Warning! This is a lemon, so there'll be sexual content!

Note: This is a Christmas special.

House: Hufflepuff

 I couldn't quite believe I had bought this outfit as I stood in front of the mirror in our shared bedroom, staring at myself through my fingers. It had been six months since Sirius and I had bought a flat together, us having been together for almost three years. It was approaching our first Christmas living together, and I wanted to make the occasion very special so I decided to branch out. I ended up buying a particular kind of outfit.

It was a sexy red velvet very short dress, it barely covering my bum. It showed plenty of my cleavage too, and there was white fur lining the edges of the skirt. It came with white fluffy cuffs that went around my wrists, and a red velvet Christmas hat with a large white pompom. I was also wearing a very small red thong, and no bra. I felt completely exposed, and questioned why I had even bought such a thing.

My plan was to surprise Sirius with it on Christmas Day, and tease him saying something along the lines of 'you have one more present left to unwrap' but I was having second doubts. Currently Sirius was out, doing some very last minute Christmas shopping as it was the day before Christmas Eve but it gave me plenty of time to assess the outfit. I wondered about whether or not to even go ahead with it, knowing that when it'd come to I'd be too embarrassed to even say anything. My heart stopped however when I heard the front door open.

"(y/n)! I'm back!" Sirius called out through our small house and I panicked, looking for a place to hide despite knowing there was nowhere. I didn't expect him to be back so soon given the fact he had a hell of a lot of shopping to do, but here he was. I could hear his footsteps ascending our creaking stairs. "(y/n)?" He called out again, his voice too close for comfort and I let out a squeak when the door to our bedroom opened. "There you are..." his eyes widened when he took into account what I was wearing, a lustful smirk appearing on his face.

"D-don't look!" I exclaimed, fruitlessly attempting to cover my body.

"Now why would you buy something like that if you didn't want me to look?" He questioned, stepping closer to me. Heat was rushing to my cheeks knowing he was right, I did buy it because I was feeling daring but now I wasn't so sure.

"It's embarrassing," I muttered, trying to avoid eye contact with him but he turned my head to face him again.

"Embarrassing? I don't think so. (y/n), you look incredibly hot," he praised, this compliment somehow embarrassing me more. I hid my head in his chest, him wrapping his arms around me. "Do I get this early Christmas present then?"

"I-I did plan to save it until Christmas..." I admitted.

"Well you've already started something, so you need to take responsibility," he said, pulling away from me and gesturing down. My eyes widened upon seeing his erection, and just a second later he pulled me in for a passionate kiss which I happily reciprocated. "You're so hot," he praised, his hands running all over my body. I let out a whimper at the feeling, him knowing exactly how to turn me on.

He pressed his body right up against mine, me feeling all of him, even through his trousers. Feeling him having gotten this way after seeing me in this outfit alone gave me a little bit more confidence in myself, so when he pushed me back onto the bed I rolled him over and straddled his waist, laying on top of him and leading the kiss. This was something I rarely did as he was the one who was usually dominant, so he seemed shocked by my advance. This gave me the chance to control the kiss, me turning it slow and sensual to make it more romantic.

"I ideally wanted to save this outfit for our first Christmas Day alone together," I admitted sheepishly when I pulled away, but the mischievous smirk he wore told me he was going to make use of the outfit now.

"Sorry but I don't think I can turn back now," he said, his hands on my waist and his crotch grinding against mine, making me whimper slightly. I clutched onto the bedsheets either side of his head whilst we kissed once more, our tongues brushing up against each other's. He was still moving his body against mine despite being underneath me, however I wanted to take charge like I had planned to so I built up every ounce of confidence I had and pulled away from him, standing up and leaving him on the bed. He looked somewhat lost without me on top of him which made me giggle.

"I-I want you to consider this an early Christmas present," I mumbled, trying to keep eye contact with him. He smiled wickedly, sitting up on the bed. "I want to treat you..." I added, getting onto my knees and unbuttoning his jeans. I pulled them open, then pulling his erection from the confines of his boxers, surprised to see just how keen he was. There was even a slight trace of pre-cum leaking from the tip.

I took ahold of his member, squeezing it a little in my hand before moving it up and down. I knew that he liked it starting slow and getting slightly faster, as I had done this many times before. He was grunting slightly above me, encouraging me to put him in my mouth so I did exactly that, wrapping my lips around his tip. Gently I licked the underside of his member, not taking him in his entirety just yet - I wanted to tease him first.

He placed his hand on the back of my head but he never pushed me down as he didn't want to force me to take more when I possibly wasn't ready to. Sirius may have appeared like the bad boy, but he was truly caring for those he loved at heart, this care stretching to even our intimate moments. "(y/n), that feels good," he groaned, his grip scrunching my Christmas hat slightly.

I took more and more of him in my mouth, him apparently unable to get enough. I continued moving my tongue the way I was, but I continued to take more and more of him in my mouth. Suddenly however he pulled me off of him, and I looked up to see his slightly red face, his chest rising and falling quickly. "Is everything okay?" I asked innocently.

"Everything's fine, I just don't want to cum too quickly," he said and my eyes widened, not realising I was making him feel that good already. "C'mon," he moved the two of us so I was laid on the bed, him on top of me and kissing at my cleavage. I let out a moan, my nipples erect with eagerness but his attention moved south of them. His hands ran down to my thighs, them then working their way under my skirt and towards my thong-covered womanhood. I couldn't help but moan when his fingers came into contact, him immediately pulling aside my thong and brushing his fingers against my wet heat.

