golf club in one hand and a piece of Hot Wheels track in another. "You know how sometimes, at fancy parties, you see sushi being served on top of a naked woman?"

"I don't know what fancy parties you've been to, but go on," replied Dipper.

"Well, I figured we'd do the same thing, only instead of sushi, we make a mini-golf course."

"Wait . . . Let me get this straight," Dipper said quizzically "You want to take those Hot Wheels tracks, and –"

"Strip Pacifica down, lay the tracks over her naked body, and play her like a par 3 at the Royal Discount Putt Hutt." Mabel smiled innocently as Dipper stood there, shocked and confused.

"Why does she have to be naked?" asked Dipper.

"Why shouldn't she be?" replied Mabel, practicing her swing.

"O-okay," said Dipper. "So, where exactly would you . . . put the hole?"

"What?"

"The hole." Dipper mimed a hole with his hands. "I mean, where exactly . . . you're not going to put it in her– ?"

"Oh, get your mind out of the gutter, twin brother!"

"Says the girl who wants to shoot golf balls up her girlfriend's–"

"Look," Mabel sighed. "The track would run up between her legs, past her belly, and over her breasts, before splitting off in three directions. That way, the ball could veer left, down one arm, veer right, down the other, or, if done correctly, go up and over her chin, past her head and into the cup. Simple as that!"

"Simple?" Dipper asked before shaking his head. "Wait-a-minute, aren't you and Pacifica, like, golf rivals or something? If you're going to use her as a golf course, how is she going to actually play?"

Mabel paused for a second. "Oh! Good point," she replied, twirling the golf club in her hand. "Okay, new plan! Me and Pacifica will play mini-golf and you can be the–"

"No."

"But Dipper–"

"No way."

"But Dipper, please–"

"I'm not letting you shoot golf balls up my crotch!" Dipper yelled before covering his mouth out of fear of eavesdroppers. "Now, would you knock it off and come over here. I think I found a good listing for a new place."

"Well, why didn't you say so?" exclaimed Mabel, tossing the club to one side. "Let me see."

Mabel looked down at the listing in the paper, a medium-sized home located just off the main road into town, close to the high school, but still far enough out of the way to ensure a little . . . privacy.

"Hmm . . . It looks nice, but don't you think it's a bit pricey for a two bedroom?"

"Three."

"What?"

"A three bedroom, Dipper replied. "You, me and Pacifica."

Mabel was surprised. "I know Pacifica asked for her own room, but I figured you and I would, you know, share a room, like we always do."

Dipper began to squirm in his seat. His hands twitched. His eyes darted around the room.

"Yeah, but don't you think it's time we finally got separate rooms?" Dipper spoke. "I mean, we've been sharing a room since, like, forever."

"Exactly," said Mabel. "We've been sharing a room since, like, forever. Why do you want to change that?"

"I just think, in light of recent . . . developments, we might need a bit of . . . distance."

"Distance?" Mabel laughed. "Bro, we banged the same chick, at the same time! I think that ship has sailed. Now, what is this really about?"

Dipper sighed. "Never mind. Just . . . forget it."

The boy turned back to the newspaper laying on top of his bed.

"I'll keep looking for a place that–"

"Is this because we kissed?"

" . . . "

It was as if all the air had be sucked from the room. A painful, deafening silence washed over the twin siblings as the words hung in the air. Out of all the events from that night, there was one that perpetually gnawed away at Dipper. A single moment, laughed off as nothing at first, but that one taboo kept him wide awake at night. That single moment opened up a Pandora's box of emotions that Dipper had tried so desperately to contain, tried so desperately to shut the lid on, but with just a couple of words, Mabel tore the lid off it's hinges and spilled it's contents all over the floor.

Finally, after what seemed like eternity, Mabel spoke.

"I know we never really talked about it."

"There's nothing to talk about. It was an accident."

"An accident!?" Mabel shouted. "If that's the case, why are you acting so– ?"

