THE PROPOSITION

Author's Note: Hello! Sorry this update took a while. I always find it hard to write these kinds of things, and since I had to throw in emotions into the smut-mix, it proved to be a more daunting task than I had expected. First time to write a scene like this, so I hope y'all will like it.

Warnings: Sex and a threesome; blow job, rimming, and very light D/s subtext thrown in.

Disclaimer: I don't own Glee, Ryan Murphy does. If I did, I'd make Kurt and Sebastian fall in love with each other and do very dirty things to each other every episode (and maybe throw in some Blaine into the mix too). I'm not making any money off of this either. If you sue me, you'll be sorely disappointed since I'm broke. :D

KSKSKSKSKSKSKSKSKSKS

Sebastian led Kurt and Blaine into his two-story brownstone and tossed his keys into the small bowl that was on a table beside the coat rack.

"Make yourselves at home," Sebastian said to Kurt and Blaine as he took his jacket off, signaling the couple to do the same. "Would you like beer or wine?" he offered as he glanced at Kurt, who seemed to pale with every minute that passed. "Or maybe something way stronger to take the edge off?" he bit out, humor coloring his voice to mask the concern that wanted to bleed out.

Blaine seemed to have caught on as he followed Sebastian's gaze. "Maybe some wine?" he replied with a smile at the tall boy. Sebastian gave him a nod and motioned towards the overstuffed leather couch in the living room.

"Please, make yourselves comfortable. I'll be back in a bit," he said before disappearing into the kitchen. He walked over to the cupboard to get the Pinot Noir he had opened the night before. He got three stemless wineglasses from his glass cabinet and went back to the living room to see Kurt and Blaine sitting close to one another. Sebastian kept silent and watched the couple interact.

Kurt had his face buried against Blaine's neck, like he was embarrassed about something or another. Blaine had an arm around Kurt's shoulder and he was whispering something inaudible against Kurt's hair as he gently – soothingly – rubbed his hand up and down his fiancé's arm. It was an adorably sweet scene. Normally, Sebastian would make fun of any couple he would have the misfortune of catching in this state, but he didn't find this sight revolting in any way.

Something funny fluttered through Sebastian's stomach as he watched the couple for a few more seconds. He knew what the feeling was, but he pushed it down. He didn't have the courage to voice anything out. Not yet, anyway. This was an opportunity to be with both men and Sebastian was not going to throw that away just because of an irrational feeling he was having.

If only he could believe that his feelings were truly irrational.

He cleared his throat and smirked at the couple when they looked his way at the same time. He approached Kurt and Blaine and sat on the chair beside the couch. He placed the glasses on the coffee table and started pouring each of them a good bit of wine. He handed the two a glass each as Blaine whispered something into the Kurt's ear. The brunet-haired boy nodded minutely as he accepted the glass. Sebastian watched Kurt smile bashfully at Blaine before he turned his attention towards Sebastian.

"Thank you," Kurt murmured shyly. Sebastian threw him a small smile of his own and raised his own glass to acknowledge the thanks.

"So, how do you want to do this?" Sebastian asked the couple as he observed the two. He chuckled softly when Kurt started blushing in response to his question. "Oh Kurt. Are you sure you're up for the proposal you threw my way? You're blushing harder than any virgin I've ever fucked, that's for sure," he teased in a good-natured way. He was surprised when Kurt cast him a bitch-glare that could end all bitch-glares. Apparently, his teasing was not taken lightly – again.

"Just because you're used to plunging your cock into different holes each night doesn't mean that everyone's comfortable with the same idea," Kurt spat venomously. He was about to say something else, but seemed to have calmed immediately when Blaine placed a hand on his lower back and started tracing slow circles on it. Sebastian took that information in and stashed it for future use somewhere in his brain.

Blaine faced Kurt, "Kurt, come on, I'm sure Sebastian didn't mean it that way," the man soothed, but Kurt was still bristling.