"Sirius," I breathed out as he continued his actions, my eyes fluttering closed as I basked in the pleasure.

"You look so hot in that outfit," he praised making my cheeks heat up, feeling both complimented and embarrassed. I felt his lips press against the fabric that was wrapped tightly around my body, them working their way down until he pressed them against my inner thigh. Having my eyes closed meant that the pleasure was intensified, and it felt incredible when he slowly kissed my sensitive skin all the way up to my womanhood.

When his lips came into contact with my lower ones I couldn't help but gasp out. The feeling was intense as his tongue licked up all my juices, his thumb teasing my clit also. I placed my hand on the back of his head, scrunching up his black slightly curly locks, panting heavily as he continued to lick at my womanhood. "S-Sirius," I breathed heavily, him knowing exactly how to get me close to my release. I was trying to hold on, desperately so seeing as he hadn't cum yet either. I let out gasped breaths, until I couldn't take it anymore and had to pull him away. "I want to treat you," I said, turning him over onto his back.

He watched with wide eyes as I straddled him, lifting up the very short skirt for him to see everything as I began to move my womanhood against his dick, having not entered him yet. He let out a few grunts as I moved my hips back and forth, the tip of his dick hitting my clit repeatedly. Sirius' eyes were wide as he watched me move back and forth along his member, his grip on my thighs being tight. Before they started to ache however I wanted to ride him, so I knelt up and lined his member with my entrance before slowly lowering myself.

As I was on contraception we didn't need to use a condom, it feeling utterly incredible without one. He was about seven inches and filled me to the brim, the tip of his member already pressing against my g-spot. I had to pause for a moment to try and catch my breath, but seeing him try to hide his desperation was enough encouragement, and I immediately began bouncing up and down.

Due to our positioning, his member was hitting deep inside of me. He was grunting below me, me having forgotten how much I enjoyed being on top as it was usually him that took charge. "S-Sirius- Sirius!" I moaned loudly, then letting out a squeak when he slapped my thigh.

"You look so hot (y/n)," he growled, his eyes soaking up my body and my outfit. He thrusted his hips up a little, helping me bounce up and down so that I didn't have to do it all by myself. Hearing him talk dirty was so hot, and feeling him reaching behind me to slap my bum sent shivers down my spine. I was a panting, moaning mess who tried to keep up consistency in moving, but I was becoming too weak as pleasure overtook my body.

In a matter of seconds Sirius moved me so that I was on the bed and he was spooning me, slamming back into my womanhood roughly. He held my top leg up, his other arm holding me steady as he fucked me in this position. I looked back at him, his gritted teeth and slightly sweaty forehead making him look incredibly hot. I could barely believe that the Sirius Black was my boyfriend.

Sirius pressed his lips against my neck, sucking at it as he moved. He definitely knew his way around my body, him immediately finding my weak spot on my neck and taking advantage of it. I whimpered and moaned at the amount of pleasure he was dealing me but what made it even better was the fact he seemed just as desperate and excited as I was.

Soon he rolled me onto my front, him on top of me and slamming into me from behind. It was a slow and sensual pace, but my sensitive womanhood still felt immensely good from it. I gripped onto the pillows in front of me, having to bite them as my orgasm etched closer and closer. I announced this fact to Sirius who suddenly picked up the pace, sending me slightly insane. Sweat broke on my forehead as I buried my face in the pillow to muffle my loud moans as I came all over his dick.

"You're tightening- (y/n)," he growled, slamming into me even harder so that the sound of skin-slapping reverberated around the room. My womanhood entered overdrive, beginning to get overstimulated by Sirius and the fact he was still moving, trying to chase down his orgasm. "I need to see you," he suddenly pulled out of me, giving me a mere second to breathe before he had me in missionary, entering my over-sensitive womanhood again.

"S-Sirius!" I just about managed to cry out but it was no use, his lustful dark eyes soaked up the outfit I was wearing for him, as well as the cleavage that was poking out the top rim. The headboard of the bed repeatedly hit the wall as he continued moving, but judging by the way his face scrunched up he was seconds away from cumming.

"(y/n)!" He cried out loudly, throwing his head back and thrusting in one last time, even deeper than before. I felt his cum leak inside of me, the feeling making my whole body tremble. My fingernails were digging into his back as he continued to cum, there being so much that some actually leaked from my womanhood despite him still being lodged inside of me. "That felt good," he groaned, his voice deeper than usual.

I was panting a little but nodded in agreement, him then pulling out and laying beside me. "We probably ought to tidy ourselves up," I said, despite not having the energy to do so.

"Maybe later... right now I just wanna lay here with you," he whispered, pulling me closer to his naked body. I felt my cheeks heat up but happily did so, although the two of us soon got cold and had to get in the shower together to warm up. We couldn't stop ourselves from making out in the shower, but we were both too tired to do anything more. Instead the idea of cuddling in our shared bed sounded the most appealing option, so we dried each other off and headed towards it. "So what made you buy that then?" Sirius asked in a teasing voice as the two of us settled into bed, him pulling me close to his body.

"Well we've... never done anything with outfits before so I... thought maybe we could try... and it seemed like the perfect occasion to," I mumbled, twiddling my fingers together.

"I'm glad you did because that was incredibly sexy," he praised, making my cheeks heat up.

"It was?" I checked I had heard him right and he chuckled, nodding.

"Of course it was. We need to get more outfits like that," he said, leaning in and kissing me passionately. I was relieved that it wasn't a waste of money, and it didn't take long for Sirius to suggest going to the adult store together to buy more than just outfits for the bedroom. I had awoken a seemingly sexual beast inside of him.