That's a great question. Incest is ok to post. You may want to add something in the authors note mentioning that the story contains it though. But that's not a requirement.
Thank you for the information! I'll have to remember to add the warning, I know what it's like to start reading something and then notice that there's something in there that you really wouldn't have wanted to see. I started reading this fic once, it was kind of interesting at first but the author hadn't bothered/remembered to warn the readers about the gang rape scene.... It was not a pleasant surprise.
I'm glad you like my gallery