#knee thing

The one where everyone forgot his birthday, except his girlfriend.

Warnings: explicit smut, piv, grinding, riding, F! reader (Established Relationship), threatening y/n with a gun, switching between third and first person cause I'm lazy and don't want to change things, + Ignore any typos loll

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Spencer has had a long day at work. A difficult case that lasted a week in a different state, strenuous workload, and on top of it all, none of his coworkers remembered his birthday today. It was a rough day. As Spencer trudged up to his apartment door, he was completely unaware his girlfriend had an extra special surprise ready for when he walked through the door.

They aren’t living together, per se, but she does have a spare key for emergencies…and today seemed like a pretty big one. Spencer had called her on the phone, complaining about how his coworkers completely forgot his birthday. He understood, being the empathetic guys he is, but it still hurt her heart hearing the way he talked about being ignored. So, here she was now, holding a cake in her hands, confetti covering the floor, balloons bouncing off the ceiling, and standing in front of the door in his favorite lingerie set. The purple see-through dress one. Yeah, maybe it was pretty cliché, but she thought it'd make him happy.

As Spencer insert his key into the lock, he can hear muffled sounds coming from inside the apartment. He pauses, his brow furrowing in confusion. Not sure what to expect. Spencer grabs the gun in his holster just in case. As the door creeks open, Spencer points the gun at- his… girlfriend?? Spencer stops dead in his tracks, stunned by the sight in front of him. As soon as the door bursts open and the gun is pointed at her, she screams, almost dropping the cake in her hands. "STOP STOP DON’T SHOOT" Spencer looks utterly confused, and she hesitates before slowly and awkwardly speaking. "…h a p p y… b i r t h d a y…?"

Spencer lowers the gun, staring at his girlfriend in disbelief.… "Y/N… what are you doing here?! How’d you even get in here?" Spencer runs a hand over his face, clearly overwhelmed from the sudden surprise and lack of sleep. A small smile creeps onto her face, taking a deep breath and shaking her head. "I just saw my life flash before my eyes, Jesus…" She looks up, awkwardly smiling at him. "It’s your birthday! I had to do something to celebrate…and after this past week? …you deserve to celebrate something." Y/N pauses, hesitantly "But- I mean if you’re exhausted I can-" she set the cake down on the counter, grabbing balloons in case he wanted her to leave.

Spencer watches as his girlfriend hesitates, expecting him to reject the birthday surprise. He’s exhausted, yes, but seeing her efforts and the worry on her face makes him relax. He drops his gun on the table, his shoulders slumping slightly. Y/N is now holding a handful of Balloons when she turns to see her boyfriend slowly walking over. Did she cross a line with this little surprise she made?

Spencer looks at y/n, his expression softening. He doesn't say anything for a moment, just stands there taking in the sight of her in the lingerie set he loves, the confetti on the floor, and the cake she brought. Finally, after what feels like ages, he mumbles out her name. "y/n..."

Spencer stares in disbelief at the effort his girlfriend went through for his birthday. Despite his exhaustion, a small smile tugs at the corners of his mouth. Spencer's eyes roam over her figure, appreciating how much effort she put into everything. "Did you really think breaking and entering was the best way to surprise me?"

Y/N smiles, rolling her eyes, slowly letting go of the balloons, causing them to bounce against the ceiling. y/n takes a step forward towards her boyfriend. "Hey you gave me a key, so that's on you...plus, I really don’t think any breaking happened, just entering.." She steps into his personal space, wrapping her arms around the back of Spencer's neck with a soft smile. "I missed you…" she hums out.

