I'm not sure on the title, all I remember is that Sesshoumaru and Kagome had been together and ended up splitting, and Sesshoumaru was with Kagura and they had a daughter, who was Rin. Kagura made Rin take a potion every month that hid the fact that she was a hanyou and that she was really Kagome's daughter. I believe Kagome was her teacher. The last thing I remember was Sesshoumaru finding out that Rin was really Kagome's daughter and he was going to go and find her and try to get her back. If this has been updated I would love to find it. If anyone can help, please and thank you. ^_^

sesskag.com/fanficread.php?fid=6476&cid=1

The title is Secrets Beneath the Surface - by Sesshy's RoseB)

It is also being updated on FF.net:

www.fanfiction.net/s/3544129/1/Secrets_Beneath_the_Surface

but the last chapter that was posted there was on Jan 30 and it is now caught up to where it was on SingleSpark.

That's it, thank you a bunch, I just happened to think of it today and I wasn't sure if it had gotten any further. Karma for you ^_^