Point of View: Mabel

  I yawned, standing up, and stretched. I rubbed my eyes, and looked at my surroundings, not entirely sure what had happened last night. I looked over at Dipper's bed, and rubbed my eyes again, to make sure I was right about what I was seeing. I was.
  Will was laying on Dipper's bed, Dipper right next to him. Will had his arms wrapped around Dipper. I snickered, but put a hand over my moth to cover it up. They'd figure it out on their own.
I walked downstairs to see Gruncle Stan making stancakes, Gruncle Ford making sure hair didn't get in them.
  That's when it happened.
  "AAAAAAAAAAAAAAAAAAAAH!"
  I recognized Dipper's scream, but there was someone else's mixed in there too. I assumed it was Will's. The Gruncles looked up from their meal, then looked at me laughing.
  "Who else is up there?" Asked Gruncle Stan. "And why are he and Dipper screaming?"
  I giggled. "Well, a friend Dipper met in the forest named Will had a sleepover with us last night." I said, remembering now what happened.
  "When we all decided to go to sleep, Will didn't wanna sleep on the floor, so Dipper said he could sleep in his bed. Dipper also didn't wanna sleep on the floor, so they both slept in the bed, trying to scoot to opposite sides... well, their position was a bit different when they woke up."
  Gruncle Ford didn't get what I was saying, so he continued cooking. Gruncle Stan laughed, then also got back to making the stancakes.
After about ten miutes, Dipper came downstairs, his face slightly red. "Mabel, did you do that?" He asked, glaring at me. He was mad, but mostly embarrassed.
"For once, nope." I said. The stancakes were done, so I grabbed two of them and put them on my plate, then poured syrup all over them. Waddles looked up at me from under the table, so I handed a piece of one to him. "Where's Will?"
  Dipper glared at me. "He walked out the door about three minutes ago. Guess you didn't see him." I finished my stancakes and smiled. I hadn't seen Will walk out the door, earlier. I wondered where he went...

Point of View: Bill/Will

  I sighed, sitting near the shore of a river in the forest. My mind was racing. I didn't like the confusing feeling in my stomach. I assumed I was "embarrassed" as Shooting Star had referred to it in her mind. It wasn't a good feeling. It was making my face red.
  Taking a breath, I frowned. Surely it wasn't Pine Tree making me feel so embarrassed, right? He was just a stupid human. I was the powerful dream demon, not him. I sighed, and picked up a rock, throwing it into the river. So what was making me feel like this?
"Focus!" I hissed to myself. My brain had been a bit fuzzy last night, so I hadn't been focusing on what I was supposed to be doing. It didn't matter, this feeling. It was a distraction for a moment, now it was gone.
I threw another stone into the river. I didn't know why I was doing this. It was fun. I liked the way the water splashed, and decided to try something.
I threw another stone into the water, and this time when the water splashed, I used my powers to move the water up into the air, and then splash down onto a bush. Hmm. Maybe I could use that trick, but in a different way, without my powers. It could come in handy with pranks.

Point of View: Dipper

I was sitting on the edge of my bed, the door locked. Mabel was standing outside the door. "Dipper, you can't just leave me out here! It's my room too. I didn't have anything to do with what happened, I swear!"
I believed her. I didn't know why, it seemed like she had obviously put Will and I in that position last night... but, I knew when she was lying, and right now, she wasn't. I let her in.
"Thanks Dipper." Mabel sighed. "I really didn't do it, I promise. I think it just... happened." I was a little skeptical, seeing as Mabel did stuff like that... I ignored my doubts, she wasn't lying. But how the heck did this happen? I guess we could've accidentally scooted closer to each other in the night... I didn't want to think about it.
My eyes started wandering around, until they rested on a piece of paper on the nightstand next to my bed. I had moved it the previous night to avoid laying on it, but I hadn't actually looked at it. I flipped it over, and saw a half-colored, rough sketch of... what the literal heck!?
It confused me that I couldn't remember who had drawn it. The sketch was of Bill Cipher, but with a cipher wheel on each side of him. I could see something faded behind the center drawing of Bill, but it wasn't fully drawn, so I couldn't tell what it was.
"Hello, earth to Dipstick! Dippin dot, what's wrong, can't you hear me?" Mabel had been talking to me, but I had spaced out.
  "Oh yeah, uh, what did you say?" I asked, hoping she would ignore the fact that I had just not heard a word she had said.
  "I said, I'm gonna go to the library to see if there's any good books on scrapbooking, so I was wondering if you'd want to come. Unless you have plans..." I looked at her, and she was staring at me with her sly sibling stare. I pushed her face away.
  "Yeah, I'll come. Just gimme a minute to fix my hair."
  Mabel walked out, and I grabbed a comb and ran it through my hair. I then stuck on my pine tree hat, and walked out the door, sat in the back seat of the car, and closed my eyes. Maybe I could find a good book on how to figure out if your sibling has an evil plot while I was there?