Someone once said that there would never be peace in the Middle East because anyone with a hand grenade could veto it.  If you submit to the whims of anyone with an opinion, then you set yourself up.  You're using a figure which has "officially" been declared adult.  As long as you don't morph her into a childlike character then you're following the guidelines the site has promulgated, leave it at that.  If the admins want to pull something, the onus is on them.  You're not going to get an objective standard on this - everyone is going to view it through the prism of their own attitudes and experiences.  The mods supposedly try to account for that by getting multiple opinions before yanking an image.  I think under the circumstances, that's probably the best we can get.  I understand your concern but if you want to do art that will offend no one then you better hang up your mouse.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken