"That'll be $49,99."

Mabel extended her arm as her customer took out two twenties and a ten, slapping them down on the brunette's hand as she told her to keep the change and hurriedly exited the boutique with her newly purchased clothes, without uttering as much as a 'thank you' or a 'goodbye'.

She didn't mind the attitude; in all honesty, she was already used to it. Gravity Falls was a really small town and people would get sick of each other easily and act out towards one another. Thankfully, there were still some who actually bothered to be polite towards her and others. She always enjoyed when they came in, sometimes just to say hi to her.

She hummed a happy tune to herself as she stored the money away in the register drawer and closed it, leaning over the counter as she inspected the inside of her small store. There weren't many customers inside at the moment, probably because it was close to lunch time, and those who were there seemed to be browsing mindlessly through the many articles of clothing in hopes of finding something good. She liked to keep an eye on her customers as they roamed around, having suffered a theft or two in the past. Sure, they had installed security cameras after that, but she always liked to stay alert.

Making sure everything was within normality, Mabel nodded to herself and picked up a box of unfolded sweaters from underneath the counter, which she began to fold neatly one by one. She wanted to have done that as soon as she opened the store earlier, but she had an unusual amount of customers in the morning that kept from getting much done.

Nice to meet you!

My name is Dipper Pines

P-P-Pines, Pines, Pines…

She muffled a giggle as she glanced down at the picture of her brother on her phone's screen, noticing from the corner of her eye that some of the customers had curiously looked up at her due to the odd ringtone. She quickly picked up the smartphone from the counter and slid her finger across the screen to answer the call, trying to keep herself from laughing at the strange looks she was getting as she brought the device up to her ear.

"Hey bro, whaddya know?" she greeted her twin, holding her phone with her shoulder so she could keep folding the clothes.

"H-hey, Mabes!" Dipper chuckled, sounding ratter nervous. "How've you been?"

"Is everything OK, Dipper? You sound kind of on edge."

"Wha-what?" he laughed forcedly, unable to hide the uneasiness in his voice. "What g-gave you that idea?"

"I haven't heard you stutter this much since that time you had to tell dad you crashed his car on the way back from senior prom." She stated, a small smirk appearing on her lips from the memory. "What did you do this time?"

"Alright…" he sighed. "But before I begin, please have in mind that this was an accident."

"Trust me, bro-bro, whatever you did can't possibly shock me." She giggled as she smoothed some creases on one of the sweaters she was folding. "Not after all the crazy stuff we've seen and done over the years."

"I accidentally told mom about Bill."

The thick sweater escaped Mabel's slender fingers as she suddenly felt like she had lost all the strength she needed to hold it, along with her ability to breathe. Her eyes almost popped out of her skull and she could feel her heart pounding like a jackhammer against her chest as she processed what she had just heard.

"You WHAT?!" she shouted at the top of her lungs, making some of her customers jump and look up at her worriedly.

Mabel quickly took her phone from between her shoulder and her ear and turned around, her cheeks feeling incredibly warm.

"Dipper, how could you do that?!" she whisper-shouted into her phone, trying to steady her breathing. "Mom and dad were never supposed to find out about him!"

"I know, and I'm really sorry! Mom called me and she was asking how Pacifica was and telling me how much she liked her and how she wished you could find someone who could make you as happy as she makes me, and then…" he paused, a long sigh emanating from the other side. "I'm still not sure how it happened, but before I knew it I was telling her about how happy you were with Bill. I'm really sorry, I can't believe I just let it slip out like that!"

"What am I supposed to do now?" Mabel whined, burying her face in her free hand. "Mom's gonna call me any minute and ask a million questions on the matter. And I can't just tell her the truth! It would destroy her!"

"I don't know, Mabel. Maybe it's time mom and dad found out what's been going on in your life."

"Oh, really?" she scoffed. "Then I guess I'll just call her myself and say 'Hey mom, how's it hangin'? Oh, by the way, I'm dating a demon and he got me pregnant last year, so now you're the proud grandmother of a half-demon baby girl'! ARE YOU OUT OF YOUR MIND RIGHT NOW?!"

"Mabel, calm down!" Dipper exclaimed, sounding almost as panicked as her. "I'm sure we can think of something."

Mabel opened her mouth to reply, but quickly shut it when she heard the beeping sound of an incoming call coming from her phone. She felt her heart sink when she brought her phone down and looked at the screen, where she saw a picture of her mother. She swallowed the lump forming in her throat before taking the phone back up to her ear.

"Mom's calling me." She whimpered, her mouth suddenly feeling incredibly dry. "What do I do?"

"Try to stay calm. And don't worry. You're a grown woman, so they can't punish you for your choices anymore. Plus, I really think it's time they finally knew the truth."

"OK, I'll try." Mabel sighed as she began to think about what she was going to say. "If you don't hear back from me in thirty minutes, I probably moved to another dimension. I heard Mewni is pretty nice this time of year."

