Princess Bubblegum *POV*

After Finn and Marceline left my brother decided to go into the lab.

"Little sis whatcha up to?" He cheerfully asked. I didn't want to ruin his happiness not after what happened in his past relationship.

"Me? I'm just doing scientific things." I answered

"Okay, well have fun with that I think I'm going to go and see Fi now" He waved goodbye and left. NOO NOOO NOOO YOU CAN'T SEE HER UGH. GUMBALL YOU HAVE NO IDEA WHAT SHE IS KEEPING FROM YOU. OH CRAP...NO IDEA WHAT I'M KEEPING YOU.

I was trying to catch up to him before it was to late. "Gumball" I yelled his name. Too many candy people. D'UGH people just move for crying out loud. I saw Gumball, and called out his name again, "GUMBALL" It tried again, "GUMBALL" He looked and stopped. I went up to him. "Gumball there is something you should know" I told him.

"Okay what is it?" He was confused.

"Finn's mom is keeping something from you." I was trying to catch my breath, and continued, "She has a big secret, I just found out myself today and yes I'm totally shocked about it, but you have to believe me."

"What? Believe you with what?" He was even more confused and wanted to know.

"Marceline and Finn are not what you think" I told him.

"Yeah I know they are boyfriend and girlfriend and by the way they make the cutest couple ever. My future son will marry his-" I interrupt him.

"SISTER" I blurted out. "They are brother and sisters siblings from the same mom." I the looked at him and he eyes got to wide with shock.

"No!" He yelled then he went into calm mode, "How are they even brother and sisters?! Unless, wait no you're just messing with me so I don't have to be king." He said teasing me.

"Gumball please believe me." I begged.

"Uh sure I guess. Sorry, but I have to go and Fi now or else I won't ever have my chance with her." He walked off. I decided not to chase him anymore. He won't listen fine that's his problem not mine. I went back into my lab, and decided that I should do some experiments to keep my mind off of things.

Finn and Marceline

Finn *POV*

"Marceline you can let go of my back pack now" I said while she kept dragging me.

"Sorry. Its just that we have to go back to your place now" She apologized, and let go.

"Why?" I asked.

"Because, if we don't people would be yelling all over the place. Do YOU want that?" She asked

"No, but what is...OHHHHH okay I know now."

"Yeah Finn." She continued, "We are getting ourselves into deep shit" She sighed, and took a big paused. "Honestly I think that we should have listen to our parents."

"What?! No?! Because, of you-" I paused I didn't want to go on anymore.

"Because we are siblings. We will always be. No matter how you look at things differently we have always been siblings." She was getting a little choked up. "Look Finn I thought I really did like you, but I can't and I know that. It sounds really weird, but we need to not have feelings for each other anymore. Just because I'm your sister and you're my brother. This was not meant to be. I can see that. I would have love it if you-" Before she continued I gave her a kiss on the check.

"I know I'm your brother. The good news is that we will always love each other no matter. Honestly I think it's best if we were siblings after all. Plus it would have been really weird finding out we were siblings later on in the future" I nudge her a little bit. She laughed, like old time.

"Okay c'mon we better hurry" She said and we literally ran the rest of the home. We were at the front of my house. "Finn is everything okay?" Marcy asked.

"Um yeah I just never felt so nervous entering my house before. I feel like when I open the door everything will go into flames." I answered.

"Lets open the door together on the count of three" she advise. I nod my head, and she count down "1, 2, 3" On the three we opened the door.

"Hello, mom I'm back with Marceline." I called out.

"Kay sweetie I'll be down in a minute." My mom said.

"Looks like nothing went on in here." Marcy stated. Marceline and I sat down at the kitchen table in silence until the door opened another time. I looked to see who it was. OH MY GLOB! It was Gumball. Great hopefully this will work out smoothly.

"Hey Gum-" before I could even finish he put his finger near his mouth signing me to keep it quiet. I nodded and he went over to the kitchen table.

"Guys when Finn's mom comes down here we gotta play it cool. Kay?" He whispered softly. Marcy and I gave him a nod. It was really quiet like nobody wanted to say anything which was really weird. "Finn how long have you and Marceline been going out?" He asked in a whisper.

"Oh um yeah we aren't going out. Things are complicated right now." I replied with a whisper. What it's not like I'm lying to him. I wanted to tell him the truth, but I just can't. It's to hard.

"Oh, but at least you guys still are the best of friends right?" He asked.

"Exactly he's like a brother to me?" Marcy stated.

"Now I understand" Gumball said. Just then I hard footsteps.

"Shhh" I said quietly. Marcy and Gumball nodded.

The footsteps went even more close to the kitchen. Gumball froze, Marcy's eyes was in shocked. I just didn't know what to think at this point.

A/N: YESSS I ended it in a cliffhanger. MUWAHAHAHAHA XD I can't help but thank you everyone who's been reading this. Hopefully next chapter will be up soon. I know you guys can't wait any longer to see who's now in the kitchen. It's going to get really good really good. Hope you guys enjoyed this chapter. If there is any other story request you want me to do, the poll in on my profile. Looking at the poll there might be a monster high fanfic, but its up to you guys to vote. I'll keep it open until the end of this month. Future notice: Thanks for all that has been voting 3 love you guys