Warning! As this oneshot is a lemon, there'll be sexual content!

House: Gryffindor

Requested by: bookfangirl2008

 People often called me the Marauders Girl, simply because I often hung out with them and participated with their pranks. I knew of the map they had made of Hogwarts, and I also knew that they had many secrets hidden between the four of them but it wasn't my place to pry so I didn't. I did however end up falling for the Marauders bad boy - Sirius Black.

It was hard not to, his long wavy hair and dark sparkling eyes were enough to make any girl swoon, but then on top of that he was troublesome and fun, but also had a caring heart and he always looked out for others. He wasn't aware of my feelings for him, but it didn't take long for James and Remus to notice. They'd drop subtle hints when he was around and I'd glare at them each time, them making a joke of the situation but to my surprise Sirius never seemed to catch on. The pair of them tried to convince me that Sirius would say yes if I asked him to be my boyfriend, but looking at his flirtatious behaviour it seemed as though he was fine being single if it meant he could have flings.

I tried to keep myself distracted from my feelings for the wild boy, and was currently setting up a prank with James, Remus and Peter. Usually Remus wouldn't get too involved in the pranks they pulled given the fact he was a prefect, but according to James some Slytherins had ticked him off and this plan was his idea much to my surprise. We were now stood in one of the corridors that led to the stairs down to the Slytherin common rooms, the three of them setting up the prank whilst I kept watch. "Where's Sirius?" I asked.

"Detention probably," Remus shrugged nonchalantly.

"Why, do you miss him?" James nudged my arm.

"Shove off, Potter," I said, pushing him. He just chuckled and went back to focussing on setting up their prank. "Dammit, we need more rope," he suddenly said.

"I think there's more in our dorm," Peter said.

"(y/n), could you go grab it for us?" James asked and I sighed, nodding. As quickly as I could I walked all the way back to the Gryffindor common room, up the spiralling staircase towards the boys dorm. I frowned when I saw a sock on the door handle, but shrugged it off and pushed it open however I did not expect to see what I saw. Inside was Sirius, masturbating.

As soon as I opened the door he looked over, his face pale and we both took a moment to register what had just happened. He immediately jumped up, grabbing his pillow and covering himself up with it. He was still wearing his shirt, but his trousers and boxers were on the floor. "(y/n)?! What the hell are you doing here?!"

"I'm so sorry! I'll - er - I'll just go-," I felt so embarrassed that I had caught Sirius of all people having a private session with himself. The sight of him half-naked and grasping his member like that was engraved in my mind, and I even caught sight of his sexy expression before he turned to see that I had interrupted him.

As quickly as I could I stepped out of the dorm, slamming the door shut and spending a few seconds on the spiral stairs, trying to comprehend what had just happened. As I was about to walk away however the door opened again and Sirius stood before me, this time wearing boxers as well but it was obvious he was still hard. There was a slight pink tint to his cheeks as he looked at me, and I was scared we were never going to be able to have a civil conversation again. "Will you help me out?"

"S-sorry?" I thought I had misheard him.

"Will you help me," he gestured his erection and for a moment I lost my voice. Thankfully there was no one on the stairs to overhear us. He looked at me expectantly, making me feel intrigued. 'Did he really want this? Me?'

"Sure," I found myself saying, him smirking. I followed him inside the dorm and shut the door behind me, him already slipping out of his boxers and sitting on the bed. I crept up to him, gulping and trying to comprehend what was happening, but I had to admit that I was excited.

I knelt down in front of him, seeing his large member up close and it being a little intimidating but also rousing. I bit my lip as I brought my hand up to the base of his member, gently pumping it to begin with. I wasn't entirely sure how far he wanted me to go, whether he would be okay with a handjob or whether he wanted a blowjob. Whatever he wanted I would do it, and I knew I'd have to take care of myself afterwards due to the fact I was beginning to feel wet just from looking at him.

I continued to pump my hand up and down his member, feeling as though I myself wanted more. I leant down and wrapped my lips around the tip of his member, a small gasp coming from his lips. I looked up at him for the first time, seeing his eyes trained directly on me, putting more pressure on me. Despite having never really done this before I pretended I knew what I was doing, keeping my confidence afloat as I took more and more of him into my mouth every time I bobbed my head. My hand still pumped the base of his member, and judging by the guttural moans coming from Sirius I had a hunch that he was feeling good.

He placed his hand on the back of my head, moving me quicker and slightly rougher, his member going deeper into my mouth. He began to get a little carried away, choking me a little as he thrusted his hips up as well. There were pants coming from him and I had a feeling he was close to cumming, however I was trying hard not to gag from the intensity of his thrusting.

