A/N: This is only going to be a couple of chapters long. Just Idea that hit me and i wanted to go with it. I have other stuff I am writing so going to get back to those once I am done with this.

Summary: Sebastian fell for someone and ended up having one great night with this person. Putting aside his condition while he was doing it. Later he gets a invite to the wedding of this guy and another and has only one reason to go, his son.

Warnings: Slash, breaking up, mention of Mpreg.

Disclaimer: I own nothing Glee related

Chapter 1:

Sebastian didn't know what the hell he was doing. All he knew was he had received the invitation in the mail two weeks ago and had been battling with the idea of not going. He wasn't even sure why they would invite him to their wedding in the first place. He was a right prick to the both of them since the moment he met them and when he finally changed his ways he screwed everything up again.

He had first went after Blaine, he was everything he had been looking for in a boyfriend, sweet, kind, sexy, incredible at everything he did or set his mind to. He was what Sebastian had thought he had wanted so he went after him. Then he found out about Kurt. At first the other boy drove him up the wall. His voice, they way he carried himself, the way he dressed, everything the other boy did just stamped on all of Sebastian's nerves.

He did horrible things to both the boys in trying to get Blaine to be his. Along the way he got to know more about Kurt that stayed in his head. The boy was fiercely loyal, stood by his boyfriend and friends no matter what. He could sing like a dream and his eyes were the most hypnotizing thing Sebastian ever laid his eyes on. He found himself wanting to have those eyes only looking at him with kindness, not the loathing that shone in them everytime he walked into a room where the other boy was.

He finally changed his ways, finally showed them he wasn't what he had been portraying to the words the last couple of years. He still has secrets, but he knew or thought they were never going to be found out.

Then he found out the golden couple had broken up when Kurt left for New York. He was tempted to try and be there for Blaine, as only a friend, his crush on the dark haired boy left when he found out more about Kurt.

Then he had to go to New York with his parents for some stupid family thing. He hated it. He didn't want to go. They left him alone most of the time and he had no idea what he could do. One night he decided to give his fake id a try and went to one of the clubs down the road from their hotel.

He was sitting at the bar when he discovered a man dancing a little bit away from him and thought he would go an try to have some sort of fun. He walked up and started to dance behind this amazing guy, small hips swaying to the music, hair styled just right. He placed his hands on the small waist and loved the feel of the other guy moving back into him. They danced for a couple songs in this position until someone came up in front of them. Sebastian thought the girls looked a little familiar, then he saw her scowl at him and pull the man he was dancing with to her.

"What the hell do you think you are doing?" The girl snapped at him. It took him by surprise at first but he decided to play nice, he wanted to see where this was going after all.

"I was just dancing with this amazing dancer here. Sorry if I offended you, or if you are his girlfriend." He responded. The man suddenly turned around after hearing him speak.

"What the hell. Let's get out of here Racheal." Sebastian felt his heart drop when he realized who the other man was he was dancing with.

"Wait. Kurt." Sebastian yelled over the music as he started to run after the other two. "Wait." He said again as he gently grabbed Kurt by the arm to stop him from leaving the club.

"Let go of me Smythe." Kurt said ripping his arm out of his grasp.

"Please don't go because of me. I'll leave. I shouldn't be here anyway and I need to get back to the hotel before my parents get back anyway. You stay and have a good time. Sorry if I offended you, but it was nice dancing with you." He nodded his head as he headed towards the doors.

When he got outside he looked around. He didn't really need to get back to the hotel, his parents wouldn't care where he was as long as he got back before they headed back home. He leaned against the wall and took a couple of calming breaths.

He just danced with Kurt and it felt amazing. His body lined up against his, moving together like they belonged. It was what he had been dreaming about for so long. It hurt because he always woke up longing, and knowing he would never have the other man to himself.

"Smythe?" Sebastian raised his head and saw Kurt standing there looking at him.

"Yeah?" He asked as he pushed himself away from the wall he was leaning against.

