Unfortunately the Google robot can only tell what your hub is about from the text it contains. And the phrases 'submissive women' and 'dominant women' are probably flagged as being mainly used by
Unfair I know, but they can't check every page manually.
* just another thought do you use these terms as the tags in the pictures used on the hub, because if so that could be the main problem - pictures tagged as sub/dom women,are bound to appear suspect,
maybe change that Perfect Spanking
and the main hub text should be OK.
** ^ I've just checked and yes you do, so to Google your hub looks like a page full of pics of sub/dom women. I'd guess that's your problem, great pics though.