Chapter 2

Do you know that moment when you've run out of excuses? Have you ever found yourself completely exposed, vulnerable and with no other options except for maybe hurling yourself out the nearest window? Have you ever been caught with your hands, or, in this case, tongue, thrust firmly in the proverbial, or incestuous, cookie jar? What runs through your head in those moments? Does time slow down? Does your heart race? Do your arms go numb as your legs turn to jelly?

For Dipper, it was all of that . . . and more.

His limbs suddenly became so weak, he could barely support the weight of his twin sister, who stood there, clutched firmly in his embrace, so closely, in fact, that they were still connected by the loose strands of her hair that clung haphazardly to the side of his face, a symbol of their devotion, and evidence of their sin.

"Oh. My. God!" Pacifica gasped.

"Pacifica!" Mabel choked, her body racked with guilt over betraying her friend and lover. "We didn't mean to–"

"I can not believe this!" The heiress shouted.

"Pacifica, I . . . We can explain!" Dipper fumbled.

"This is just so . . . just so . . ." Pacifica rambled.

"Pacifica, we're sorry!" Mabel cried.

"It's just so . . . FUCKING HOT!"

" . . . say whaaa?"

"I mean . . . Holy Shit!" Pacifica exclaimed. "I knew you two had a thing, but I didn't think you'd have the stones to actually . . . you know! This is so great!"

"A thing? Wait! Seriously, you're okay with this?" asked Mabel. "Jeez! I mean, I knew you were kinky, Pacifica, but I didn't know you were this kinky."

"Ha! Says the girl I just caught playing tonsil-hockey with her own brother!" Pacifica replied.

"Pacifica . . ." Dipper cried out, trying desperately to regain his composure. "We're not–"

"How long?" She asked gleefully.

"How long . . . What?" asked Dipper.

"How long have you two been fucking behind my back?"

"What! No, no!" Dipper recoiled, finally releasing his grip on Mabel. "Pacifica, I swear, we haven't done anything like that!"

"Well, not yet, anyway."

"MABEL!"

"What?" The Pines sister laughed. "It's not like it isn't going to happen eventually." Mabel cracked a mischievous grin. "You and I both felt it, Dipper. You even said it yourself." She wrapped her arms around her brother.

"You love me."

"I . . ." Dipper panicked. "I think maybe I should go."

Dipper turned to leave, but Mabel refused to let go.

"Oh, no you don't, bro!" Mabel shouted. "You are not shutting down on me, again! Not after everything we've gone through to get to this moment."

"Okay, what the hell is going on here?" Pacifica asked. "Are you two fooling around or not?"

Mabel sighed. "Remember the first night we all had sex?"

"Vividly," the heiress beamed. "Go on."

"Well, right before . . . everything came to an end, me and Dipper locked lips, and ever since then, there's been some tension between us. So, I figured we should kiss again in order to see if there was anything there."

"Was there anything there?"

"Totally."

"Nice." Pacifica purred. "Wait, so you two kissed right as you both . . . Does that mean you two kissing is what got you off that night?"

"Oh God! I do NOT want to talk about this!" Dipper stomped around, his face hot with embarrassment "Can we please just STOP!"

"What's wrong, Dipper?" asked Mabel. "You heard Pacifica. She's fine with it."

"BUT, I'M NOT!" The young man yelled at his confused sister as the room went silent.

"Dipper . . . ?"

"I just . . . this is all happening so fast, and . . . I'm afraid." The young man confessed. "I'm afraid that . . . when all is said and done, we'll end up regretting this, and I don't want that kind of guilt to ruin our relationship."

"Oh, Dipper," Pacifica cried as she ran over to her man, wrapping her arms around him. "Look, I'm sorry. I rushed into things just now. I didn't realize how sensitive all of this was for you." Pacifica pulled him into a gentle kiss. "No matter what happens, we love you, and whatever you need, we'll be there to help you. Isn't that right Mabel?"

"Of course," said Mabel, joining the embrace. "Whatever it takes to help you adjust to . . . all this; however much time you need, we're both here for you."

"Thanks, girls." Dipper smiled. "I just . . . I just wish there was a way I could . . . you know, be with Mabel without feeling so guilty about it."

Just like that, it hit her! It was as if a light bulb went off in Mabel's head. Suddenly, she began to smile, then chuckle, before bursting out in a cackling laugh."

"Umm . . . Mabel? Are you okay?"

"Oh, I'm better than okay. In fact, I think I just had the best idea ever!

. . . . .

"Mabel, are you sure this is a good idea?" Dipper asked as he helped drag the heavy load up the stairs.

"All of my ideas are good ideas!" Mabel responded enthusiastically

"Really? Even that time you bedazzled your own face?"

"Hey, it worked, didn't it?" Mabel struggled as she and her brother hauled their cargo through the attic doorway before dropping it onto the floor.

"Alright, I think I waited long enough." Pacifica said as she lounged on Mabel's bed. "Do you mind explaining what your plan is, Mabel?'

"I would love to, Pacifica." Mabel threw her head back, wiping the sweat from her brow.

"Behold!"

