Since Bill has canonically alluded to him screwing the reader of the book of bill's mom, I made this.
Enjoy.
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In a kitchen, a family of three sat down happily. A man whose face was hidden by a large newspaper, a tomboy 13 year old girl with short messy black hair that could easily be mistaken for a boy and a woman with long brown hair. The little girl happily chowed down a plate of pancakes before turning to her mother. "Mom, can I get more pancakes? These are great!" She said in a cheerful tone.
Her mother chuckled. "No." She deadpanned. "It's unhealthy, Maddie." She said in a stern and serious tone, causing Maddie's shoulders to drop dejectedly with a whine at the loss of pancakes.
Suddenly, her dad chirped in. "Oh c'mon, honey. I'm sure a few more won't hurt my sweet daughter." He said cheerfully, still behind his newspaper, causing Maddie's eyes to widen.
"Really?" She asked as stars lit up in her eyes before she turned to her mom who sighed in resignation. She quickly placed another another plate of pancakes in front of Maddie. The tomboy stared at the food, practically drooling before her mother spoke.
"But just because today is a special day." She said with a creepy smile, her eyes slit and emitting a faint yellow hue. Maddie sweatdropped. Her mind raced to find out what today was before she decided to ask.
"Uhh, what is today?" Her mother froze. Frozen in time as light seemed to fade from everything in the world. "Hello? Mom? I splashed orange juice on my bedsheets." She said in confusion before worry appeared on her face. "No reaction? Mom would usually be livid."
Sudd, she heard a familiar voice speak. "Yeah, but I doubt she'd pull your corpse out of the grave just for a scolding." Bill Cipher? She thought in confusion before turning to the source of the voice, her dad. Before she could wonder why the voice of a cartoon character was coming from her dad, the newspaper he was holding was put down to reveal the triangular dream demon himself. "Heya, kid!" He said waving at her.
Her jaw fell in shock. "This is a dream!" She exclaimed, her expression changing into one of excitement before a cup of soda manifested in her hands. Bill laughed gleefully.
"Already abusing the power of the mindscape. I'm so proud I'm tempted not tell you the next part!" Bill exclaimed, licking a his tears that fell down his face with a forked tongue that extended from his eye. Maddie grinned cheerfully as she waited for the demon's announcement. "Anyways, you're dead. Congrats!" Confetti fell from the ceiling as Maddie froze. What? Bill's words made her heart beat faster with anxiety, but she didn't believe them. before reality shifted before her very eyes and she was suddenly sitting in front of a large projector screen with Bill next to her. "Don't believe me? Don't worry, I already made a twenty eight slide presentation about it." He said pulling out a one button remote and pressing the button.
Suddenly, a familiar scene appeared on the projector screen. It was her hanging with her friend. She tried to remember their name, but a frown appeared on her face as she failed to remember anything about them. Bill pressed the button again and the projector screen now showed her and her friend heading down the road before coming across a crosswalk. Maddie remembered this vividly and her eyes widened in shock. "Whoa! Looks like you already remembered on your own." Bill chirped in. "Let me just skip to the gorey visual representation I cooked up based on your memories"
Before Maddie could reply, Bill pressed the button a few more times to show the scene of a car hitting the tomboy not focusing on her surroundings while on the crosswalk only to end up as a bloody mangled mess. Her bones were twisted out of shape as blood escaped every orifice of her face. Maddie's eyes widened as she saw the scene. Horror seeped into her mind as she felt nauseous. If she wasn't dead already, her heart would've burst out of her chest as Bill laughed. She knew these memories were true. Tears started to flow out of her eyes before Bill spoke.
"But don't worry because you're getting reborn!" Maddie's metaphorical heart skipped a beat. She didn't wanna be reborn. She wanted her old life. "On another earth!" What did he mean by that? She thought before Cipher continued. "As my daughter!" Multiple questions swirled around her mind like a hurricane. Is Bill real? Is she going to Gravity Falls? Is she gonna be a triangle?
"Yes, yes if you mean the show and no." Bill replied nonchalantly reading her mind. "Unfortunately, there aren't more of my kind to pass on my voluptuous figure so you'll have to settle for looking human." He added almost sounding disappointed. "Also, before you ask, it was your new mom's idea. What a freak!" He continued, rolling his eyes in exasperation.
"You know about the show?" Asked Maddie in shock before he floated next to her and put his arm around her shoulders.
"I saw your memories. Big fan of the Alex fella but that's a horrible ending." He said cheerfully. "I mean, really? Memory gun? That's lame. I'm gonna avoid that in the future." No no no no! Bill's going to take over the world! And it's my fault! She thought in a panic. "Oh, don't worry. You'll love it! Just look at all the memories we have together." Suddenly, a family photo book appeared in his hand. He opened it to Maddie to reveal pictures of her and Bill. The pictures, they were of her and her dad. She could remember most of them clearly. But now, whenever she tried to remember, Bill was there instead. She couldn't remember her old dad. Anger welled up inside her. She couldn't even be that angry at him considering all the memories she now had of him, all the bonding was affecting her.
"You were shedding large parts of your mind to fit your new host, so I took some creative liberty and saved the important parts for you." He said cheerfully. "Aren't I a good papa already?" Suddenly, Maddie's mind began to shake violently, interrupting the tomboy's panic. "Well, looks like you're getting born! See ya on the other side! Byeeeeeee!"
And before Maddie could reply, all had faded to white.
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Meanwhile, at a hospital, Miss Gravels was ready to give birth to her first child. As she sat in the hospital bed, ready for the operation, she reminiscenced about the the baby's father.
She had fell into a mysterious rift in reality and met a demon. A yellow triangle with one eye. His presence was immense. Upon seeing him, she immediately got on one knee and proposed. He immediately called her a freak with and refused to even get close to her out of disgust. "How romantic." Miss Gravels blushed just thinking about the encounter from her hospital bed.
The demon, asked her how she got here and she told him about the rift. He was immediately interested. She gladly took him to the rift. But it seemed as if he couldn't get through. She flirtingly suggested to give her his baby to take it through and he paused with a hum before replying with "You've convinced me." And zapped her stomach with some kind of beam. The rest was history.
Interrupting her romantic thoughts, the doctor finally entered the room for the delivery. It was painstakingly difficult, but she pulled through for love and after hours of work her beautiful little baby was born. On the side of her left shin was a birthmark. One that looked like tattoo of a velcro shoe with a baseball drawing.
Miss Gravels stared at her daughter in her arms lovingly before freezing. "Right! A name!" She muttered with a hum. "I'll name you Alic-"
Suddenly, she heard a voice scream into her mind. "It's Maddie, meat bag." Miss Gravels blinked before turning to the baby.
"Maddie? Hmm, yeah. It's a good name." Said Miss Gravels with a smile as she hugged her own baby. "Maddie Gravels. Thank you, hot triangle."
From the mindscape, Bill Cipher watched this scene before rolling his eyes. "If she gets within 10 realities of me, I'm calling time police." He deadpanned before turning around. "Now, time to work on some plans. I'm not dying to some memory gun. EVER."
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Her birthmark is baby Bill's old Velcro shoes from the book of bill.
Tell me if I should continue this.
Toodles.