Ok so I know I've already got one multi fic on the go but I couldn't help it this idea was just bugging me for ages! It's slightly similar to Together Forever in the beginning but trust me as it progresses they will be poles apart!

Disclaimer: I do not own Gossip Girl

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Hey B! Where is he?" Serena ran to Blair from the elevator, engulfing her in a hug.

"He's in the nursery," she said returning the hug "I just finally put him to sleep." She followed her best friend into the exquisite nursery Chuck had done.

"He looks so much like you." Serena said gently stroking the newborn baby forehead.

"Do you think? I think that he looks the spitting image of Chuck" she said in a hushed voice as to not disturbing the baby. "I mean look at his lips- I can already tell the Bass smirk will appear there." She grinned to herself- who would have thought that after all the games Blair Waldorf would become Blair Bass and have a child before the age of 22.

"I guess but his little wisps of chocolate brown curls are definitely you"

"True- he's the best of both of us." Blair grinned unable to keep the joy off her face at the thought of her baby.

"So what did you finally decide to name him?" Blair pulled her friend out of the room and led her towards the lounge.

"Theodore Charles Bass- it means divine gift in Greek, which is very fitting considering that's where he was –"

"Lalalala! I don't want to know yours and Chucks sex life" Serena covered her ears until she was sure Blair was going to stop.

"Fine I wasn't going to say anymore anyways. So S what is up with you recently?" Blair asked sipping her coffee.

"What do you mean?" The blonde stared at her best friend trying to find out what she knew.

"Oh not much" Serena breathed a sigh of relief, "only that Danproposedtoyouandyou saidyes!" Serena was shell shocked she hadn't plan on telling anyone about the engagement yet. "Why didn't you tell me S?"

Serena could see that Blair was slightly hurt by the assumed secrecy of the matter, "Oh B I was planning on but you only just got back from the hospital a few days ago and I didn't want to stress you out!"

"It wouldn't have... well it may have slightly if you said you were planning on having a 'Brooklyn' style wedding. But you would never do that would you S?" She asked sweetly.

"Ok B who told you about all this?"

"You mean how you plan on getting married in the city hall. Dorota did, who got told by Vanya, who overheard Dan telling Eric."

"I knew what you would say Blair, I was just trying to break it to you gently."

"How could you do this S? You know how much I wanted to be you're maid of honour and have the baby as a ring bearer it would of been so cute!"

"I know but Dan doesn't want the whole big wedding thing and well you saw SATC and we know how well it turned out when Carrie wanted the lavish wedding."

Blair looked in disgust, "Please S Dan is no Big and you're no Carrie- you're better you're Serena Van der Woodsen and you are going to have a fabulous lavish UES wedding!"

"You're right B I should get the wedding I want." She jumped up and grabbed her hand bag, "I'm going to tell Dan and start planning

"I knew you'd see sense eventually"

She walked Serena to the elevator, "Hey B where's Chuck? I mean shouldn't he be helping especially with Theo not even a week old?"

Blair's heart clenched, "He's had to rush into the office there's a big emergency apparently." She lied.

"Oh ok well make sure he pulls his weight" she giggled, "see you soon!"

Blair walked to the couch and sobbed she knew her husband was with someone else- every time he'd left her the last several weeks she knew what was going on. This wasn't something she could brush under the carpet and forget through purging- her son needed her now and she had to be strong enough to face up to Chuck. She knew Chuck wouldn't be back for a while so she decided to call Nate.

"Hello?" he answered.

"Hey Nate, It's me Blair, I was just wondering by chance are you free today?" I shouldn't have to do this I shouldn't have to seek comfort from my friends instead of my husband, Blair thought.

"Yeah sure I'd love to come round is Chuck there?"

"No he left a couple of hours ago." She sniffled.

"I'll be right over." Nate said about to hang up his phone.

"Thanks." Blair replied.

"You're welcome, see you in a minute." He said hanging up.

Unlike Serena Nate knew what Chuck was doing and he was furious. How dare he be so selfish to return to his old ways while Blair was pregnant? And then have the ordasity to see her not even a week after his baby was born. Blair needed help and for once Nate could be the one to give it.

Blair checked on Theo and sat down looking at the image that was privately sent to her.

The caption read: Thought you should know.

And below was a picture of Chuck kissing a redhead on the thighs, who was stretched out on the couch of office, with his hands pulling down her panties. It made Blair feel sick – she had never expected Chuck to do this to her. She thought he respected her, she thought she was different to the whores. She was so absorbed in the picture and trying to figure out what she had done wrong she didn't hear Nate come in or say "Blair, I'm here."

"Blair" he repeated again walking over to her, when he could see what she was looking at he knew that whatever was about to happen wasn't going to be good. "Blair put that away" She stared back at him- shocked that she hadn't noticed him until he had grabbed the laptop.

"How long?"

"What?" He replied although he was certain he knew what she was talking about.

"How long has he been fucking girls behind my back?" she hissed.

"I'm not sure" he looked worried she'd only just been released from hospital 2 days ago after the c-section; she shouldn't be under too much stress. But he knew if he didn't tell her she may end up doing something far more dangerous. "Since you were about 8 months pregnant."

She collapsed in Nate's arms shaking, "who else knows Nate?"