"Look, I didn't mean–" Dipper fumbled. "I just meant that we didn't intend for it to happen, and we shouldn't, you know, read too much into it."

"Says the conspiracy theorist who spent his first summer here literally reading into everything about this town!"

"We both agreed to share Pacifica." Dipper countered. "We never said anything about us."

"So what?" replied Mabel. "You're just going to lock yourself away from me?"

"That's not what I'm trying to do."

"Then what is it!?" Mabel shouted. "Just tell me what–"

"I DON'T WANT TO HURT YOU, MABEL!"

Dipper's echoing voice gave way to . . . nothing as the two stood in silence.

"You are my twin sister. You have been a part of me since before I was even born. Out of anyone in the entire world, you are the one person I love the most; the one person I would protect above all others. This relationship; you, me and Pacifica; it's taboo enough as it is. If the town, or anyone for that matter, found out about it, it would–" Dipper sighed. "I just don't want to make things worse by giving into these . . . desires."

"Then, you do feel something for me?" Mabel responded.

"How I feel doesn't matter."

"It matters to me, Dipper! The whole point of all this is that we be open with one another. You, me, Pacifica; we need to be honest with our feelings, not try to bottle them away and hope for the best. Hell, I spent over a year in the closet, and it was agony. I never want to go back to that again. If you're feeling that way now, then I want to do everything I can to help you. You're my twin brother, Dipper. Just like you said, out of anyone in the entire world, you are the person I love the most."

Dipper sighed. "What if this isn't that kind of love?"

"What do you mean?"

"What if my wires are crossed, and I'm just mixing up my love for you as my sister for, you know, actual romantic love? When we kissed . . . it was in the heat of the moment, and what I felt was so intense, but what if that's all it was; the moment?

"How would we ever be sure?"

Mabel thought back on that moment, a romantic, lustful three-way between her, her brother and Pacifica. She remembered the feeling of euphoria as the two siblings used Pacifica's body for their own pleasure. She remembered the look of longing in her brother's eyes as the two inched closer together, culminating in a kiss that triggered an earth-shattering climax which, to this day, had never been matched in intensity. She had felt it's power, but even she didn't know what it really meant.

There was only one way to be sure.

"Kiss me again."

"What?"

"You heard me. Kiss me again. It's the only way to be sure." Mabel spoke. "Kiss me, and you'll know how you truly feel. There's no Pacifica here; no other distractions. It's just you and me. Kiss me, and we'll finally know where we stand."

Dipper shook his head, partly in protest, partly out of shock.

"But . . . what if I kiss you, and it's nothing?"

Worse, Dipper thought to himself, What if I kiss you . . . and it's . . . everything?

"No matter what, you are my brother, and I love you," replied Mabel. "Nothing could ever change that. The only thing that would change is how we define that love, and trust me, anything is better than not knowing."

Dipper stood there, unsure of what to do, until finally, with a single, deep breath, he began to move.

"I don't want to hurt you." Dipper said, inching closer.

"You won't," said Mabel, taking a step forward.

Dipper placed his hand behind his sister's head, pulling her in to a tight embrace.

"Last chance." He warned.

Mabel closed her eyes, her lips parted.

"Do it."

With that, the two pressed their lips together as the world around them seemed to simply . . . dissolve. It was as if the old, creaky walls of the Mystery Shack pealed away to reveal a wondrous world of light and color, of emotion and serenity, of passion, and, above all, clarity. In that one, glorious moment, everything became so clear, so . . . obvious, and for that one, all-too-brief moment, they knew. They understood.

It was all so simple.

"I love you, Mabel."

"I love you, too, Dipper."

The two looked deep into each others' eyes as they stood in near silence; the only noise being the sound of both their hearts beating in sync with one another, a wondrous, continuous rhythm . . .

. . . that was suddenly broken by a loud thud!

Standing in the doorway was Pacifica, dropping her bags on the floor as her hands moved to cover her mouth, gasping in shock at the scene before her.