I think I read it on AFF but I can't really remember but what I do remember is this. Kagome get caught by slavers and sold into Sesshomaru's Harem, I think she's bought by Jaken but not sure, The concubines there tell her not to be afraid because he's a gental lover but then he rapes her, for lack of a better term. Making his concubines liers and they don't like it so the tell him that Sesshomaru isn't allowed to see Kagome till she's over what he did to her. And i think near the end she is announced as his favorite and Rin is announced as her daughter. I really wish I could remember more.

I think the part about Sesshoumaru not being gentle and his concubines keeping him from seeing Kagome is from In His Arms by The Telepathic Hawk. I'm not sure about the rest, it's been a while since I read this story.

www.fanfiction.net/s/3885162/1/In-His-Arms (RATED MA)

That is the one I was looking for thank-you so much, it's been bugging me for weeks trying to remember the name.

You're welcome!