Sebastian decided to tone his teasing down and change his approach. Clearly the over-confident Casanova act was not earning him any points with the feisty brunet. He softened his smile and injected as much sincerity in his voice as he could without sounding fake. He couldn't risk Kurt backing out of this agreement. It was his only chance to win the man over. "I apologize if you thought I was trying to get on your nerves again, Kurt. Believe me, that wasn't my intention."

Kurt eyed him suspiciously when Sebastian went silent, as if waiting for the other shoe to fall. Sebastian gave him a mischievous smirk. "What I meant was – and this is quite similar to what I told Blaine about his innocent schoolboy act – the blushing virgin look is super hot on you, Kurt," he added cheekily. His smirk turned into a gleeful grin when Kurt blushed more furiously and ended up finishing his wine all of a sudden. Sebastian followed suit and polished off his own glass before standing and walking over to where Kurt was seated. He extended his hand towards Kurt and smiled at the boy.

"Come on, let's go to my bedroom," he offered quietly. He waited patiently as Kurt eyed his hand and his face for a minute. When Kurt turned his attention to Sebastian's eyes, the taller boy held the stare for as long as he could so Kurt would know he wasn't mocking him.

Kurt placed his hand in Sebastian's and gripped it firmly before standing. Sebastian cheered inwardly at the feel of Kurt's hand in his. He looked at Blaine who then stood and motioned for him to lead the way.

Without letting go of Kurt's hand, Sebastian walked to where the stairs where and started climbing the steps, never letting go of Kurt's hand as he did so. He led them to his room and only when they were all inside did he let go of Kurt's hand so he could close the door. He faced the couple and started walking towards them confidently.

"I'm going to be completely honest, boys. I had never participated in a threesome either. I guess this is a first that we can all share," Sebastian purred as he approached the two. Sebastian found himself staring into wide, amber eyes to his right and an even wider pair of cerulean eyes to his left. The closer he got to the couple, the wider their eyes seemed to get. Sebastian would have laughed at how the pair looked if he didn't find the situation extremely hot and enticing. He stopped walking when he was half a foot away from Kurt and Blaine and he could practically feel the heat emanating from their bodies. Sebastian smirked and placed a hand on each of their shoulders before drawing them closer until there wasn't any space between them. He wrapped his hands on their napes and leaned down until his lips were almost touching their ears. He could feel their breaths quicken and it made Sebastian smile all the more.

"Relax, boys. I'll make sure this is going to be a night you both will never –" Sebastian started to whisper, but he stopped to lean closer and brushed the tip of his nose against the shell of Blaine's ear. Blaine was barely able to contain the moan that escaped his lips and it made Sebastian smile.

"Ever –" Sebastian paused again and licked the shell of Kurt's ear. The gasp that ran past Kurt's lips made his smile turn into a grin.

"Forget," he finished and pulled Kurt closer to him. He pressed his lips against Kurt's in a passionate kiss and waited until Kurt's initial shock wore off. When it did, Sebastian couldn't help but smile inwardly when the blue-eyed boy melted against Sebastian and he moaned into his mouth. Sebastian took that as his opportunity to plunge his tongue into Kurt's mouth. He mapped out Kurt's mouth with his tongue, tasting coffee and wine and Kurt.

Sebastian pulled away from Kurt and faced Blaine who was staring at them with a combination of lust and heat in his eyes. Sebastian leaned down and captured Blaine's lips this time, kissing him with just as much fervor as he did Kurt. Where Kurt was responsive, Blaine was aggressive. Blaine didn't waste a single second in pushing against Sebastian and kissing him back so fiercely, Sebastian thought he would run out of breath. He felt a hand massaging his scalp slowly and he moaned into Blaine's mouth. He pulled away after a few more seconds and tried to catch his breath.

Sebastian stared at the couple in front of him and he felt his cock twitch and get harder than it already was. Both had lust-blown eyes and kiss-swollen lips. They were both staring and clinging against him like he was a god. And that turned him on all the more. Kurt started kissing down his jaw to his neck while Blaine started mouthing at his collarbone. The combined act made Sebastian gasp loudly and he took hold of both their hips in a bruising grip.

