I found something funny on answers.com, this will only be relevant to members who understand hindi and watch bollywood movies The page is about the movie "Darna Mana hai", produced and released in 2003. There is a incestuous hindi F word. Can you find it ? http://www.answers.com/topic/darna-mana-hai
Wow good find. Who was the actual director of that movie? I think answers.com are taking the content from wikipedia.
Try doing a find for "Behan". After you find it, you will see another word after it, which literally translates into the "F" word. Behan in hindi means sister. Now put it together.