Spencer chuckles softly as his girlfriend closes the distance between them. He breathes in her perfume, feeling his heart rate slowly returning to a normal pace. "You're lucky I didn't shoot you," he murmurs into her hair, partially to himself. He wraps his arms around her waist, holding her snugly against his chest. "I missed you too, y/n" he murmurs, pressing a gentle kiss to the top of her head. "How long have you been waiting here?"

y/n shuts her eyes as Spencer kissed her head. It was comforting, and she didn't feel as bad anymore. She smiled softly and let out a soft laugh. "I guess I am…" She sighed as Spencer moved to hold her closer, her chest against his. "Long enough…" she glanced up, kissing Spencer on his collar bone. It was 9:30 now, and she had 'broke in' to his apartment an hour earlier. She wasn't alone for too long, but still, she missed her boyfriend when he went on these week-long trips.

Y/N somehow stepped closer to Spencer, her body entirely pressed against his as she started leaving kisses around his neck and jawline. She normally wasn't so clingy, she just missed him. Bad. The day he left for that case, they were planning on spending the day together wrapped up in her bed. And then he got the call from Hotch. "Ugh I missed you so much you don't even know.." She mumbled out, hearing Spencer begin to laugh. It always made her day whenever she could make him laugh.

"Clearly" he teased, running his hands up and down her waist, before eventually leaning in, kissing her softly. Y/N smiled, quickly kissing back, butterflies finding their way to her stomach. They took a beat, pulling away from each other and looking into each other's eyes. They stood there, quietly in the center of the room, before Y/N quickly leaned back in, opening her mouth as she kissed him. Spence's eyes fluttered shut, following suit as his hands roamed further down her waist. Their tongues were quickly intertwining, making out intensely. Y/N let out a soft sighing noise as they kissed, arms still glued to the back of his neck.

As they French kissed, things became more...heated. Filled with more passion. y/n was moving her arms, gently pushing Spencer backward, taking small steps before they hit the couch in the living room. Now normally, Spencer liked routine and comfort, so more often than not the two of you would end up fucking on his bed. But, today was different...it was his birthday, and y/n wanted to spice things up...and Spencer was ok with that.

As they reached the couch, y/n broke the kiss for only a moment to shove Spencer. He landed on the couch, legs apart. Y/N looked down at him, seeing how flustered he seemed to be. She let out ragged breaths, smiling as she watched him. He looked desperate, and it drove her crazy. "You know...you look so cute like this..." She slowly moved onto the couch, straddling Spencer as his hands roamed over her body. Her shoulders. Her back. Her lower back. Her thighs..."Shut up..." He mumbled out, smile apparent on his face.

Y/n and Spencer quickly started to make out again, this time more messy, unorganized, and sloppy. y/n's hands slowly found their way to Spencers hair, gripping it gently. Spencer let out a whimper as she ran fingers through his hair, holding it gently. While they made out, y/n began rolling her hips against his. She blushed, continuing to kiss Spencer, only for him to make more noises, mumbling out sweet nothings. You sighed, continuing at a slow pace.

As you rolled your hips on top of him, you could feel how excited he was getting for this. It made you blush, pushing away from the kiss to start attacking his jawline. You could hear Spencer continue to let out noises, opening his mouth as he gasped. You tugged at his shirt, quickly trying to get him to remove his clothes. "Ugh why do you always have to wear so many layering pieces..." You mumbled against his jaw. He was the only person she knew that would wear a sweater vest, a dress shirt, a scarf, and a cardigan all for one outfit. It was really a pain when it came to getting undressed.

Spencer laughed, tossing his scarf aside, and trying to hurry to take off his cardigan. He looked at her, smiling."What? It's a crime now to look nice for work..?" Y/N rolled her eyes, helping him remove the cardigan and sweater vest. "It is when it takes a solid 10 minuets to get all your clothes off..." Spencer laughed softly, finding y/n's annoyance endearing.

Spencer gently held y/n's waist, looking her up and down and pursing his lips. He was starting to forget why today was even frustrating. "Hold on I've got you..." he spoke softly, carefully moving her off his lap to get up off the couch. Y/N turned around, looking up at him with a soft gaze. she watched as he removed his tie and started unbuttoning his dress shirt. For once in under 10 minuets, Spencer was undressed- at least the top half anyway. His chest was one of y/n's favorite features of Spencer- he was toned- not ripped, but muscular enough that you could see faint abs. He also had a happy trail, something you could only notice if you weren't staring at the soft v-line he had.

