A/N: Kurt comes home from a business trip early to surprise his fiance, and finds Sebastian in bed with someone he never expected. Futurefic, angst, hurt/comfort, fluff, romance.

Kurt dragged his suitcase the last five feet to the door of his and Sebastian's penthouse, limping the heavy piece of luggage across the hardwood floor, thoroughly exhausted but elated over his devious plan.

He had been so excited when Isabelle Wright told him he would be accompanying her for the European leg of her book tour. She had written her memoirs and apparently Kurt featured very prominently in the later chapters. It was the opportunity of a lifetime, but it was also the longest he had ever been away from his fiancé since they had gotten engaged. Kurt knew from the start that he wouldn't be able to stand not seeing Sebastian for so long, so he made Sebastian agree to join them for the last week in Paris. Sebastian had ribbed Kurt for weeks when Kurt made him swear up and down almost daily that he would fly out.

"It's just a month, babe," Sebastian had taunted with his permanently implanted smug grin on his face. "You mean to tell me that you can't be without the D for four short weeks? I mean, I know you have a flesh jack and a dildo the size of a ballistic missile. I'm sure you'll be fine…no, wait. I take it back. I'd miss me, too."

Kurt knew that Sebastian loved to tease him, but it still bugged him that Sebastian didn't seem to be bothered at all that they would be apart. It was almost like Kurt could be there or not be there. It honestly didn't seem to matter to Sebastian at all.

"You'll miss me so fucking hard that you'll come home early," Sebastian said to Kurt at the airport while he waited to board his plane. "I know it."

"Yeah?" Kurt said. "What about you?"

"Me?" Sebastian said with a laugh. "Don't worry about me. I'll be fine."

While Kurt was gone, they texted and they Skyped every chance they got. Kurt always ended their calls by telling Sebastian he wished they were together.

Sebastian always laughed it off with an almost half-hearted I love you.

The first two weeks went by slowly for Kurt, a constant knot growing in his stomach even though he tried his best to keep himself busy and keep his mind off Sebastian, but the more that Kurt talked to Sebastian via Skype, the more he started to worry. Sebastian started to become distant. Their conversations got shorter and shorter, and Sebastian didn't seem all that ecstatic to see him when he did call.

Kurt had been on business trips before - so had Sebastian - but never for this length of time. He knew it would be difficult, but he didn't imagine things between them would change like this.

Like Sebastian said, it was only one month.

Without letting Isabelle in on all the details, Kurt managed to finagle leaving the tour in Germany to come back to New York, planning on flying out with Sebastian to Paris together.

Kurt unlocked the door to the penthouse slowly and crept in, taking care not to wake Sebastian and ruin the surprise. He left his luggage inside the door and kicked off his shoes, padding across the vacant living room and into the master bedroom.

All of the lights were off in their bedroom. Kurt peered into the darkness but all he could make out was a large lump inhabiting their bed. It took Kurt's eyes a moment to adjust to the darkness, but when they finally did, when he could finally discern the location of legs and body and arms, he became paralyzed.

There his shirtless fiancé lay in bed…in the arms of another man.

Kurt couldn't breathe. He sucked in air quickly through his trembling lips but it wasn't enough to fill his lungs – not by a long shot. Kurt hiccupped, on the verge of hyperventilating, but he didn't cry. He was furious. He was heartbroken and furious. He stormed over to the bed, ready to bear his claws and tear both men apart. He was working on pulling off his engagement ring, ready to wake Sebastian up by throwing the Godforsaken thing in the face of his cheating, traitorous fiancé and his skanky paramour. He got as close as he dared, taking aim.

Kurt stopped with his arm raised to strike. His face scrunched. He tilted his head from side to side. Then he smiled.

He slipped the ring back on his finger.

"Bruce?" Kurt tugged at the boyfriend arm pillow, waking Sebastian from his sleep. Sebastian startled, looking up at Kurt with heavy lidded eyes.

"Wh-?" Sebastian murmured, drunk with sleep.

When he realized that Kurt was standing over him with the confiscated boyfriend pillow in his hands, he sobered quickly and sat up straight.

"Uh…K-Kurt!" Sebastian stammered. "You're home early."

"Yes," Kurt said. "Yes, I am."

Sebastian ran a hand through his unkempt bed hair, doing nothing to smooth out the strands that stuck out all over. He looked at Kurt, his serious demeanor countering Kurt's efforts not to laugh.

"This isn't what it looks like."