"Alright." Dipper chuckled lightly. "Good luck."

"Thanks, bro-bro."

As soon as she heard her brother hang up, her nerves returned at full throttle. She stared at her mother's picture on the screen, her thumb hovering indecisively over the green 'answer call' icon. She actually considered ignoring it, but she knew her mother wouldn't stop pestering her until she answered her calls. Taking a deep breath, she finally lowered her thumb and accepted the call, her hand shaking as she took the phone up to her ear again.

"H-hi, mom…"

"The little boy then opened the box to reveal what looked like a doll's severed arm. He seemed confused by why he had received such a gift, but all that is forgotten when the arm latched onto his neck, and he heard his father's maniacal laugh as everything went black. The end."

Bill Cipher gently closed the book in his hands as he glanced towards the black wooden crib before him, where his half-demon baby girl was sleeping soundly. A wide grin spread across the humanized dream demon's face as he stood up from his seat and made his way towards his snoozing daughter, watching her squirm slightly as he pulled her blanket over her shoulders.

"Pleasant nightmares, my little devil princess." He whispered, gently brushing her tiny purple locks. "I can't wait until you're old enough to show me your true potential."

The blond released a long sigh as he observed her chest rise and fall with each breath, but jolted when he suddenly heard the front door slam open and then close just as loudly. He heard a female voice groan audibly from downstairs, a voice he had heard a lot over the years.

"BIIIIIIIIIIIIIIIIIIIIIIIIIIILLLLLLLLL…" she whined almost desperately, bringing a sympathetic smile to his face.

"Looks like mommy's home." He declared, giving his daughter's hair one last stroke before snapping his fingers and disappearing from Erin's room.

He reappeared in the living room, stifling a chuckle when he saw his girlfriend lying face-down on the couch, still groaning loudly.

"Bad day at work, honey buns?" he asked almost mockingly as he sat on the armrest next to where her head was.

"The worst…" she moaned into the couch cushions beneath her. "Something terrible happened."

"How terrible are talking about?"

"Dipper spilled the beans about us to my mom." She declared, reaching for one of the throw pillows and pressing it against the back of her head.

"Oh. Well, I guess it was bound to happen sooner or later." He shrugged. "Was she mad?"

"Not exactly. She was mostly happy that I'm finally in a relationship."

"Really? You'd think she would be furious that you're dating a demon whom you had a child with."

Mabel didn't reply; she simply remained silent after that remark. Bill frowned when he realized what her silence meant.

"You didn't tell her, did you?" he deadpanned as he furrowed his brow.

"I couldn't!" she exclaimed, lifting her head to meet his gaze. "How could I explain all that to my mom? She would be devastated!"

"I see how it is." He murmured as he crossed his arms. "You're ashamed of me."

"Of course not!" she quickly sat up and placed a hand on Bill's shoulder. "I could never be ashamed of you."

"Then why is it so hard to tell you mother the truth about me and your daughter?"

"Because they would never accept it! Worst of all, they would never accept you! How would you feel if you had to tell your parents that you're romantically involved with a human?"

"I don't have parents. I was created thousands of years ago along with the Earth itself."

"But imagine if you did have parents. Do you think it would be easy to tell them about me?"

Bill tapped his chin as he imagined that scenario, realization dawning on him after just a couple of seconds.

"Ohhh…" he said, his eye widening slightly. "I get it."

"Thank you." She sighed, slumping against the couch.

"But you can't hide us forever. What if they want to come visit some day?"

"Oh, yeah… about that…" She giggled nervously, lightly tugging at her hair. "They've invited themselves over for dinner tomorrow."

"WHAT?!" Bill shouted. "And you allowed it?!"

"I couldn't just say no! They're my parents!"

"Alright…" Bill sighed as he pinched the bridge of his nose to calm himself down. "I can see there's only one way out of this." He extended his index finger upwards, a small blue flame appearing on the tip.

"Bill Cipher! You're not seriously thinking about killing my parents, are you?" Mabel inquired in outrage.

"Actually, I was just planning to burn the house down and fake our own deaths." He stated before blowing out the flame.

"That's terrible! Besides, I have a better idea."

AUTHOR'S NOTE (PLEASE READ)

*Eddy Murphy's voice* I LIIIIIIIIIIVE!

Wow, it sure has been a while, hasn't it? I'm sorry I didn't update sooner, but I've been really busy. Those of you who follow me on Twitter and/or Tumblr know what's been going on in my life, what with me taking my college acceptance exams and then applying last week.

Anyways, about this fic. I was planning for it to be a one-shot, but then I realized it was going to turn out really long, so I'm dividing it into two chapters. Also, as always, I'll be taking suggestions from you guys! If you have any good ideas about how make the encounter between Bill and Mabel's parents funnier and more interesting, don't hesitate to throw them my way! ;D