With that, the excited teen unfurled the thick shag carpet onto the floor, light blue in color with a yellow circle in the center. Inside the circle were two arching arrows running counterclockwise, and in the corner of the carpet, a small tag bearing the words "Experiment 78."

"Wow . . . A tacky blue rug," Pacifica said sarcastically, "so worth the wait."

Dipper sighed. "It's one of Uncle Ford's old experiments: The Electron Carpet."

"Yep," Mabel beamed. "All we have to do is step on this rug, zap each other with a little static electricity, and BOOM! Body switching!"

Pacifica's eyes went wide. "Are you serious? This thing can actually switch our bodies?"

"That's right!" Mabel smiled. "I figure the easiest way for Dipper to work through the issues with our relationship is to ease him into it."

"So, the two of us switch bodies . . ." Pacifica started, "and then . . ."

"And then you can make love to him in my body!" Mabel grinned. "That way, he can be with me guilt free because he knows it's really you in there."

The looks on Dipper and Pacifica's faces were priceless; a mix of shock and confusion. You could practically hear the gears turning in their heads as they tried to process the information.

"Mabel, I . . ." Dipper started.

"Look bro, you need this, and don't you dare tell me that the thought of plowing Pacifica in my body doesn't turn you on. I can clearly see the bulge growing in your pants."

Dipper blushed, trying desperately to cover himself. "That's not what I mean. It's just thought . . ."

"I think what Dipper is trying to say," Pacifica interrupted, "is that, if we really want to ease him into this, it might make more sense for you to make love to Dipper in my body first . . . God that's a sentence I never thought I'd say."

"No way, Pacifica!" Mabel replied, taking the rich girl's hand. "If, or rather, when Dipper and I make love for the first time, I want it to be in my body, but I'm more than happy to rent it out to you for a bit so my bro can . . . work out his frustrations."

"Mabel . . ." replied Pacifica, "I don't know . . ."

"Too late! You're on the rug!"

Pacifica looked down to find that, indeed, Mabel had pulled the young heiress onto the shag carpet, their feet shuffling on the fuzzy blue fabric, surging with static electricity.

"Mabel, No!" Pacifica shouted.

"Mabel, Yes!" The Pines girl exclaimed as she tapped her friend with the tip of her index finger, setting off a massive flash, bathing the entire room in a bright light, which nearly blinded poor Dipper. In a matter of seconds, the light faded, leaving the two girls slightly dazed in the middle of the room.

"Mabel? Pacifica?" asked Dipper. "Are you two okay?"

The two girls looked down at their bodies, carefully exploring their hands, legs and chest until, finally, an ecstatic squeal came out of Pacifica's mouth.

Except, it wasn't Pacifica.

"This is awesome!" Mabel squealed as she felt up her new body. "These boobs are huge, and her ass is amazing! This really was the best idea ever!"

"Speak for yourself!" Pacifica sighed, pulling at Mabel's colorful outfit. "These clothes are so– Ow! What the– ?" Pacifica winced as she peeked under Mabel's sweater.

"Um . . . Mabel, what is . . . did you bedazzle your bra?"

"Oh . . . uh . . . maybe?" Mabel laughed, "but don't worry. You won't be wearing it for long."

"What? Oh!" Pacifica smirked as she turned to Dipper, his face beet red and a visible tent in his pants.

"You're up . . . Shooting Star!" Mabel laughed as she pushed Pacifica towards her brother, admiring her own ass in the process. For all it was worth, Dipper stood dumbfounded at the sight in front of him. She may have had his sister's face and body, but the fire in her eyes and the sway of her hips was all Pacifica.

"So, are you ready for this, Dipper?"

"Umm . . . I–" Dipper started.

"Shhh! Just relax." Pacifica whispered as she led Dipper to his bed, stripping off Mabel's sweater, revealing the colorfully bedazzled bra underneath. "Your twin sister is going to take good care of you."

"Pacifica!" was all Dipper could say before being pushed on the bed and immediately ravaged by the young woman in his sister's overstimulated body.

"No more talking!" Pacifica commanded. "After all this, I am so worked up, I need to have it, and I need it now!"

Her hands pulled at his clothes, tossing them every which way as her lips trailed kisses up and down his chest. Dipper's heart began to race. His breathing became heavy. He honestly could not believe the sight before him. Sure, he knew that behind those big, doe eyes, it was Pacifica pulling the strings, but it was Mabel's body pressed firmly against his. It was Mabel's hands unbuttoning his pants and pulling them to the floor. It was Mabel's lips and tongue trailing kisses down his chest, across his stomach, all the way down to the tip of his–

"OH DEAR GOD!" Dipper exclaimed as he was enveloped in a warm and wet embrace. His eyes rolled back in pure delight as his hands gripped the bed sheets for support.

"Oh . . . OH! . . . MABEL!" He shouted. "Sorry! I mean–"

"No, it's okay," Pacifica gasped, coming up for air. "Call me by your sister's name! It's such a fucking turn on!"

Dipper tried to protest, but was instantly made silent as Pacifica returned to the job at hand, stimulating every nerve ending in the young man's member, sending bolts of pure electricity throughout his body, and flooding his mind with enough endorphins to leave the teenaged genius in a complete stupor, to the point that he could only manage the same phrase, over and over.

