A/N: I was thinking of doing this as a one shot but then I thought why not my first full FFN story of Bellarke so here is My Best Mistake hope you all like it and Feedback will help determine if you want me to go on

Rated M for Coarse Language and Sexual Content

IDOAT


~My Best Mistake~

Part One

I woke up to feel a draft against my skin as I sat up and stretched then a bursting headache surfaced, I drank way too much last night then the suddenly realization of moans and thrust I sat up and looked over seeing my own best friend naked Bellamy Blake in my bed. I covered my mouth in horror what did I do. I have Finn or had Finn. I suddenly remembered the sequence of events

Last Night

I was at the club dancing with Octavia his youngest sister partying away for my 21st birthday, then I saw over her shoulder Finn and the girl I knew as Raven sitting on his lap. I growled and went over.

"Finn, what the hell?!" I yelled

"Can we help you?" Raven interjected

"I believe, you're sitting on my boyfriend!" I shrieked

"Get real we've been together for three years, I'm visiting from Arizona."

"He said you two broke up." I said shrinking back

She stood up from her spot on his lap and looked at him furiously

"Finn!?" She yelling towards him

He stood guiltily

"Oh so you move somewhere new and you wanted to get someone new." Raven said furiously "We're done!"

She stormed out and there stood Finn and I, he was about to say something to me

"Save it, you broke my heart!" I cried running towards the exit

I ran out into the rainy storm into my car, I sat in the driver seat and hit my steering wheel in anger and hurt

Then there was a knock on my window, I saw it was Bellamy.

He and I have been best friends since basically we were born, we knew each other inside and out. We are always partner and crime and we always find a compromise when we start an argument

"Let me in it's raining cats and dogs!" He yelled

I unlocked the car and sat on the passenger side he slid in and closed the door

"What happened?" He asked softly

I whimpered and started crying

"Ssh you don't have to tell me now." He whispered hugging me to him

He smelled so nice for a guy nice and musky like the forests evergreen

"Can you just stay with me tonight?" I asked

"Of course, I would do anything for my best friend."

I smiled and wiped my tears

"Let me just go tell Octavia and we can go."

I nodded and sat back as he left

Then he was back in a flash, he started the car and drove me to his apartment, when we got inside I went straight to his liquor cabinet and grabbed Tequila.

"Woah slow down." He chuckled

I grabbed a shot grabbed and poured myself the tequila and drank. He came and sat next to me.

"So you want to tell me what happened?"

"Finn has another girlfriend." I sniffed

"What?!" He growled

"While I was dancing with Octavia I saw another girl that looked like his ex and I confronted her and she expressed that she was his girlfriend as well and she stormed out and then I left without hearing his final say and here we are.

He took a swig of tequila and shuddered

"I knew that dick was trouble but I didn't say anything because you were happy. I'm so sorry Clarke."

"No it's okay it's not your fault." I whimpered

We kept drinking and talking about each other's problem like we always did and the alcohol got heavier within our systems

"Bell." I said while I was laying on his bed

He looked at me from his sitting position on the sofa

"Yeah Princess?" He said

"Do you think I'm sexy?" I asked lazily

"I think your crazy beautiful and sexy." He admitted

I smiled lazily and he came over to the bed

"No one can ever love me, I'm so ugly." I sobbed

Then he grabbed my face and made me look at his brown orbs

"Clarke Griffin you are the most beautiful and sexy girl I have ever met, you are sweet, funny, adventurous not to mention sexy and stubborn as well. Any guy would be crazy for you." He admitted

I smiled then kissed him hard then I pulled away in horror

"I'm sorry." I whispered

"Never be sorry for wanting something." He whispered then kissed me softly, I wrapped my arms around him and pulled him down onto me. He groaned and took off my blouse, I reached for the hem of his shirt and pulled it off his head leaving him shirtless, I buried my hands in his dark curls pulling him by the roots, his kisses led down my jaw, to my neck to my collarbone and then to my covered breast. My breath hitched as he unhooked my bra in one shot and he flicked my nipple, I moaned and wrapped my legs around his waist then he reached for my jeans and unbuttoned them removing them along with my panties. Her kissed down my stomach slowly and to my thigh then down to my pussy. I moaned as he rubbed me there

"I'm gonna make you feel so good, you'll never stop screaming my name."

Then he rubbed my clit and I was gone and clutching the sheets beneath me

"Oh Bellamy!" I cried out in pleasure

He grinned and inserted two fingers inside me, I cried out even more then he leaned down between my thighs and licked my pussy playfully

"Ooh Bellamy don't stop!"

He flicked the tip of his tongue on my clit and fingered me at the same time. I was feeling so much pleasure this was no where near compatible with Finn nor her or high school boyfriend. I grabbed at his dark curls forcing him into me.

"Fuck me! Oh my God! I'm going to cum." I moaned

Then he pulled back and took off his pants along with his boxers I saw his shaft stand and I giggled grabbing it

"Holy shit." He moaned

I sat up eye level with him and stroked his toned abs, I stroked him softly and he groaned

"I've always wanted to know, how this felt between us." He whispered

"Well now you can." I smiled

He smiled sweetly and kissed me hard, he laid me down and stroked himself softly

"Are you sure about this? Cause after we do this we can't fight what happens next."

"I'm sure." I nodded

He thrust into me and I cried out holding his hand as he thrusted repeatedly, I moaned as he groaned and he was whispering sweet things in my ear as he fucked me."

"Ugh..you...feel...so...ugh...good." He groaned

I pushed him up off me and he laid there confused then I climbed on top of him positioned myself and sunk down onto his cock

"Oh my god!" We exclaimed

He grabbed my hips and moved me as I moaned

"Fuck Clarke!" He groaned

I moved quickly and felt myself coming to a release

"Bellamy, I'm going to cum."

"Me too!" He groaned

Then we both cried out each others name and slumped next to each other, I covered myself and Bellamy breathed looking at me

"That was the best sex, I have ever had." I smiled

"Me too, Princess."

"We should sleep." I smiled

Then I fell asleep on his chest

What have I done, that was the best sex ever and Bellamy is my best friend did I just cross the line of our friendship? Maybe he regretted it. I slowly slipped out and checked my phone. Seven missed calls from Finn and Four from Octavia, one from an unknown number. I put on my underwear and bra, then searched for the rest of my clothing put it on swiftly and ran out the door not looking back.