Mabel POV:

Mabel burst into the room smiling brightly. "Dippin' sauce! You got to check this out! I fou-" Her words were cut short as she saw a 'Teenager' with a yellow suit. Damn. That's fine.. The girl's thoughts were quickly vanished as she saw a wild grin on his face. "Hello, Shooting Star..." Her eyes widened and she pointed. "ITS THE TRIANGLE GUY! BILL!"

The human Bill ran a hand through his blonde hair and smirked. "Glad you noticed! Well I'll be taking Dipper with me now since he gave his soul and body to me!" Mabel gasped and looked at an ashamed Dipper. "Dipper! How could you?!" She didn't give him and time to answer and smacked him and then walked to the dream demon and pulled on his ear. "What'd you make him do this time?!"

Bill actually found that it hurt. In a bad way so didn't laugh and swatted her hand away. "Oh I just threatened to kill you and Stanford Pines if he didn't give himself to me." He smiled sweetly which earned him a slap. "You're not taking him away! You asshole!" That was the very first moment Mabel said a 'Bad word' and it surprised even Bill.

She was furious! Bill kept messing with them and it wasn't cool. "Woah there Shooting Star! I didn't know you had it in ya!" The girl squinted at him and said very calmly. "He's. Staying. Here." The dream demon looked as if he was in thought then snapped his fingers. "How about I pretend to be a normal human without any powers and work for Stan BUT Dipper still has to follow my orders as stated in the deal."

Dipper facepalmed but Mabel thought hard. This is Bill we're thinking about here... If he's giving an offer then we should take it at least but I don't know what he'll do to Dipper... "Oh, nothing bad!" Bill grinned and Mabel shushed him. "Stop reading my mind and let me think!" Bill held up his hands and whistled as he walked in circles, waiting for her response. After thinking about the pros and cons she finally made up her mind. "Fine! But don't kill Dipper! And let's shake on it!" The dream demon grinned and walked to her, holding his hand out that was surrounded in blue flames.

"Mabel, don't!" It was too late and she shook his hand and Bill grinned. "A deal's a deal. This time, I won't do anythig to break it~" The dream demon grinned even wider as Mabel squinted at him. "Go now so Dipper and I could talk!" Bill shrugged and snapped his fingers, dissapearing in an instant.

"Dipper, freaking, Pines! What the heck did you do?!" Mabel put her hands on her hips and frowned at him. "He told me he would kill you both if I didn't shake his hand! This is what I get for saving a damn demon!" Mabel froze. "Wait, wait- you mean you saved Bill? What the hey-hey!" Dipper only groaned and fell first first on the bed. She threw a book at him and crossed her arms. "Now, Bill owns you. He's not going to do anything bad to you on my watch got it? And-"

~Meanwhile her long lecture~

Bill POV:

'Oh this'll be fun...' Bill thought as he snapped his fingers and transported to the front door of the Mystery Shack. He put on a fake innocent smile and twirled his cane around which was becoming a habit. The human looking dream demon knocked on the door and waited only to hear, "I didn't do it! Get off my property!" He snickered under his breath and made his voice sound normal and have less echo to it. "Ah, I'm sure you didn't but I'm not here for that."

Footsteps were heard as Bill waited, his top hat staying still by only his hand since it was so windy. The door opened and revealed Stanford Pines, other known as Grunkle Stan. "What do you want?" Bill smiled and held out his back gloved hand. "My name is William D. Cipher! I was wondering if you had a job opening for here at the Shack?" Stan took it, shaking it and smiled too, thinking of how much money he could get from him. "Yeah, I got a couple of things you could do, come in." The dream demon grinned and stepped in once Stan moved out the way.

"Oh, nice place." He had learned a lot from how humans talk by studying them and seemed normal as ever. It wasn't much fun but a bit amusing to see the one who tricked people being tricked. "Yes, it is! There are a lot of lazy workers so I'm sure you can take their place if they are not here or are just being teenagers. But Welcome to the Mystery Shack!" Lightening thundered at his creepy voice and Bill raised his eyebrows. That was a coincidence he would never forget.