Y/N blushed, eyes glued to his body. She smiled, seeing him step closer to the couch and fidget with his belt buckle, his long slender fingers undoing his belt. "Wow..." She mumbled out, making Spencer laugh out of embarrassment. He knew she meant well, but having someone stare at his body always felt a little awkward. "Ok get it together..." He rolled his eyes, blushing, as he watched y/n laugh.

Y/N rolls her eyes, smirking as she reached her hands up, helping him undo his pants. They drop, surprisingly easy, and now Spencer was standing in front of her in his boxers. They both smiled, admiring each other, before Spencer leaned down to kiss you passionately. The moment was sweet, his hands coming up to cup the sides of your head, as he slowly stepped forward. You blushed, shutting your eyes and shifting so you could lay down on the couch. Spencer followed suit, trying not to break the kiss as he slowly climbed on top of you.

He was being careful, as the two of you started making out. One of his legs by your knee, the other slowly inching forward, hitting your core. You gasped, suddenly feeling his leg against you. You barely batted your eyes open, just briefly seeing the smirk crossing Spencer's face. You rolled your hips against his knee, trying to start some friction.

And it clearly worked. Y/N was whimpering, letting out mumbled noises as Spencer gently pushed his knee further up, giving her more to work with.

It didn't take long before y/n and Spencer were both fully undressed, rummaging in the couch cushions and pants pockets looking for a condom. They were...very careful about these kinds of things. "Oh! Yes!" y/n spoke, finally finding an un-open condom in the couch cushion. She bit her lip, smiling as she tossed it towards Spencer. He shifted off of her, rolling it onto himself quickly before turning back to face her.

He looked at his girlfriend, happy. The gory, difficult case long gone from his mind as he leaned back in for another kiss, this time sloppy, and unorganized. As they kissed, Spencers' hands found themselves gripping y/n's thighs, spreading her legs further apart, and pushing them up so he would have an easy entrance.

As y/n made out with Spencer, she heard a hissing noise Spencer let out. While she lay there, questioning what that noise and others could in-tale, something cut through her off. "Y/N? Did you hear me...?" She blinked rapidly, looking up at her boyfriend "hm? what was that?" "I said...are you...y'know...ok if I start..." Y/N's brows raised, a small smile growing on her face. "Oh! Yeah Yeah....I'm ok if you want to start" And there was a brief silence before she suddenly felt something thrusting into her. She gasped, squeezing her eyes shut, adjusting to this feeling. They both took a moment to collect themselves, until Spencer started going back and forth slowly- almost tortuous.

He heard y/n, and the noises coming from her mouth. She was blushing, her eyes shutting slowly. It made him pick up the pace, holding you close as your bodies moved together. Spencer leaned down, leaving kisses that slowly became hickeys across your neck. He always loved the way you looked during this...so...desperate.

It wasn’t perfect — there were tangled limbs, awkward angles, and an uncomfortable couch beneath them. But for right now, after a week of not seeing each other, this moment is all they needed.

It didn't too take long before Spencer started speeding, letting out soft whimpers and quiet moans into the nape of your neck, where his head lay. His eyes were shut now, and his brows furrowed, a crinkle appearing across the bridge of his nose, showing his age just the slightest bit.

And y/n? She was a mess. She was gripping onto his shoulders, letting out noises she didn't care if the neighbors heard. She could tell Spencer was getting closer, and she suddenly started shoving Spencer's shoulders, mumbling soft words out. "Wait...Wait Spence.."