"I'm sorry I was snappy with you in there. I was just in shock. Thought you would've been with your boyfriend and not here in New York." Kurt stated making Sebastian frown.

"I don't have a boyfriend, what are you talking about?" He asked turning to face Kurt.

"Oh, Blaine just said. You know what never mind. I've got to get going anyway. Nice seeing you." Kurt began to turn around when Sebastian grabbed his arm again and pulled him back to him.

"What did Blaine say exactly?" He asked watching those amazing eyes lock with his.

"He said they the two of you were together now. You were after him for so long I guess i believed him. Sorry for my mistake." A light bulb clicked and he knew that Blaine knew he liked Kurt. That is the only reason the other boy would say they were together, he just knew it.

"Well I haven't wanted Blaine in a long time, not since I got to know you." Sebastian knew he was pushing his luck, knew this wouldn't get him anywhere. He also knew Kurt was drunk off his ass and this was just bad.

"Come back inside and have a couple of drinks with us, dance a little." Kurt stated as he pulled Sebastian by the hand back inside the club.

The next several hours involved Sebastian sipping on one beer, he wanted to remember this night for a long time to come. He was having fun dancing with Kurt and Rachel, talking and getting to know the other two and showing the side of himself he never let anyone see. He found himself back in Kurt and Rachel's loft a couple hours later and wasn't sure what was going to happen until he felt Kurt push him down on the bed and climb ontop of him.

He asked several time that night if Kurt knew what he was doing, if he was sure this is what he wanted. He knew inside of himself that he shouldn't have let it happen. That he shouldn't have slept with Kurt that night but he couldn't help himself. They had sex several times that night and he even let Kurt top a couple times. The first time he ever let anyone be a top was Kurt. His mutated gene slipping his mind as Kurt had entered him and came moments later with in him.

The next morning was the worst morning in his life. He woke up when he heard someone talking, whispering and peeked around the curtain that was blocking Kurt's room from the rest of the flat. He listened to him talking, making his heart break more and more as he heard everything the other man was saying.

"I love you to… Yes we can work this out….. I know what I did last night was stupid…...I was drunk, i'm so sorry… I really want to try again….. Of course I forgive you, I forgave you awhile ago Blaine. Alright I'll see you tomorrow. Love you too babe. I'm happy too." Kurt hung up the phone and Sebastian quickly pulled his clothes back on.

He didn't want to say around and talk. He didn't want to hear Kurt say how last night was a mistake. If he didn't hear the words he thought maybe he could go on and just remember last night as a really great time in his life that only lasted a very short while. He heard Kurt making some noise in the kitchen area and he quickly tried to sneak out of the loft, but was stopped by Rachel.

"Trying to sneak out now are you?" She asked him cocking her hip and placing a hand on it. Kurt came into the room and looked between them.

"It's alright Rachel, let him go." Kurt said as he looked at Sebastian.

"Right. Have fun with Blaine." Sebastian said as he walked out of the loft and willed himself not to cry. He heard the door open again as he was waiting for the elevator.

"Are you alright?" He heard Rachel ask, making him wipe his eyes before he looked at her.

"I will be. Thanks for hanging out last night. I had fun while it lasted. Tell Kurt he doesn't have to worry about seeing or hearing from me. I got the hint when he was on the phone." He heard the ding of the elevator and was about to walk into it when he felt arms wrap around him. He couldn't help it, he hugged her back and started to cry again.

"It will be alright Sebastian. If you ever need to talk I gave you my number last night. I'm sorry he's being like that." She said as she pulled back and smiled at him.

"I get it, I do. I was an ass for awhile there. I thought he got past that. I wasn't expecting anything from last night, but I continued to ask him if it was alright, if he would regret it. I'm going to go. THanks again."

Sebastian was pulled back from his memories when a little hand reached up and grabbed his finger. He smiled down at the little boy laying in his carrier and kissed him on the forehead.

"Guess I have to get Gramma and Grampa to watch you for a little while bud. I guess I'm going to a wedding." He just needed to talk to Kurt. He needed to know why he used him like that. He needed to let him know what happened afterwards.