okay, so a while ago, before i really bothered much with the h-manga area i was reading some suggestions for plot driven 1's on a forum (which no longer exists) and 1 of them popped into my head while reading a novel completely unrelated to it lol, anyways this is the gist of what i remember (will be quite vague):

the story is about a princess(warrior?) who is violated by her brother (can't remember if it went all the way to sex), afterwards she leaves the castle (either as an order or run away) and gets caught by demon/beast men, who then proceed to rape her, later her maid? comes searching for her, and same thing happens to her

i seen it on Doujin-Moe before the site was updated into the confusing mess it is now
it was a long h-manga (over 100 pages)
i think it had tags along the lines of [[Rape, Incest, Demons]], possibly had tentacle and futanari too

as i said before, quite vague, so any help will be appreciated

stupid photobucket, wanting $400/yr just to display your images

Well, the details are quite a bit off from what you describe, but maybe Princess force?
It's the only one that I remember straight out that has a similar theme and tags.

[img]http://i2.kym-cdn.com/photos/images/original/000/028/438/5700.necropost4kobf7.png[/img]

thanks, its similar, but that's not it, though the art and context are pretty close

stupid photobucket, wanting $400/yr just to display your images