"No one I promise I only found out by mistake" he'd walked in on Chuck making out with a blonde in the bathroom of some lame hotel opening that Blair hadn't been able to attend due to her high risk pregnancy.

"Why Nate? Why?" She was looking deep into his eyes to see if he was about to lie to her.

"I have no fucking clue, he's an asshole and you should have been with someone so much better." He held her closer rubbing her back trying to comfort her. "As soon as I found out I punched him in the face."

"That's why you two have fallen out?"

"Yeah"

"Thank you Nate... for being honest and there for me."

"Yeah well fortunately some of us have grown up in the last few years" as they were about to let go of each other the elevator opened.

Chuck stood there with a Tiffany's box in his hand to appease his guilt.

"Well what do we have here? Nathaniel, Blair care to explain."

"Chuck? What do you mean?" They hadn't been doing anything wrong if anyone needed to explain he did.

Chuck waltzed over to Blair, pulled her towards him and kissed her forcefully. His arms move down to her waist to show Nathaniel who she belonged to. Blair pulled away quickly shocked at the way he was acting.

"Nathaniel, I'm afraid I'm going to have to ask you to leave me and my Wife alone" Chuck glared.

"Chuck, who the hell do you think you are? You're scum Chuck and you don't deserve Blair" Nate said grabbing his coat from the coat closet, he turned to Blair, "call me if you want to chat or anything ok?"

"Yeah thanks again Nate" Chuck grew even more angry- how dare Archibald try and 'comfort' Blair. So Nate hastily left the apartment.

"Why would you need to chat with him Blair?" Chuck demanded

"Chuck don't you dare act jealous over Nate hugging!" She shouted pulling away from him completely.

"Why not Blair? Why shouldn't I be jealous and mad to see my wife being groped by her ex boyfriend" He said angrily.

"How dare you? You know he was just giving me a hug and he wasn't just my ex boyfriend he was also one of my best friends!" She said shoving him in the chest." If anyone has the right to be mad it's me!"

"What on earth are you going on about?" he said trying to keep his cool.

"I know what you've been doing or rather who you've been doing when you've been working" She spat back. His face looked shocked that she actually knew about his affairs.

She picked up the laptop and shoved the image into his arms.

"Blair how long have you known?" He said, ashamed.

"Long enough to know what to do next." She said waiting for his response.

"And what would that be?"

"I want a divorce." That was it those four words Chuck was terrified to hear.

"Blair please don't I don't want a –"

"I don't think you're opinion really matters anymore Bass, nothing you say will make me trust you again and once the trust is gone nothing is left." She walked into their bedroom and began packing her things into her suitcase.

"Blair I think you're forgetting that we've just had a baby, would you really want to drag a newborn through a divorce?" He was trying to think of anything that would change her mind, convince her not to leave.

"Preferably not but rather now than later when he'll remember it." Her eyes were cold she knew she had act like a cold hearted bitch in order to get through this without breaking down. "Me and Theo will be going to my mother's old apartment for time being"

"You can't take him Blair- he's my son too!" he growled at her.

"Oh really because when the courts hear how you left your newborn child to have sex with a whore I'm sure they'll deem you as a fit parent."

"Blair you wouldn't let that happen." Chuck suddenly afraid that what Blair said could actually become reality.

"No Chuck I wouldn't because I want you to have a relationship with your son but trust me when I say I am going to have full custody and I'll decide when you can see him."

"Blair I'm Chuck Bass I can buy the judge if I wanted." He warned her.

"Actually you can't considering you never made me sign a prenup and it was while we've been married for the last 2 ½ years you decided to take over your father's company, I will be getting half of Bass industries and probably half of your assets." She smirked she knew she had him beat

Chuck was in shock for the second time in 10 minutes he knew everything she was saying was true.

Blair walked into the nursery and began packing the baby's clothes when she felt Chuck pull her back.

"Wait Blair let's talk about this." He couldn't lose her or the baby he just couldn't.

She walked into the hallway so they didn't wake up Theo, "Ok Bass let's talk, let's talk about how although everyone warned me that you wouldn't change I believed differently and because of that was made to look a fool. Let's talk about how you would leave your pregnant wife for a cheap fuck. Let's talk about how the last couple of years mean nothing to me now and how I wish I'd never met you and how I regret that night in Victrola with every fibre of my being. Let's talk about how you lied in Church when you promised to love me forever."

He grabbed her face between his hands, "I didn't lie."

"Whatever Chuck, I don't believe you, if you still loved me which I doubt you ever did, you wouldn't have cheated." She was sick of his lies.

"I cheated because I was a coward and I didn't want you to leave me –"

Blair interrupted, "That makes no sense Chuck."

'When the doctors told us there maybe major complication in the birth due to the same problems my mother had when she died having me I needed to distance myself and forget about it. I love you too much Blair" he grabbed her hand, "I couldn't live without you."

"That is the biggest crap I've ever heard you asshole. If that were true why did you see her today?"

"To call it off, I knew that once you were fine I had been so stupid and I just wanted to put it in the past." She could feel her resolve crumbling but she had to be strong.

"I don't believe you and even if you did still love me I don't love you." Chuck felt like he'd been shot ... straight in the heart.

...Please review and tell me what you thought