I just came in here to say how thankful I am that the phrase “need answer fast” wasn’t included in the OP! 
Thank Og for legal necromancy. But the OP was about the legality of sibling incest, not cousin marriage (ie, nail sister, not marry cousin).
I don’t understand the “eww” reaction as regards step-siblings. Among my closest friends are a couple who have been married now for nearly 55 years who are step-siblings. It may help a bit to note that they never lived in the same household, nor, until they married, even in the same city. Where’s the “eww” factor in that?
The quite good comedy movie Clueless.
Adopted sibs- not incest, marriage not illegal in Indiana nor in the Catholic Church.
What’s the SDMB record for revivals of a zombie thread that was allowed to live by the mods?
I don’t know, but I’ve marked my calendar for some 2014 undeadening.
NM
If this thread gets revived again in 2 years, I’m going to marry it!
EWWWWWWWWWWWWWW!!!
Actually, the mention was of the “48 contiguous states” – that is, the ones other than Hawaii and Alaska. Not that either of them prohibit the eating of boogers, as far as I know.
How does sex with sibling who was adopted bad in the “gene pool” terms?
This thread of mine (how many days in Groundhog Days) was:
born in Dec 01
revived in April 03
revived again in June 03
revived again in Oct 2010
revived again in Feb 2011
So, 5 lives so far (not that I’m hinting for another revival or anything). 
But I have no idea if this is a record. In fact I kinda doubt it.
a newbie revived a zombie that pointed to this zombie in which i read the above.
i think the thread is available.
Moderator Note
johnpost, don’t revive old threads pointlessly, especially in GQ.
And so the unquiet dead at last meets its doom.
Colibri
Zombie Killer