I agree 100% with everything Daes said. There is a big market for BDSM romances which seems to be growing lately. As a lifelong romance reader, I have noticed more and more BDSM elements and imagery in mainstream romances the last few years. In addition, you will find mainstream bookstores carrying Ellora's Cave and other BDSM romances. As you noted, the primary market is female - to females by far purchase the most books, so that is a great market.

I read your first chapter and really enjoyed it. Keep on writing !

fantassy