"Oh Mabel . . . Oh Mabel! . . . OH MABEL! . . . OH!"

Suddenly, on the other side of the room, Dipper could hear a familiar voice moaning almost as loud as he was. Out of the corner of his eye, the young man spotted the source of the noise. There, on Mabel's bed, he saw Pacifica, or rather, Pacifica's body; half naked, breasts exposed, hands thrust down into her panties, watching the scene before her unfold.

"Oh yes . . . Oh yes! . . . More . . . MORE!" Mabel shouted as she furiously pleasured herself from across the room, one hand gripping her breast as the other stimulated her throbbing loins. "Keep going! . . . Do it! . . . My God, this is so kinky! I don't know how much longer I can last!"

Pacifica perked her head up and laughed. "Looks like she's enjoying herself." The young heiress turned back to Dipper. "Time to give her a real show."

With that, Pacifica tossed away her final articles of clothing, the bedazzled bra and her now thoroughly soaked panties. The two lovers were completely bare. Dipper laid there, hard and erect as Pacifica towered over him, eager and ready while still in Mabel's body.

"Oh, wait!" Pacifica paused. "Do you have a condom?"

Dipper froze. In his lust, he completely forgot about protection. After all, this was his sister's body. The last thing they wanted to do was risk–"

"It's fine," a voice from across the room called out. "You don't need it."

The two lovers did a double take. "Are you serious, Mabel?" Pacifica asked.

"Yeah. I'm on the pill." Mabel responded between moans, her hand still thrust down her pants. "Besides . . . I want to see you do it raw!"

Pacifica turned back to Dipper. "Well, you heard her, Pine Tree." The young woman positioned herself over Dipper's throbbing member.

"Ready to head into the unknown?" Pacifica asked.

"Nope." Dipper replied. "Let's do it."

With that, Mabel's body came thrusting down onto Dipper's manhood.

The young man couldn't speak. He couldn't move. He was completely engulfed in a pleasure so intense, it paralyzed him, and the knowledge that he was receiving that pleasure from his sister's body only heightened the experience, taking him to peaks of euphoria he did not think were possible.

For Pacifica, unfortunately, it was a different experience.

"Fuck! That hurt!" The young woman shouted.

"What?" Dipper froze. "Pacifica, are you okay?"

"Yeah, I–" Pacifica winced. "Hold on, I just . . . jeez, this hasn't hurt like this since . . . wait a minute . . ."

Pacifica turned to Mabel, staring daggers. "Mabel, you bitch! Are you a virgin?"

Mabel smiled as she tried to avoid eye contact. "No . . . well, not exactly."

"What does that mean; not exactly?"

"Well, I have done it with you, haven't I?" Mabel laughed, "and I have other . . . experience."

Does any of that . . . experience involve a penis going inside your vagina?" Pacifica asked, "or maybe a dildo, or, hell, ANYTHING!?"

"Well . . . No." Mabel said flatly.

"God damn it, Mabel!" The heiress fumed. "Were you just using me as a stand-in to punch your v-card?"

"No! I really want to help my brother, and I really think this is the best way to do it." Mabel cried out. "I mean, yeah, the thought did cross my mind, but it wasn't the main reason I–"

"Mabel, shut up!" Pacifica sighed as she adjusted to Dipper's girth.

"Pacifica, are you okay?" Dipper asked. "I'm sorry if I–"

"It's okay. You did nothing wrong." Pacifica smiled before glaring back at Mabel.

"I'll deal with you later!"

Slowly, but surely, Pacifica became used to Dipper's size. As she began to bounce up and down on his shaft, a rush of pleasure flooded her mind. Within moments, her thrusts became longer, deeper and harder, as the two drew more and more pleasure from their quivering, sweat-soaked bodies. Soon, the pair were moaning in euphoria, with each movement taking them ever higher, their pleasure growing and growing to the point where they were teetering on the very edge of sanity.

"Oh God. Oh God! YES!" Pacifica exclaimed. "Harder! Faster! MORE!"

"Oh jeez. OH JEEZ! Pacifica! Pacifica, I'm gonna–"

"Do it. Do it, Dipper! Cum inside me." Pacifica shouted.

"CUM INSIDE YOUR SISTER!"

That was all Dipper needed as the realization of what he was about to do overpowered his senses. Any semblance of restraint was gone as he released deep into his sister's flailing body, triggering Pacifica's own climax in the process. The heiress threw her, or rather Mabel's head back as her body went ridged, holding on for dear life as the flood gates burst open. Mabel, for her part, could only sit and watch as the sight of her own body enthralled in orgasmic bliss finally set her off, and she roared in pleasure from across the room.

Just as quickly as it began, it was over. The three lovers lied spent upon the twin beds. Pacifica suddenly went slack with exhaustion as she collapsed onto Dipper, who could barely keep his own eyes open.

"Was it everything you hoped for?" Pacifica whispered.

Dipper could barely stay conscious, but with his last bit of strength, he replied.

"All of that . . . and more."

With that, Dipper shut his eyes and went to sleep.