I remember reading this at least a year ago. It was AU and Kagome was married to Sesshoumaru. He was part of a really tight family that was almost like a mob where the men had all the power. He belittled Kagome and I think was going to take a second wife or a mistress. Kagome gets really depressed and goes to InuTaisho and begs him to let her leave and to hide her because she is worried for the safety of her unborn child. In the end she ends up leaving and hiding and a few years later Sesshoumaru finds her in a park with their child.
I hope this was helpful enough and someone remembers this story.
