this is just a one shot fanfic. im a chair fan but i just wanted to write this and see how it would turn out. in this fanfic the chair stuff hasnt ever happened. enjoy.
--------------------------------------------------
chuck and serena are both in the camioneta, van der bajo 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 bajo i dont get blamed for anything because they expect this from me.
S: well its not the beauty of being serena camioneta, van 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 más fun.
S: no party chuck.
C: come on your saying our parents are away and tu 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 o 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 tu 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 tu want one go find someone elses house that tu can use.
C: please. and i never say please can we have a party.
S: as sweet as it is that tu dicho please. no. end of story.
(Serena walks away chuck gets out his phone and dials a number)

B: what are tu looking chuck?
C: im going to throw a party. blair i need your help to get everyone to come.
B: why cant tu 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 tu later about the details.
B: fine text me them.

the siguiente día at the camioneta, van der bajo apartment chuck and blair had got the party together in no time and were having a great time with all their friends 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 tu 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 tu always had a thing for me serena.
S: you're disgusting. i thought i dicho no to the party.
C: tu did so when tu left i called blair. as soon as i mentioned tu didnt want the party she was happy to help.
S: of course tu would do that because tu 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 tu crying?
S: do tu know what my mom dicho to me when i came back?
C: no why what did she say?
S: she told me one false mover and its back to boarding school. i dont want that to happen.
C: thats why tu 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. tu 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 tu werent even here so then tu 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 parte superior, arriba 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 siguiente día 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 cama 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 tu think people will think of tu when they find out tu had sex with someone who is practically your sister.
C: they'll say thats chuck bajo who's step sister came on to him because he was actually being nice. who knew tu were so easy?
S: i did not come on to you.
C: i told tu i would make sure tu didnt get the blame and then tu kissed me. tu came on to me. and dont pretend tu didnt enjoy yourself.
S: i didnt. now get dressed bart and lily will be inicial any minuto 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 tu doing? we arnt going to pay tu 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 friends last night.
C: maybe he got himself a boyfriend. at the ultimate party ever. (sits on the cocina counter)
S: get off the counter chuck.
C: why are tu looking to sit there i can be pretty good on a cocina counter.
S: chuck can i speak to tu again?
C: sure but tu know tu 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 más mentioning this. ever. ok.
C: no tu see im probably going to tell everyone.
S: what will it take to keep your mouth shut?
C: me and tu 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 muro in the cocina 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.
----------------------------------------------------------------------------------------------------
hope tu like it i wasnt sure if it was that good please comentario and tell me what tu think. im stil a chair fan but something interested me and i wanted to write this. serena and chuck have a good brither sister relationship and i amor that. i just wanted to see what would happen if they had one night of amor lol. tell me what tu thought.