"Whoa, whoa…hang on you two…I want to try something with both of you first," he whispered as he tried to push the couple off of him a bit. He wanted – no, needed to cool down or this would be over way too soon.

Kurt and Blaine complied, albeit begrudgingly, it seems. Sebastian eyed the two hungrily when there was enough space between them and smirked as he stripped his shirt off in one, swift movement. Kurt and Blaine had a hunger and fire in their eyes that made Sebastian's cock twitch inside his jeans some more.

"I want to watch you two together."

KSBKSBKSBKSBKSBKSBKSBKSBKSBKSB

Kurt's eyes widened at what Sebastian said and he could feel heat course through his entire body. He bit his lip and eyed Sebastian, cocking his head to the side as if in consideration of what Sebastian had suggested. He bit his lip and smiled sexily at Sebastian before turning to face Blaine, who was already eyeing him hungrily. Their lips met in a hot, searing kiss and they started undressing each other slowly, almost never letting go of each other's lips.

Blaine's hand caressed every inch of skin that got exposed as he stripped off each article of clothing he had. His tongue traced a path from Kurt's lips to his jaw, down to his neck, sucking a dark red mark onto his fiancé's pale skin, which caused the brunet to let out a deep, guttural moan that went straight to both Blaine's and Sebastian's cocks.

The noises that were coming out of Kurt's mouth were more erotic than anything else Sebastian had ever heard and for a quick moment, he felt insanely jealous that Blaine got to hear those sounds all the time. He quickly shook the feeling off as he removed his pants. He smirked at the couple in front of him even if they were both not giving him any attention. He was hearing those sounds now, and he'd have the chance to hear and experience more, not just with Kurt, but also with Blaine. Sebastian literally felt like he had won some sort of sex lottery. He took his boxer briefs off and sighed in relief when he got rid of the offending garment.

Blaine was pushing Kurt to lie on Sebastian's queen-sized bed now as he continued to lick and suck at every inch of skin he could reach. He dropped open-mouthed kisses onto Kurt's chest and licked from his collarbone to his right nipple. He heard a gasp escape Kurt's lips and he lightly grazed his teeth on the taut nub before licking and sucking on it. Kurt mewled at the sound and grasped Blaine's head to pull him closer, silently asking for Blaine to not stop. The curly-haired man reached up and started rotating Kurt's other nipple with his thumb before rolling the nub between his fingers, causing Kurt to groan deeply. He arched his back and pulled Blaine impossibly closer, his entire body consumed by passion and lust. Blaine gave the same attention to Kurt's other nipple, and Kurt looked completely lost in the heat of it all.

It was amazing what the thought of Sebastian watching them go through the motions of foreplay was doing to their libido. Kurt felt like he was on fire even if what he and Blaine were doing was no different than how they would usually start off when they were to have sex. He turned his head to the side and saw Sebastian standing by the bed, stroking his shaft slowly, lazily. Kurt's breath hitched when their eyes met and he saw the lust in those fiery emerald eyes he used to hate seeing so much. Sebastian's irises have practically disappeared with how blown his pupils were and he was licking his lips as he tried to control his breathing. Kurt smirked at him and extended a hand in invitation. That was – after all – what they were in Sebastian's room for.

Kurt heard the low growl that seemed to have emanated from Sebastian's chest as he stalked towards the bed. He watched as he grabbed Blaine by the hair and pulled him off of Kurt's chest, only to capture those severely swollen lips into a kiss so hot, it made Blaine grab Sebastian's bicep to ground himself. Kurt bit his lower lip at the sight until Sebastian let go of his fiancé's lips before turning his attention on Kurt.

"I want to watch Blaine blow you," Sebastian growled. He kissed Kurt as he lightly ran a finger along Kurt's length, making the man shiver underneath him. He ended the kiss and took a pillow from beside Kurt's head and handed it to Blaine who had positioned himself beside Kurt's hip. He eyed the pillow Sebastian handed him, and then looked at the taller man questioningly. Sebastian merely smirked at him before positioning himself between Kurt's legs and raising those porcelain hips a little. Blaine got the idea and placed the pillow under Kurt's hips. Sebastian grabbed Blaine's head and kissed him again before pushing his head down to Kurt's erection.

