this is just a one shot fanfic. im a chair 팬 but i just wanted to write this and see how it would turn out. in this fanfic the chair stuff hasnt ever happened. enjoy.
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chuck and serena are both in the 봉고차, 반 der 베이스 apartment. serena has sort of grew fond of chuck as a sort of brother but still wont admit it to anyone.

C(Chuck): i think we should through a party while they're away.
S(Serena): chuck your parties always end up with something broken and things ruined.
C: thats the beauty of being chuck 베이스 i dont get blamed for anything because they expect this from me.
S: well its not the beauty of being serena 봉고차, 반 der woodsen because then they think i've gone back to the way i was and send me of the boarding school.
C: i rather old serena she was much 더 많이 fun.
S: no party chuck.
C: come on your saying our parents are away and 당신 dont want a party.
S: im saying yes it would be fun to have a party but i'll get blamed for anything that is broken 또는 ruined so no.
C: old serena would have agreed (Smiles)
S: (laughs) thats not helping your arguement.
C: what if we ask eric and he agrees?
S: no chuck.
C: what if i invite blair and make her be your friend again?
S: how could 당신 do that?
C: i'll tell her that i'll tell everyone that she slept with me if shes not your friend.
S: did she sleep with you?
C: no.
S: well anyway im not going to be bribed. read my lips. we. are. not. having. a. party. if 당신 want one go find someone elses house that 당신 can use.
C: please. and i never say please can we have a party.
S: as sweet as it is that 당신 said please. no. end of story.
(Serena walks away chuck gets out his phone and dials a number)

B: what are 당신 looking chuck?
C: im going to throw a party. blair i need your help to get everyone to come.
B: why cant 당신 do it yourself? and whats in it for me?
C: serena doesnt want me to have one so i need it to be kept secret from her. plus it will annoy her.
B: fine. only to annoy serena.
C: but i could put something else in it for you.
B: ew. bye chuck.
C: talk to 당신 later about the details.
B: fine text me them.

the 다음 일 at the 봉고차, 반 der 베이스 apartment chuck and blair had got the party together in no time and were having a great time with all their 프렌즈 from school. serena comes in and walks over to chuck and blair angry.

S: chuck can i speak to you?
C: i dont know can you?
S: chuck!
C: serena calm down not one thing is broken... but there is red wine on the cream seats.
S: CHUCK!
C: i was joking calm down have a cocktail.
B: yeah S i thought parties and getting drunk was your thing. (Smiles a bitchy smile. chuck laughs a bit)
S: B can we not go into this here. Chuck i need to talk to you
C: well talk.
S: alone.
C: i see 당신 want to get down and dirty with your new brother.
S: ew no.
(She grabs his arm and leads him to another room were no one else is)

C: i knew 당신 always had a thing for me serena.
S: you're disgusting. i thought i said no to the party.
C: 당신 did so when 당신 left i called blair. as soon as i mentioned 당신 didnt want the party she was happy to help.
S: of course 당신 would do that because 당신 know she isnt speaking to me and your just making things worse (She is shouting but tear well up in her eyes)
C: why are 당신 crying?
S: do 당신 know what my mom said to me when i came back?
C: no why what did she say?
S: she told me one false 옮기기 and its back to boarding school. i dont want that to happen.
C: thats why 당신 didnt want the party. (he sits beside her on the edge of the bed)
S: i would of had a party if it wasnt for that but i couldnt risk going back to boarding school. 당신 might not get blamed for things but i do.
C: im sorry.
S: i dont want to leave for eric's sake and im still trying to fix things with blair (Rests her head on his shoulder)
C: im really sorry. look if anything gets broken i'll say 당신 werent even here so then 당신 cant get the blame. (Rubs her back)

serena looks into chuck's eyes and chuck stares back at her. then they kiss, soon chuck is lying on 상단, 맨 위로 of serena and serena is opening his top. chuck put his hands up serena's little skirt. they continue taking each others close of till they are both undressed and they have sex. they fall asleep in bart and lily's room.

then it is the 다음 일 and serena wakes up and notices chuck lying beside her. she had been wishing it was a dream... actually a nightmare but it wasnt. serena had, had sex with chuck.
she got out of 침대 hoping to get dressed without chuck waking up but he did.

C: leaving me so soon. not enjoy last night.
S: chuck can we please never talk about this again?
C: i dont know the memory is still pretty strong.
S: yeah what do 당신 think people will think of 당신 when they find out 당신 had sex with someone who is practically your sister.
C: they'll say thats chuck 베이스 who's step sister came on to him because he was actually being nice. who knew 당신 were so easy?
S: i did not come on to you.
C: i told 당신 i would make sure 당신 didnt get the blame and then 당신 kissed me. 당신 came on to me. and dont pretend 당신 didnt enjoy yourself.
S: i didnt. now get dressed bart and lily will be 집 any 분 and the maid will have to make their bed. (Is all dressed and walks out)
C: (laughs) shes just in denial.

chuck is dressed and comes downstairs after about 20 minutes. he notices serena helping the maids clean the apartment.

C: what are 당신 doing? we arnt going to pay 당신 thats the maids job.
S: ha ha chuck. im trying to get this place ready before lily and bart comes home.
C: where's eric?
S: he stayed over at a 프렌즈 last night.
C: maybe he got himself a boyfriend. at the ultimate party ever. (sits on the 부엌, 주방 counter)
S: get off the counter chuck.
C: why are 당신 looking to sit there i can be pretty good on a 부엌, 주방 counter.
S: chuck can i speak to 당신 again?
C: sure but 당신 know 당신 cant handle speaking to me alone (Follows her into the empty part of the kitchen) what is it sis looking another go?
S: thats enough no 더 많이 mentioning this. ever. ok.
C: no 당신 see im probably going to tell everyone.
S: what will it take to keep your mouth shut?
C: me and 당신 again.
S: ew chuck no (Thinks about last night. she thinks it wasnt that bad.... then thinks about what she was thinking and thinks it was horrible even though she enjoyed it)
C: fine then gossip girl it is.

chuck is about to walk of when serena grabs his arm and pulls him back they start to make out against the 벽 in the 부엌, 주방 and then blair walks in. her mouth opens wide she is in shock but is laughing while taking a picture and sending it to gossip girl. everyone knows.
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hope 당신 like it i wasnt sure if it was that good please 코멘트 and tell me what 당신 think. im stil a chair 팬 but something interested me and i wanted to write this. serena and chuck have a good brither sister relationship and i 사랑 that. i just wanted to see what would happen if they had one night of 사랑 lol. tell me what 당신 thought.