Chapter 4

"YOU'RE MABEL!" Dipper exclaimed, pointing at his sister.

"Ye– Yeah . . . Sorry." Mabel winced, her face flushed with guilt.

"I can't believe this! How could you lie to me like this?"

"I didn't lie!" Mabel replied. "I just . . . Okay, I lied, but I had to, Bro! You were just so nervous about . . . everything. I figured, if you could do me while still thinking I was Pacifica, you would loosen up and be able to, you know, preform."

"And? Did he preform?" Pacifica asked, smirking.

"Oh, he preformed, alright. We're talking an Oscar-worthy performance!"

"Lucky girl!" Pacifica laughed. "To think I missed it getting your damn sodas."

"Speaking of, could you give me one?" asked Mabel. "I am seriously dehydrated."

"That's Enough!" Dipper shouted. Mabel and Pacifica both froze as he shook. "I still haven't forgiven you for tricking me!"

"But Dipper, I didn't mean to–"

"He's right, Mabel."

"Pacifica?"

"Remember when I tried to trick you and Dipper by spiking your drinks?" asked the heiress. "It wasn't right for me to deceive you back then and it wasn't right for you to deceive your brother tonight. Even if it was with the best intentions, a lie is still a lie. You need to make this right."

"Pacifica . . ." Mabel sighed, realizing what had to be done. "You're right."

Mabel turned to her brother.

"Dipper, I'm sorry. It wasn't right for me to trick you like that. I love you, and the last thing I'd want to do is hurt you."

Dipper sighed. "Mabel . . . I–"

"Besides," Mabel smirked. "Didn't it feel absolutely amazing to cum inside of me like that?"

Dipper blushed with embarrassment. "Yeah . . . It was pretty great."

"And now that you know that you really came inside me, inside your sister; body, mind and soul, how do you feel?"

"I . . ." Dipper paused. How did he feel? Now that the shock had worn off, was he any worse off than where he was before? Did any of his fears or anxieties come to pass?

"I feel pretty good. I guess . . ."

"And look outside! Has the sky ripped open? Has the sun gone out? Is a triangle-shaped demon reeking havoc on the town?"

"No," Dipper sighed, "None of that is happening, Mabel."

"Right. So you had an amazing, passionate sexual experience with your sister, and nothing bad happened?"

"I . . . Yeah, I guess you're right." Dipper smiled.

"And, and this is the important part," Mabel said as she sauntered up to her brother, "If I were to say that I wanted to do all of that again, would you be willing?

Dipper's body went ridged, in more ways than one.

"Absolutely!" Dipper exclaimed.

"Good," said Mabel, "because once I get a few sodas and some candy in me, we are gonna go all night!"

"Not without me!" cried Pacifica. "You had your turn. Now, it's mine!"

A few Pitt Colas and a handful of sweets later, and the three sugar-high teens were making love once again. Dipper kept himself busy as the two women passionately made out with one another. Hands and tongues probed every inch of their young bodies as Dipper thrusted away with his manhood, splitting his time between Pacifica and his sister, his fears and anxieties dropping at the waist-side.

"Oh God!" Dipper moaned.

"This is so nasty!" Pacifica cried out.

"Oh . . . Wow! Bro, I love your dick!" Mabel squealed as Dipper thrusted extra hard into her quivering pussy.

Soon, the confines of the bed were too small for the sex-starved lovers as the three teens rolled onto the floor, a mass of limbs that delighted in stroking, pinching, petting and thrusting into one another to the point of ecstasy.

"I'm gonna cum!" Mabel squealed.

"Me too, sis." Dipper cried. "I'm so close."

"Let's all do it together!" Pacifica yelled. "I'm almost there!"

The three pushed each other over the edge and allowed themselves to be enveloped in pure, orgasmic bliss. Their bodies tingled with excitement as they were overcome with earth-shattering orgasms, and everything went white.

Although, that might have been because they accidentally rolled onto the body-switching rug.

When the smoke cleared and the dust settled, the trio looked around the room at one another.

"What happened?" said Mabel, coming from Pacifica's body.

"I think . . . I think we all switched bodies, again." Dipper stuttered while trapped inside Mabel.

"Okay, so if I'm actually Mabel . . . "

"And I'm really Dipper, that means . . ."

"Oh! This is interesting." Pacifica smirked from inside Dipper's body, standing tall and stroking a very erect penis.

"This gives me a very interesting idea."

"Me too!" Mabel shouted as she turned to her brother.

"I'll go get the Hot Wheels tracks!"

. . . . .

A month rolled by, and Dipper, Mabel and Pacifica soon settled into their new home on the edge of town. Friends and family were happy to see the trio out on their own, but they were a little suspicious of their relationship, especially since the house they decided on only had a single, extra-large bedroom with a single, extra-large bed . . . and what was with that weird, blue rug?

Then again, this is Gravity Falls. This town is used to its share of weirdness.

The End