Him being this desperate for me made me feel incredibly wet, and I had to clench my thighs together to alleviate myself. I had at this point completely forgotten about the other Marauders and was instead focussed on what I was doing, as well as how I was feeling - I was definitely going to need time on my own after this. "(y/n), I'm about to cum-," he grunted, scrunching up my hair in his fist as he thrusted quicker. All I could do was let out odd moans, trying to gasp for any oxygen I could get when suddenly my mouth was filled with hot liquid. It was strong and bitter, it being quite an unpleasant taste but he let go of my hair allowing me to pull myself away from him, swallow the liquid and finally breathe. "That was amazing," he whispered, collapsing back on his bed.

I stood, unsure on what to do or say but I was wet and knew I needed to alleviate myself soon even if it meant heading back to my dorm and doing it myself. Slowly I attempted to creep away but he suddenly sat up and took ahold of my hand. "Let me repay you," he said with a mischievous smirk making my eyebrows raise.

"Excuse me?"

He suddenly pulled me down so that I was lying on his bed with him, him rolling on top of me and pinning him underneath me. "I want to pay you back, I can tell you're horny. Don't try to convince me that you're not, I could tell when you were blowing me that you were trying hard not to touch yourself," he growled, his words sending shivers down my spine.

"You don't have to say it so crudely," I hissed irritably and he laughed. I felt a little conflicted due to my feelings for him - I didn't want this to be a one-time thing and for feelings between us to never be shared, but as he began kissing and licking my neck I found it hard to say no. He didn't waste any time and began touching my breasts through my shirt, his lips on my neck making me want him more and more. Despite that though I attempted to resist until he began unbuttoning my shirt and moving the attention of his lips further down.

He pulled my shirt completely off of my body, my bra following mere moments after as his attention then turned to my breasts. The way he stared at them embarrassed me, but before I could say anything he began sucking and lightly biting them making me let out gasped moans. "Sirius- ngh-," I had to admit that it felt good, and he massaged the other that was occupied my his mouth. My core felt like it was burning now, and I knew I wouldn't be able to stop even if I wanted him too. I looked down and was able to see his half-hardened dick. I didn't want to be the only one feeling this way, so I reached down and took it in my hand.

A few grunts left his lips as I began pumping his member, his sucking on my breast becoming even harsher. His member was getting harder in my hand as I continued, grasping it tightly and quite surprised it was getting so hard again so soon. We latched onto each others bodies, pleasuring each other until I could barely take it anymore. I didn't want to be one to beg, but if he didn't do anything more to me soon I would explode.

"Now it's your turn," he said teasingly, pulling my skirt down to reveal my cotton underwear. "Cute underwear," he said in an almost mocking tone and I gritted my teeth. I had other pairs of sexier underwear, but they weren't necessarily for everyday use unlike these simple cotton ones. Plus how was I to know that I'd walk in on Sirius Black masturbating, then end up getting undressed by him?

"Shut up," I hissed, trying to remain calm. He brushed his fingers against my womanhood and I tried to hold back a gasp but he was annoyingly good and I was annoyingly sensitive. My underwear was getting wetter until he finally decided to drag them down too. He was staring at my soaked core, embarrassing me until he suddenly latched his lips against my core making my back arch and my head fall back. "Sirius!" I exclaimed before I could stop myself, the feeling of his tongue running through me sending electric sparks all over my body. I could barely contain myself, his tongue exploring every nook and cranny going from my clit to my entrance and back again.

I grasped ahold of his black hair, scrunching it in my fist in an effort to alleviate myself. My other fist clenched his bedsheets whilst my chest rose and fell quickly with every breath. Tears were coming to my eyes as I felt so good that I already thought I could cum. His tongue buried itself deep within my core as his thumb massaged my clit. My legs were twitching which was a sign I was getting close however just before I was about to cum, he pulled away.

"S-Sirius?" I looked at him with pathetic desperation, the build up to my release slowly dying away. He wiped my juices from his chin with the back of his hand, him kneeling above me and taking in my naked form. His dick was standing to attention, pre-cum leaking from the tip.

"(y/n), can we have sex?" He asked plainly and my cheeks heated up but I was too desperate to turn back now. I wasn't thinking straight, or about the complications this could have on our relationship. I was too hypnotised with him, and he began lining himself up with my entrance, gently pushing the tip of his member in. I grabbed the pillow behind my head as he slowly filled me, him feeling much bigger now that he was inside me. The gleam in his dark eyes told me how keen he was to get started, so I gave him a nod and he didn't hold back.

Immediately he began thrusting, moans leaking from my mouth as the sound of skin-slapping filled the room. He knew how to move his hips as he took ahold of my waist and lifted me up, him able to slam into me harder this way. My breasts bounced with every move but I was too lost in the intense pleasure he was dealing me to care about how I looked - all I wanted was him.

The bed was creaking as he squeezed my bum, the tears of satisfaction leaking from my eyes. I was panting heavily, moaning with every thrust. "(y/n), you look so hot," he growled with a smirk making my cheeks heat up.

