Step-Sibling Rivalry (Finn Wolfhard x Reader)

𝙿𝚕𝚎𝚊𝚜𝚎.

Did he say what I think he said?
But... Finn...
He couldn't have? He- He wouldn't...

" What? "
He was still above me and leaned in to kiss me again, but I moved my head away.
I gently pushed him off me as I sat up,
half-naked.
" What, girl? "
I chuckled, hoping he was joking.
" A girl at the bar, and we went out for a couple of drinks and whatnot? "
Finn rubbed the back of his neck, laughing.
No, Finn...
He couldn't have?
Please, no?
He wouldn't do that to me?
I'm guessing he noticed the expression on my face had changed.
" It's- It's no big deal, though, right, Y/n?
It was a one-time thing anyway.
She doesn't matter to me- "
Why'd he say it was no big deal?
" Finn- "
" Wait, before you say anything else- "

" What did you do with her? "
I asked him, sternly.
Unsure of if wanted to know or not.
" Y/n we didn't- "
" What, did you do with her, Finn? "
A lump started to grow in my throat as it tightened.
Water slowly started to swell up in my eyes.
" We only made out in the bathroom- "
No, Finn...
" Oh my god! "
I stood up from his bed, grabbing the first thing
I saw.
It was Finn's shirt and wore it.

" But that- that's all we did Y/n!
I swear to you! "
Finn stood up too, trying to defend himself.
That's just...
" Why- Why are you telling me this now?
Why didn't you tell me last night?! "
I didn't realize it but, I was already crying.
" I just remembered this morning!
Last- last night was all just a blur
till I got to Jack's place! "
" That's fucking bullshit- "
I laugh burying my face into my hands.
" It's not bullshit! I swear to you!
Please! I promise! I- I was drunk Y/n! "
He yelled at me.
" Oh my god, you are unbelievable."
My hands were on my head, I didn't know what to think or what to do...
" Y/n, I stopped and got out
before anything went beyond that because
I- I thought of you! "
" Oh, Finn! That's it!
That makes it a whole lot better!
Fuck, I still can't believe you right now..."
I shouted till I lowered my tone.
" Baby, I'm sorry I- forgive me please,
Y/n? You gotta?
I never meant to do that to you on purpose! "
Finn shouted, his eyebrows contorted, trying to prove his point.
" That- That's still cheating, Finn.
Jesus. "
I reached heavily, our voices bouncing off from the walls in his room.
" What!??? No, it isn't. "
He argued with a stupid statement.
" It isn't???
How the hell is it not- "
Looking him dead in the eye, holding he would say the right answer.
but he interrupted me.
" Y/n! We- We were practically on a break!
You can't tell me you didn't go out
with some guy too!?? "
He gestures his hand to me.
" Oh my god! "
My hands were brought up to my head.
" Okay you didn't- you didn't- "
He tried switching up his assumption.

Does he think I'd do that?
After all that I've gone through
these past DAYS.

" Holy shit, do you think I'm that fucking stupid!??
Do you really think I'd do that?!???
Of course not Finn! "
" No, Y/n- "
He was about to shout again but I,
" I was fucking miserable,
longing for you!
Waiting, and wondering if you'd
ever come home!
Scared shitless if something happened to you!
But now, only to find out you were out there
making out with some random chick
you met at some bar!??!? "
I shot back at him, and I knew I was right.

A Break?
He serious?
He just fucking left with outta trace.

He kept quiet, his hand covering his mouth.
The boy was shaking.
He knew what went down...
" Y/n, please- "
" You- You just left me, Finn?
We- We never agreed or talked that it was going to be a break.
You just fucking took off. "
In a calm tone, I die my words down.
Cutting him off.
Finn looked up at me with guilt in his eyes.
" There's- There's no point in shouting if this...If... "
He was eager to hear what I was going to say.

God, it pains me to say it.
I don't- I don't want this to happen...

Holding my tears in, I cover my eyes.
My face quivered from all the tinglingness
that I felt rush through my whole body.