Disclaimer: I do not own Gravity Falls, only my original characters.

Chapter Thirteen: Finding Out

"Please tell me why we're here again." Demanded Will, floating above me as we rested against a tree.

"I told you for the hundredth time! We're going to see if Tad and Toby are actually hiding something!" I repeated, hating having to repeat myself.

Yes, I know, I shouldn't be spying on my daughter's boyfriend and his father, but I have no other choice! On the night of mine and Dipper's anniversary, I saw something in Shooting Star I didn't like. It was a mixture of vengeance, anger, and evil. Something Mabel didn't have at all! It was strange and not to mention, her eyes would flash purple from time to time.

A few nights ago, when I was working on some magic with Diana was the second time I noticed. It was a day after the anniversary and when Diana Belle was performing the body swap spell. Which means that I was in her body and she was in mine. Like what I did to my Dipper!

"Woah! This is so cool! I didn't even know you could do this, papa!" She squealed, twirling in my body.

"Yeah, yeah. It's pretty fun. I did the same thing with your mother before he and I fell in love." I explained, getting a bit upset at that awful thing I did.

"Hey, it's okay, dad. You were just misunderstood at that time and were evil. But you're not anymore and that's all that matters!" My daughter stated, hugging me.

I smiled and hugged her back. I suppose she was right; The past was the past, and that was all that mattered. Besides, I would still be the same demon as before if it wasn't for Dipper. "But can I go back into my body? I don't like the feeling of something between my legs." She stated after a while of hugging.

I laughed before nodding and going back into our bodies. "By the way, where's your mother with our tuna sandwiches?"

"I don't know. Those things usually take a while since those require a ton of mayo." Diana giggled as she looked down at her phone.

I turned my attention to the phone. "Toby again?"

"Huh? Oh, yeah! He wants to give me something super important on prom night in a few days. I wonder what it could be.." She explained, a blush coating her cheeks.

I chuckled and rolled my eyes; Those two were almost as in love as Dipper and I. I eventually floated away to inside in the kitchen. But what I found shocked me.

It was Dipper and Mabel in the kitchen but Dipper had his back turned and was stirring the tuna. Meanwhile, Mabel was walking towards him with a sharp knife in her hands.

"DIPPER!" I yelled, trying to get my husband's attention before he could be hurt.

Dipper turned his head to me then turned to Mabel. "Ah, thanks Mabel. I needed that for the onions." He then turned back to me, "What's wrong, Bill?"

Mabel turned to me as well, blinking innocently. "Yes, what's wrong, Bill?"

I was feeling a strange vibe from Shooting Star. "Oh, nothing, I just-"

"DIPPER! My face is on fire!" We heard Stanford call, which obviously meant he need Dipper for something "nerdy".

"Oh, that's for me. Be right back." My husband stated before kissing my cheek and running off.

I chuckled and rubbed the back of my head, going over to help Mabel. "Sorry about that. I just thought that you were going to hurt Dipper."

She snorted a bit. "Why would you think that? He's my brother and I love him!"

"I know and I love him too. But you can never be too careful. I have too many enemies that would love to see me and anyone I love dead." I explained, cutting up onions and putting them into the bowl of tuna.

"Oh, I know~." She sang, adding in some eggs.

My eyes widened before turning my face to her. "What's that supposed to mean?"

"It means I know you have enemies, Bill. It means what it means." She replied simply.

I could feel myself getting angry. "Is that a threat, Shooting Star?"

"Oh, no, no, Bill Cipher~. It's a fact." She looked up at me with a grin, a flash of purple coming from her eyes. Just what was going on?

"Okay, I'm back. Ford just needed help with some- What's going on?" Dipper came in and looked at us as if we were crazy.

"Oh, nothing~! Nothing at all!" Mabel squealed as she ran to finish the tuna.

"Yeah, nothing..." I mumbled, holding Dipper's hand tightly. Just what was going on with Mabel?

Eventually, everyone ate outside for lunch and Toby came over. He was always around Diana Belle, which I didn't mind anymore. But I still was confused about what was going on with Mabel. I know she wanted to kill me for Dipper taking her place when I kidnapped her, but I thought we'd moved past it!

"Will, was it you who saved me from Reverse Dipper?" I heard Blair ask my brother. I blinked; Did she not remember that it was she who saved him from that monster?

"No, no, honey. It was you who saved me from him! Don't you remember that?" Will asked, sounding confused.

"I think so... Can you tell me how?" She asked softly, trying not to seem rude.

I bit my lip before seeing Dipper going back inside to get some more lemonade. I then grabbed his arm and pulled him into the living room. "Billy, what's wrong?" He asked, tilting his head.

I then slowly but fast at the same time, explained to him what had been going on since yesterday. "And now Blair might be losing her memories!"

Dipper nodded his head. "I believe you, Bill."

I blinked, stumped. "Really?"

"Of course I do, you're my husband! Plus, I've grown accustomed to believing in strange things like this. But do you think it's Tad?" He asked, holding my hand tightly.

"There's no doubt. My parents are dead and Tad's the only demon that I can think that isn't stuck in another dimension and knows where I am." I replied, resting my head against his.

"Well, don't worry. I believe we can stop him." He smiled, which made my stomach do back flips in happiness. I was so happy I fell in love with someone who loved me back.

Which brings us back to tonight, a few days after that day. Will and I were busy watching Toby and Tad for a few days each night while Dipper and Diana, who didn't know yet, kept an eye on Mabel.

"And so we can save your wife from losing her mind forever." I explained before going back to listening.

"But I don't see why-" Will began before we heard Tad and his son arguing from one of the open windows.

"Why is the plan being moved to prom night?!" Toby yelled in an angry manner.

I blinked before grabbing Will's hand, flying towards the window and turned us invisible.

"Because you and Diana Belle are too much in love with each other that she'll gladly accept your marriage proposal. Besides, I'm tired of seeing Bill and Dipper in love while I'm stuck in that bratty girl's body. I almost got caught a few days ago!" Tad explained. A plan...? They were planning something! I knew it! Well, I didn't exactly knew it, but I had a feeling!

"No, dad! I'm tired of this! No more!" Toby cried out, grabbing a book before almost marching out.

"And if you do that, you know what I will do to Mabel or Diana?" Tad threatened with a sinister smile.

My eyes widened. So... He was planning to destroy me and if Toby helped him, he and my daughter would be safe? Well, it was nice to know that Toby wasn't evil. "... F-fine..." Toby squeaked out, sounding broken as he entered his room again.

"Good boy. Now, make sure to be ready for your first prom on Saturday. It's a brand new day!" Tad sang out as he left his son's room, shutting the door.

Toby began to sob into his hands as I looked at Will. "Alright, I believe you. Now let's stop this monster."

I grinned before looking back at the room. "A fight between a monster and a beast? Sounds like so much fun."

What's this madness? A third chapter in one day! I am on fire! Hope you all weren't too shocked about Bill finding out about Tad's plan and what he plans to do. It took me a while to create his plan, if I remember. Anyway, please be sure to fav, follow, and comment and I'll see you all in the next chapter! Bye bye!