Blaine didn't waste any time in engulfing Kurt's length with his mouth, bobbing up and down a couple of times before letting go and licking the shaft like it was a popsicle. Precum was building on Kurt's tip and he made sure to collect the liquid on his tongue. The head of Kurt's cock was very sensitive and his non-stop attention on that part of his fiancé's anatomy made the man look like he was going to go insane with want.

And Kurt really did feel like he was going to go crazy. Blaine's ministrations combined with Sebastian's heated stare was enough to make him want to self-combust. He never thought that this fantasy would prove to be hotter than he had ever imagined it would be. He was whining and writhing as Blaine sucked his cock expertly. He was enjoying the attention when he felt fingers parting his ass cheeks. His eyes popped open (when did they even close?) when he felt a warm tongue circling his opening. The action pulled a deep, guttural groan from his chest. The tongue kept licking him open and his entire body trembled at the intensity of the combined blow and rim jobs he was getting from two of the hottest men he had ever known. Granted, he used to make fun of Sebastian's meerkat-ish features and his horse teeth, but he never denied the fact that the man was extremely attractive and had the sex appeal of an underwear model.

Kurt was so caught up in the attention he was getting from Blaine and Sebastian that he barely registered the finger that had joined Sebastian's tongue inside him. He gasped at the intrusion, which quickly turned to a whine. His hips took a mind of its own and bucked upwards, but the action was stopped immediately by Blaine's hands as his fiancé pushed his hips down firmly on the bed. The act only made Kurt more desperate.

Sebastian stopped licking Kurt open and sat up to put lube on his fingers. He had never wanted anyone as much as he wanted both men at that moment. He pushed two fingers into Kurt and almost went insane when he felt the heat, warmth, and tightness envelope his fingers. He started moving his fingers in and out as he watched Blaine suck Kurt off like he was born to suck cock.

An idea popped into Sebastian's head and he stopped pushing his fingers into Kurt.

Sebastian leaned over so his face was close to Blaine's. "Blaine, finger yourself," he murmured hotly into Blaine's ear. "I want you to finger yourself, and then I want you to ride Kurt like your fucking life depended on it.

Blaine let go of Kurt's cock with a soft pop, which made Kurt whine at the loss. There was a mischievous glint in Blaine's eyes as he took the lube from where Sebastian had tossed them. He slicked three fingers as he positioned himself beside Kurt on the bed, legs spread open as if he was serving himself up to Sebastian.

Sebastian had to swallow hard to prevent himself from diving for Blaine's cock right then and sucking him off until he came. Instead, he continued opening Kurt up, matching the movement of his fingers with Blaine's.

Kurt watched as Blaine fingered himself in front of Sebastian as the taller man watched hungrily while he continued stretching Kurt. Kurt couldn't help the whines and moans and whimpers that escaped his mouth, but the sight of Sebastian riveted by the erotic scene Blaine is painting for him caused a light pang of jealousy to hit his chest. He pushed the thought aside and concentrated hard on the fingers that were inside him, opening him up.

After what felt like eternity, Sebastian removed his fingers from Kurt, earning him a pained whimper from the pale boy on his bed. He motioned for Blaine to stop and handed him a condom. The curly-haired man ripped the wrapper open with his teeth and rolled it onto Kurt's length. Sebastian got another and rolled it on his. He grabbed Blaine by the hair and kissed him again.

"Ride Kurt, Blaine. I want to see you ride your fiancé," he whispered against the man's lips.

Blaine ran his tongue across Sebastian's lower lip and smirked before pulling away and positioning himself on Kurt. He lowered himself slowly, holding onto Kurt's erection as he aligned Kurt to his opening. He heard Kurt's moan and felt Kurt's fingers on his hips, guiding him down. As soon as Kurt breached his opening, he let out a low moan and continued pushing down until Kurt was inside him completely. He stopped to allow himself to adjust, but felt a jolt from behind and Kurt let out a loud gasp.

