okay, this was originally going to be a one-shot but then i decided to combine this with another idea i had...first two chapters will be about serena finding out about chuck/blair and then i will get to what happens if chuck and blair went to cotillion together. this chapter takes place at B's 17th birthday party...R&R!

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Serena walked away from Dan and over to the room Blair had escaped into. She had been in there for a while and Serena thought it was high time to check on her.

She opened the door slightly and ever-so-softly. You never know, she could've been asleep and Serena didn't want to wake her. She wasn't. Serena stood at the door, dumbstruck and speechless at the sight of Blair heatedly sucking face with Chuck Bass on the bed.

Serena looked behind herself to check if anyone was looking in her direction, then walked into the room. She closed the door so Chuck and Blair could just barely hear the click and stood with her back against the door. Chuck and Blair's eyes darted in her direction as Serena exclaimed, "Oh. My. God!"

Blair pushed herself off of Chuck and backed into the wall, as far away from the bed as possible as Chuck raised himself up on his elbows.

Serena stepped forward a couple steps. "What the hell is going on here?!"

Neither Chuck nor Blair looked at her. Serena took this as an ok to keep pressing on. "Blair, you and Nate just broke up and you're trying to get back at him by kissing Chuck? Chuck, of all people!? GROSS!"

"Who said I'm trying to get back at him?!!!" Blair spat.

"And, oh, we've done more than kissing if you know what I mean." Chuck insinuated, winking at Serena.

"Chuck!" Blair shot him a warning look, making him become very interested in looking at his shoes.

Serena looked from Blair to Chuck, and vice versa, several times, trying to comprehend what Chuck just said. "Oh, no. Please do not tell me that...you know. You two-"

"Had sex? That I removed our dear friend Waldorf's chastity belt? Now, S, do you really want the answer to that?"

Serena turned to Blair, "B, tell me he's joking." Blair raised her gaze to meet Serena's shyly. "Oh, God. You slept with him?!"

"Um..." Blair looked at Chuck, then Serena. "Kinda?"

Serena took a step away from the two of them and raised her hand to her head, taking all of it in.

"In the back of the limo. Last night. In case you wanted the details." Chuck teased.

"Chuck, now is not the time!" Blair snapped.

"Yes, Chuck. I don't want a mental picture of the two of you all horizontal and sweaty in your limo! And B, I thought you wanted to wait. I thought you wanted to make it special!?! But, instead you chose Chuck and the backseat of a limo!?"

"Whoa, wait a minute! So Nate gets the free pass and I'm the slut!?"

"I never called you that! I would never call you that!"

"Well, you sure did imply it." Chuck added, still lying on the bed, resting on his elbows.

"Not now, Chuck!" both Serena and Blair cried in unison.

Serena sighed. "Look, I'll just wait for you outside so we can go home. I'll meet you out there in five." and with that, she left the room.

Blair folded her arms. "Wow," she sighed. "Talk about a mood killer."

Chuck pursed his lips and nodded. He finally sat up, leaned forward, and rested his arms on his knees. "Yah."

"Well, so much for sex tonight." Blair started toward the door when Chuck got up and headed toward her.

"Now Blair," he backed her into the wall and rested his head on hers. "you of all people should know that five minutes...is all I need."

Blair giggled, putting her hands on each side of his face as he kissed her. Chuck lifted her up so that her legs were wrapped around his waist as he carried Blair over to the bed.

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sooooo....what do you guys think? please comment with your thoughts on it cz i'm not sure if its that good or not.

next chapter will take place during "Blair Waldorf Must Pie". til next time!