Spencer groaned, slowly and somewhat reluctantly batting his eyes open, though there was no malice or annoyance behind them. What was apparent was his concern. He sighed, almost stuttering through his sentence. "w-what..? Are you okay...? A-Am I doing...o-okay...?" Y/N is somewhat surprised, until putting it together that Spence clearly thought he hurt her.

Y/N shook her head quickly "no! Oh my god no- no it's just..." She trailed off. Eyes slinking away from his, smiling awkwardly. "I um...I wanted to try something...new? Kind of...as another birthday present..." She slowly turned her gaze back towards his, ands immediately saw how flustered he look, a faint pink blush apparent on his face. "Really...?"

You smile, letting out an airy laugh, as you kiss him quickly on the nose, the kisses slowly trailing further across his face. His forehead. His cheek. All the way to his ear, where you started to whisper something dirty. Spencer's eyebrows slowly raised higher on his forehead, his expression blank and shocked. He pulled away to look you in the eyes.

"Really? You're sure you wanna try it out...?" And all you did was smile, nodding and taking a beat before as you leaned in to kiss Spencer on the lips. They continued to kiss, slowly turning into making out as their tongues danced across one anothers. Spencer's hands slinked toward her hips, and Y/N's to his shoulders. Almost as soon as they held onto each other, Spencer rolled them, flipping the two so Y/N was now on top.

Finally, when Y/N was on top, the kiss broke. She slowly sat up, knees on either side of Spencer's hips. She watched as his loose curls fell in his face, and he looked up at his girlfriend in disbelief, a dopey smile crossing his face. And before Spencer could even get a word out, Y/N smirked, and spoke up as she slowly shook her head. "Shut up" and all Spencer could do was laugh. She knew him too well.

Your hands slowly found their way to his waist, and there was an awkward moment. You had never really...'rode' Spencer before, per se, but you wanted this Birthday to be memorable for him. "Let me know if this hurts.." You spoke up, just in case. When you got the nod of approval from Spencer, y/n slowly started rolling her hips, watching for any reaction Spencer could possibly give her.

It took some time adjusting to being on top for y/n, but as soon as she found her rhythm, she kept with the pace, focusing on her boyfriend. And was that a good decision. His head was throw back, clearly already close to the edge. He bit his lip, whimpering as his eyes glued shut. It just made you smile. y/n let out sighs and quiet moans, hands moving further up Spencer's chest, keeping her balance on top.

Spencer grunted, hips twitching the slightest bit. "s-shit..." he mumbled out, his arms quickly coming up to grab your hips, keeping you in place. For once in his life, he couldn't form a single coherent thought. The two of you mumbled out strings of noises, both so close to being pushed over the edge. You quickly gasped, head falling back as he started thrusting upwards into you at a quick, uneven pace.

You let out a somewhat loud moan, not used to this new angle for the both of you. You quickly picked up the pace, moving and rolling your hips with purpose. The apartment was filmed with noises, and the sound of squeaking furniture. You could feeling the heat in your stomach growing, making you bit your lip.

"shit fuck oh- ugh shit shit shit" Spencer, someone you rarely heard swear, couldn't stop cursing, the words rolling off his lips with ease. His eyes were glued shut and he grit his teeth as he froze deep inside you. He finally finished, with one last somewhat weak thrust inside you. You gasped, knowing you'd be following suit in just a matter of time. You continued bounce on top of him and roll your hips, hearing Spencer mumble and groan.

Spencer sighs, body relaxing, muscles not tense anymore. The heat in Y/N's stomach slowly becomes too much. Her legs shake just the slightest bit, keeping Spencer in place with her thighs. As more noises escape her, she throws her head back, finally coming not far behind Spencer. As y/n climaxes, she arches her back, groaning loudly. "Oh...Spencer! Oh my god..."

For a long moment afterward, the only sound in the room was your ragged breathing and the pounding of your hearts. y/n smiled, slowly getting off of his hips, and laying down comfortably next to him. running fingers through his hair, brushing away some loose strands.