Sebastian had entered Kurt.

Blaine felt a surge of possessiveness course through him when the realization hit him, but he pushed it aside. He wanted this. Hell, he was the one who pushed Kurt to allow Sebastian to be the third person in their private fantasy. He was the one who opened the door to let Sebastian into their sex life. He had no right to feel possessive when he had his fiancé's cock deep in his ass even if Sebastian's cock was inside Kurt's. Instead of wallowing in that emotion and risk losing his erection, Blaine started moving; rocking himself back and forth until he could see beads of sweat form on Kurt's hairline and his upper lip. Once he knew Kurt was about to lose control, he started riding Kurt's erection, slowly at first, but with his speed picking up with each movement.

Kurt felt powerless underneath these two men who were taking pleasure in his body. It felt like they were just taking and taking, without any thought of giving back anything. He knew that was the furthest thing from the truth, but somehow he felt his cock twitch and harden further inside Blaine at the thought of being used like a sex toy by both men. And for a man who wanted to be in control of his entire life since he was a child, the thought was scary and liberating at the same time.

Kurt was already at the brink of ecstasy, and the thought of being used the way the two men seemed to be doing caused Kurt to suddenly let go with a shout. His hips stuttered upward, forcing Blaine to bounce on his lap. He grabbed his fiancé's cock and started pumping it quickly until Blaine came with a loud, raspy shout. He had come and was now extremely sensitive, but he wasn't done yet.

Sebastian was still pushing into him relentlessly.

Sebastian coaxed Blaine to roll off of Kurt, which the man obliged to willingly. As soon as Blaine was out of the way, he pushed Kurt's legs up and settled them on his shoulders, changing the angle of his thrusts completely so he was hitting Kurt's prostate with every thrust. He heard Kurt's pained whimpers and stopped abruptly, concern marring his face.

"Are you okay?" Sebastian whispered as he leaned down to run a hand lightly through Kurt's hair. Kurt's eyes popped open at the question and Sebastian found himself drowning in midnight blue eyes. Kurt's pupils were still blown wide, and there wasn't a trace of pain in his face.

"Don't stop, Sebastian…please, don't stop," Kurt whispered before pulling Sebastian to him in a bruising kiss.

Sebastian groaned into the kiss and started thrusting into Kurt relentlessly, each thrust becoming more forceful and faster than the last, but much less controlled. He felt Kurt clamp around his length for the second time that day and he gasped at the feeling. It made Sebastian push harder and faster into him until his orgasm blinded him with its power. He barely heard Kurt's shout as he collapsed on top of the brunet, both gasping for much needed air.

"God, you're beautiful together," Blaine whispered to them as Sebastian rolled off of Kurt and settled on the other side of the bed. Kurt had his eyes closed and was breathing deeply, although his face looked peaceful enough to appear like he was sleeping.

Sebastian shot Blaine a lethargic smirk. "Not half as beautiful as you two," he mumbled sleepily.

"Do you have some tissue? Kurt hates sleeping with come on his stomach, no matter how small an amount it may be," Blaine asked softly. Sebastian peered at him sleepily and saw that the other man was fighting sleep as well. He was fighting the pull of sleep so he can clean his fiancé up, even if said fiancé seemed to have blacked out after his orgasm hit him. The idea pulled at something in Sebastian's chest.

He nodded at Blaine and turned to his side to open the drawer of his bedside table and took out a box of tissues. He handed it to Blaine who smiled gratefully at him and commenced cleaning Kurt up. He took a couple himself so he can wipe the bit that was on his stomach and chest, before throwing both the tissue and the condom he used into the trashcan beside the table.

"We can lea –" Blaine started to say, but Sebastian waved whatever he was about to say off before pulling the light sheets he had on his bed over the three of them.

"You both can stay for however long you need to sleep. Let's talk when our brains are not leaking out of our skulls, okay?" Sebastian said lazily as he snuggled under the sheets and faced the couple. He caught the smile and the nod that Blaine gave him and it was enough to settle the thudding in his chest that had nothing to do with the powerful orgasm he just had a few minutes ago.