I read this thing a few years ago but apparently didn't bookmark it. So, good people of Dokuga, lend me your vast knowledge of fanfics!

1) It was canon.
2) The most I can remember of it was the first chapter which consisted of a bit of back story and Sesshomaru grinding on Kagome like a horn-dog*.
3) I think Kagome usually traveled between the inu and maru groups regularly to deliver stuff to Rin. While she's doing that, Sesshomaru would pretty blatantly hit on her via being hot and sexy.

Not much to go on but hopefully this will turn up something. I've been looking for a while.

Thanks for your help!

*Please note: Puns are always intended.

This sounds like "It Is What It Is" by Danyealle-Sama. It is rated MA.

www.dokuga.com/fanfiction/story/5049/1

I forgot about this fic, I just finished rereading it... I made sure it found it's way into my favorites this time. Thanks for bringing it up