I'm looking for an older fics -- I don't know if it was completed, or if it turns out to be two separate fics, but I'll describe what I remember:

In the first one, all I remember is that Kagome changes into a demon, betrays Sesshoumaru somehow, becomes a slave in his household, ends imp having to clan a painting of Sesshoumaru with his mate, and Inuyasha with his mate. At the end, she's sold to the Lord of the North ( I think) and it turns out to be Shippo.