WTF IS UP WITH PEOPLE AND THESE 3 WAY INCESTS!?!? its jsut not right..... well mayb if both of you are blonde twins i can see where it would b hott for him.... but still.... just dont touch ur sissys pussy

Looks like a case for the new OFF! Incest Repellant.

how do the fuck does this shit happen

that's my name, oh $hit.

yikes..... enuff said

dude doin it with ur sis is just ewwww

agreed

423 is a win :)))

no it wadnt the ops sister it was the ops bfs sister

yum

Lawl Win

Green Man Is A Perv!

*Gasp!* it's lyk a soap lol jk :p

oh ew...

first

Maybe he meant Brittney sperms I mean Spears

LEAVE BRITTNEY ALONE *cries*

haha how did u come up wit dat 423

Yes because Brittany isn't a common name at all. Your boyfriend's sister is the only Brittany in existance.

I bet he's from Alabama

Just proves the fact that your sister makes better sandwiches than you, so get back to work you whore!!!

Who has sex with their sister, she must be a whore. Hopefully you kicked him in the balls and dumped his a$$.

I'm Brittany lol

499 lmao 527 u play lax???

omg what's up with these stupid sluts

WINcest!!!

he meant Britney spears!

153rd trooper lmfao for that last comment!!!

Brittany Spears?? :/ im sayin anything to make it seem like incest was not the case ewwwww!! D:

incest da best put yo sista ta da test bitch

hahahaha xD

You'r effing retarted, I guess your parents had you out of incest, that's why you talk like that. Poor boy.

469 why does op say "that's his sister" then

misread what you said sorry

:OMG!.….….Thats So Effin Messed Up.!:pp

wow dumbass

best Facebook group ever

is it at least a half sister?

Am I the only one that thinks that Brittany is a common name and could have been cheating on her with someone else .

wow he had sex with his own sister that is so disgusting!

his sister not hers

498-- it's spelled "Britney" if you're gonna make fun of someone, spell their name right..

498-- it's spelled "Britney". if you're going to make fun of someone at least spell it right!

Caroline is pretty close. I see where he may have messed up

Poor girl. He might not have been thinking about his sister. Could have been another Brittany. Or he could be a sick bastard that's into incest.

Either way. Sucks for OP

Maybe he dosnt know any one else named brittany

Sissy pussies , lmfao!!

Sure, she said it was his sister, but couldn't that also mean step sister? It's still a little bit creepy but at least it's not incest.

Haha agreed

Yea incest is really looked down upon in 49 states (sorry Alabama)

Really though! Y would u do your family???? WTF????

Good job like lol

If you can't keep it in your pants, keep it in the family.

Time to have a three some

@greenman that is nasty

yaaaaaaaaaaaaayyyyyyyyy incest!!!!

fuk you that's grossss

by the look of greenman's pic, he would know

creepo

lol

keep it in the family, thats what i say

greenman scares me

Incest is the best, put your sister to the test! Noooo just kidding! But that is nasty!

I agree and wow you're beautiful

greenman, i'm sorry but you look really creepy and incredibly pervy

ur hot

oh.. don't know what to say FYL

hey I'm you!!!

That's a pretty common name- not necessarily talking about his sis.

# 467, you're HOT!

agreed /:

lol!

wincest

umm eww not even close

and that's how he's was made...

second

greenman is a creepy perv his probably molested a few nieces or nephews or raped someone eeeww

ur fucking wierd

incest is best... says the creepy Mexican guy

maybe his brother #638

that's hilarious nice 1!!!

holy shit your hot.

you look like you know all about incest!!

fuckin creep.

People don't bash the guy! he looks shit faced. chill.

melly14398 I just have to say your absolutely gorgeous

Ya maybe for you. Fuckin wierdo. Btw you look like a sexual predator

No need for the question mark Just ew

Please don't say lol. -.-

Interesting...

Incesting...

What kind of weird ass wincest is your boyfriend into

Damn keep it n the family

Kinda reminds me of that family guy episode where Meg and Chris hook up;)

Hot! Wincest! :P

yikes

1087, I was thinking Joe Dirt. "I'm your sister! I'm your sister!"

#1100 " THINGS GONNA HAPPEN TO ME, I'M JOE DIRT!"

I cunt understand how you can mess up your girl friends name with your sisters

Its incest

Ahhh #1137, so innocent, so innocent.

This is fucked up on a Lannister level.

incest=wincest

WINcest!

Lmao

he prob denied he didnt call u that name

Incest is the best sex

1003 - You must have very weird standards.

1003 doesn't always have incest sex, but when he does, he brags about it online.

"Incest is best, put your sister to the test!"

i think the real question is what did OP say after that..

Dude that was Hilarious

Wtf..

#1009- agreed

I liked Ur comment but incest = NOPE

kek

Yeah Britney

1125 - *Brittany

that sounds very reasonable

Ya I could see that happening.

Could the gf have heard her as well

Can I get ur number

Umm #22, you generally don't have conversations with siblings whilst having sex with your girlfriend...

or maby he was cheating on the op with a girl named brittany

Well in this case then thats better

That reminds me of another FML

#1020 a lot of things would be better in this case......

It could be Brittney Spears. For all we know, this could of happened while she was still hot.