"Really?" Kurt said. "Because this looks like you were sleeping with my boyfriend pillow, Bas." Kurt smacked his fiancé lightly on the arm. "Sebastian, you know Bruce and I are exclusive."

"Don't read too much into it," Sebastian said, finally pulling himself together. "I needed another pillow to raise my head. I was congested as hell."

Kurt barked out a laugh.

"Do you expect me to buy that?" Kurt asked, tossing Bruce toward the foot of the bed and settling himself down on his usual side of the mattress.

"I don't give a fuck what you buy," Sebastian grumbled, flopping back down on the bed.

Kurt curled up against his reluctant fiancé.

"You said that Bruce creeped you out," Kurt said, toning down the teasing and the sarcasm.

"It does."

"So…why are you…"

"Because," Sebastian interrupted with a huff, "it smells like you."

Kurt looked confused.

"How can it?" Kurt asked, sitting up to grab Bruce. Putting the pillow up to his nose, he took a sniff. "I haven't used it in forever."

Sebastian sighed.

"It smells like you from when we started going out," Sebastian explained. "When you used to wear Paco Robanne and not that fruity cologne your boss at Vogue gave you." Kurt left the pillow and snuggled back against Sebastian's side. This time, he put an arm around Kurt. "You know, when there were no month-long business trips interfering with our lives…interrupting our anniversary."

The last few words he muttered under his breath so low that Kurt nearly missed them.

Kurt scrunched his nose, shaking his head.

"What anniversary?"

Kurt was the crazy anniversary diva. He had every single one written down on his calendar – first date, first kiss, first time together. He even kept track of some of the more obscure ones like the first time Sebastian ever bought him flowers, the first time he got his coffee order right without asking, the first time he held his hand in public.

How could he have missed one?

"Bas?" Kurt asked softly. "What anniversary?"

Sebastian blew a long breath through his lips.

"It's…not one I ever told you about," Sebastian admitted. "I kind of just keep it to myself, and I try to do something special for you without giving you a reason. But we've never been apart on that day before, and I didn't think it would bother me…but then you were gone and I really missed you…"

Sebastian looked at Kurt and Kurt looked back with silently pleading eyes.

"What anniversary?" Kurt asked for a third time, crawling up Sebastian's body and resting his head on his chest.

Sebastian averted his eyes back up to the shadowy ceiling.

"The anniversary of that first day I saw you at the Lima Bean," Sebastian said.

Kurt was stunned speechless, and Sebastian rolled his eyes.

"But you…"

"Yes, I was trying to get into Blaine's pants, but no, I didn't hate you," Sebastian said. They had had this debate many, many times before. "And I know I never told you, but it was actually an important moment for me."

"So, why didn't you tell me that?" Kurt asked. "After we started dating?"

"I didn't know how to tell you in a way that didn't make it sound like a bad line," Sebastian said, running his fingertips up and down Kurt's spine over the tailored jacket that he still had on. "I didn't want to reduce it to an anecdote. Something people would say we could tell our kids later on, because it doesn't really belong to anyone but me, you know?"

Kurt smiled and nodded.

"Yeah," he said. "Yeah, I do know."

Kurt inched closer to Sebastian's lips and kissed him softly.

"Happy Anniversary," Kurt whispered against Sebastian's mouth.

"Happy Anniversary," Sebastian whispered back.

With a wicked chuckle, Kurt kneeled up on the bed and straddled Sebastian's hips, unbuttoning his wrinkled jacket.

"So, how do you propose we celebrate this momentous occasion?" he asked, carefully tossing the jacket aside.

Sebastian reached eager hands up to help Kurt with his pants while Kurt attacked the buttons on his even more wrinkled dress shirt.

"I suggest a celebratory fuck," Sebastian said, bucking up his hips for emphasis.

Kurt made a disappointed noise.

"I thought maybe we could make love," he said, tossing the shirt to join the jacket.

"Of course we can, babe," Sebastian said, tugging on Kurt's pants so he would move and pull them down. "After we fuck, I'm all for making love."

"What about Bruce?" Kurt threw a look over his shoulder at the abandoned pillow teetering at the foot of the bed. Sebastian pulled Kurt under the covers.

"Babe," Sebastian said, rolling his fiancé beneath his body, happy to find him already hard, sliding beside his own erection, "eventually you're going to have to tell him you're not all that exclusive anymore."

Before he attacked Kurt's neck and made his fiancé moan, Sebastian gave the bed a sharp kick and sent Bruce straight to the bedroom floor.