"Thank you! Also, may I stay here? I currently have nowhere else to go-" He was cut off. "Oh, of course! You can share a room with my two nephews! Dipper and Mabel." Bill made an unsure face. "Are you sure a girl would mind sharing a room with me?" Stan thought about it and grinned. "I'll just move her to another room. Dipper needs some friends and some mature ones at that!" The dream demon smirked internally and bowed slightly. "Arigato."

"What's that mean?" Bill stood up straight smiling. "It means thank you in Japanese." He got a nod in response and was lead upstairs to the twins room. Stan barged in only to see Mabel wacking Dipper with a newspaper rolled up. "Ha! Children fighting!" Grunkle Stan took out his camera and started recording. "We're not kids! We're sixteen!" Dipper yelled while trying to avoid getting hit in the face. "Same difference!" Bill plucked Mabel off of Dipper ad smiled at her that was innocent but the look in his eyes told her to quit her shit.

She frowned and crossed her arms as she was set down. "My name is William Cipher! Who might you be?" Mabel remembered to play along and smiled cheerily. "Hi! My names Mabel, I make sweaters and love sparkly stuff! Do you want to be my boyfriend?" That last part just slipped. He was hot... "Mabel!" Dipper frowned at her and stood in front of her. "Sorry about her. I'm Dipper. Dipper Pines." He held out his hand smiling slightly. Bill took it and shook it, squeezing his hand gently, chuckling and flashing him a grin. "Don't worry about it. Also, nice to meet you both."

Stan had stopped recording and looked at Mabel. "Hey, Mabes. Is it alright if William and Dipper share this room and I'll get you a new one? Great!" He didn't wait for her answer and turned and walked away laughing. 'William' smirked and let go of Dippers hand and pulled the teen closer, putting his right hand on the side of his head and did the same with his left and traced Dipper's lips and held his mouth open. "Ah.." The shorter male trembled and clutched onto Bill's suit as he looked up at him, over the years he only grew about three inches and was short to the dream demons human form.. Oh how Bill loved it when he trembled.

Mabel watched, ready to pull Bill away from Dipper but something stopped her. The sight before her.. looked like... BOYS LOVE. She felt her face heat up and some blood drip from her nose. She couldn't possibly ship this. No way.. But Bill would definitely top. Oh God someone stop me... She silently begged in her mind. "You're mine, Pine Tree. If anyone so called touches a hair on your body... They. Will. Pay." His voice was dark and possessive causing Dipper to whimper and his grip on Bill's suit tighten as he heard this declaration.

The dream demon grinned, moving to hold Dipper against the wall, putting a leg in between his thighs and whispered in his ear but loud enough for Mabel to hear also. "I can only touch you.. I am the only one who can handle you like this. You're my prey. I'll eat you all up~" His words and actions set the sixteen year olds face on fire and also Mabel's. "KYAAAAAAA!" Blood spurt out of the girl's nose and she fell back.

When Dipper tried to get out of his grasp to help Mabel, Bill only held him tighter and leaned in close to his face, keeping his thumb in his mouth to pry open the boy's mouth. Of course the dream demon had thought about doing things to Dipper, as in marking him and making him his own by the thing called, 'sex' but he was clueless that the situation looked unbelievably wrong. "Do you understand, pet?" Dipper's body trembled more and he nodded. "What was that? I can't hear you."

Bill took his thumb out of Dipper's mouth but to only trace his lips. "Y-Yes..." The younger male said shakily. "That's yes master to you." His knee rubbed against Dipper's crotch hard, not only making him shiver but to let out a squeak in surprise. "Y-Yes master!" This time, it was Bill's turn to feel shivers go up his spine. The way Dipper cried that out made him realize how the situation looked and loved it greatly. "Good boy."

He reluctantly pulled away from Dipper who was panting slightly and was red to the face. Bill looked at Mabel who sat up and held a tissue to her nose. "I don't ship it... I don't ship it.. I. Don't ship. It." She muttered but all of her denial slipped away as Bill blew Dipper a kiss and winked. "Catch you later, Pine Tree~" With that, Bill walked past the bloody nosed Mabel grinning, fixing his suit. "Fuck it!" She exclaimed causing Dipper's eyes to widen as his sister who indeed said fuck for the first time. "I SHIP IT." His face turned crimson and he facepalmed. What exactly were they doing with their lives anymore?