What I remember about the story is: It was set after the defeat of Naraku. Kagome and Inuyasha are preparing for their wedding, Sesshomaru comes to the village to visit and is bothered by the priestess. He feels a sense of longing for her and unexpectedly kisses her. Kagome gets angry at him and he realizes that he has no chance with her, so he devises an elaborate plan to get her. He kidnaps his brother and uses a spell to disguise himself as Inuyasha. Kagome not knowing anything marries Sesshomaru cloaked as Inuyasha. Shortly afterwards he begins to physically and emotionally abuse her. I remember he gave Kagome an amulet that has the ability to read whether or not someone is being truthful. It was incomplete at the time, don't know if the author has updated it. Would love to finish reading it.
Thanks.