"S-shut up," I covered my face with my hands, feeling the sweat on my forehead. I suddenly felt two hands around my wrists, pulling my hands away from my face.

"Don't cover yourself," he said, moving us so that I was laid down flat and he was on top of me in missionary. My legs wrapped around his waist out of instinct and soon he began thrusting again, me letting out another cry as he somehow managed to push himself in deeper.

Now that his face was closer to mine I could see each of his ticks: his eyebrows twitching slightly and small pants leaving his slightly chapped lips. There was slight sweat forming on his brow, causing some of his long black hair to stick to it. The headboard was hitting the wall as he continued, our two hot bodies stuck together like glue. My eyes were purely transfixed on his face whilst he looked down towards his dick that was pounding my pussy. Before I could stop myself I lifted his chin up and pressed my lips against his.

For a moment he seemed shocked, apparently thrown off guard as he stopped thrusting but thankfully a moment later he began kissing back. Our tongues tangled as we messily kissed, my eyes fluttered closed simply basking in the kiss as he had stopped moving. He cupped my cheek as our lips moved against each others, our bodies pressed right up against each others.

When our lips pulled apart we spent a second looking at each other, him apparently shocked at this romantic gesture. Before anything could be said or done however he began thrusting again, knocking the voice out of me. Our foreheads were pressed together as he continued to thrust, me getting closer and closer to cumming but finding myself unable to tell him due to the fact that only moans were escaping my mouth. "I'm about to cum," he growled under his breath, apparently in his own world as he slammed into me sporadically, his eyes closed and clearly focussing on selfishly chasing his own.

Thankfully I was already on the verge, and my orgasm suddenly washed over me making me throw my head back into the pillow and dig my nails into his bare back. I was panting heavily, trying to recompose myself and moments later Sirius pulled out and came all over my stomach. It was then that I realised we weren't using protection, so I was glad he pulled out.

We spent a moment climbing down from our highs, him still holding himself above me. There wasn't too much room for two people to lay down side my side on the single beds we had in the dorms, so he instead sat up whilst we both registered the situation. "And to think I only came in for some rope," I tried to laugh off the awkward situation.

"Sorry (y/n), if you - er - felt forced-,"

"Sirius you're acting like I didn't enjoy it," I said and he glanced over to me. "I actually enjoyed it more than you think..."

"Huh?"

"I like you Sirius, as more than a friend," I decided to finally admit, thinking that if it wasn't said now things would just get messy. There was silence in the room where I couldn't bare looking at him knowing he was going to reject me despite what had just happened.

"Look at me and say that again," he demanded, shocking me slightly. I looked up at him to see a look of, dare I say, desperation in his eyes.

"I-I like you Sirius, as more than a friend," I repeated, and the smile that came to his face made my heart skip a beat. He leant in and pressed his lips up against mine passionately, me automatically kissing back.

"Finally," he sighed, smiling.

"You like me too?" I asked carefully and he laughed.

"Of course I do, I thought I'd been pretty obvious but perhaps you're just oblivious," he teased me and I hit his shoulder. "So, will you be my girlfriend?"

"Yeah Sirius, I will," I tried to hide my beam but he pulled me into another passionate kiss before taking me to the ensuite to get cleaned up. I changed into one of his tops whilst he only wore his sweatpants on my orders, the two of us then clambering into his bed and snuggling closely. We were both extremely tired and he was very comfy to cuddle against, so it wasn't long before I slipped into a deep sleep.

- Timeskip -

The sound of a door being slammed open woke Sirius and I with a start, the two of us turning to the door to see three very annoyed looking boys, all of whom were glaring at us. "Oh of course, she ran off to have sex with Padfoot," James rolled his eyes sarcastically.

"We were waiting for ages for that damn rope and you two were just in here fucking?!" Remus exclaimed.

"We ended up getting detention thanks to you!" James shouted.

"How on earth was you three getting detention my fault?!" I exclaimed, Sirius wrapping his arm around my waist to prevent me from jumping out of bed and storming up to James.

"Because we were sat there waiting for you to come back and you never showed!" Peter explained and I rolled my eyes.

"Then McGonagall ended up giving us detention! Haven't you wondered where we had been for the past three hours?" Remus asked with a huff.

"Sorry mate, we were kind of busy," Sirius said, kissing my cheek and James let out a big sigh.

"Well anyway, what's up with you two then, are you guys a thing?" James asked and I smiled at Sirius who nodded.

"Damn right we are," he said cheekily.

"About bloody time," Remus huffed again, clearly annoyed at me.

"Aw Rem, I'll make it up to you. How about a chocolate frog?" I suggested and this seemed to catch his attention.

"Make it two and you've got a deal," he said making everyone in the room laugh.

"Deal."