fic rating question

Just a teensy question for those who have read The Dark Side of Reason *points a bit further down*. R or NC-17? Because I'm not sure whether to try and submit it to FA if it's too high-rated - the poor guys are swamped with fic like nobody's business, and I'd hate to foist a rating decision on them at the moment...

HAPPY BIRTHDAY TO THE AMAZING GINA/gmth!
(does June look like a veritable f-list birthday month or what?)