"Happy Birthday, Spencer" y/n mumbled softly.

In this moment, Spencer truly felt loved. He sighed, laying his head against hers, the two of them intertwined like this for what felt like ages. Normally, he didn't like to acknowledge his birthday- didn't want to celebrate it. But today...being here with you...may have just changed his mind for the better.

The pair cuddle on the couch, falling asleep on one another. They stay like this- comfortable and safe, for a half hour. But, eventually the drooling and heat from their bodies pressed together became too much, and the pair finally left the couch, clothes coming back on.

Y/N trudges over to the kitchen, still exhausted from their session, but just enough energy to do one last important thing. Spencer followed suit, sitting in front of the kitchen counter on a stool. "Alright shut your eyes Spence..." Spencer smiled, quickly obliging. The light behind his eyelids dimmed, clearly indicating y/n was shutting the lights off.

"Happy Birthday to you, Happy Birthday to you! Happy Birthday dear Spencer, happy Birthday to you!"

Spencer's eyes slowly peaked open, almost immediately grinning as he saw the '30' candles in front of him, on a chocolate cake. "Make a wish babe!" y/n smiled softly at Spencer, radiating excitement from her side of the counter. She was so pretty. Spencer just admired her, seeing the candles accentuate all her features. Spencer blushed softly, all of a sudden acting like a sap. He felt a need to fill the silence, suddenly speaking up. "Y'know...The tradition of birthday celebrations with cakes and candles is thought to have roots in ancient Greek culture, where moon-shaped cakes were offered-"

"Alright Alright cmon don't let the wax get all over the cake.." y/n felt a little bad cutting him off, but she knew how this usually started. He'd feel awkward or overwhelmed, tell her a fun fact, and ramble for ages. It's not that she didn't like that about him, but she really wanted to have a slice of cake with her boyfriend. Spencer smiled softly, shaking his head. "Ok I know I know..." He laughs breathlessly, glancing up at the woman he loves, before blowing out the candles.

Y/N cheered, setting the cake down to grab a knife and two plates. "What'd you wish for babe?" y/n spoke, back turned to Spencer. In all honesty, he had wished he could marry her. But he wouldn't say that out loud. At least not now. Not when they've only dated for only so long.

"um actually...there is a germanic tradition of a candle-adorned birthday cake, known as Kinderfest... The wish was to be kept private, and if the birthday person blew out all the candles in a single breath, their wish would be granted...." he paused, a grin forming across his face. "So, long answer short, no, I am not telling you- ...in your dreams!"

Y/N laughed, bringing two pieces of cake over, setting one down in front of Spencer. She sat next to him on another stool, and she nudged Spencer, slowly beginning to eat the cake. "Ok whatever you say Spencer..." She looked at him, taking a bite of the cake with a smile.

Best. Birthday. Ever.

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BONUS:

The team had forgot his birthday. Quite literally until everyone went their separate ways for the weekend. Garcia was at home, baking when she suddenly remembered, calling up Derek. They needed to do something before it was too late! Spencer was turning 30, after all. That is a big birthday to miss. Derek and Garcia threw on party hats, driving over to his apartment, with freshly baked cookies in Tupperware being held by Garcia.

Man they felt so bad- their pretty boy shouldn't have to spend his birthday alone! They hurried up to his floor, preparing to knock on his door until- they realized someone apparently felt the same way as them. All that could be heard from the other side of the door was moaning- a woman moaning, more specifically. The faint sound of furniture shifting back and forth...back and forth...back and- Derek and Garcia looked at each other, genuinely shocked.

Did Spencer have...a woman over right now?? They heard a loud groan from inside the room, and their eyes went wide. Derek let out a shocked laugh, as Garcia hurried over to Derek, gently pushing him away from the door. "Go! Go! Go!" Dereks laugh only grew as they hurried down the stairs, trying to give their friend space. Derek would not forget to bring this up Monday.

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