Eminem's sister-in-law Dawn Scott has reportedly died of an overdose, following a lengthy battle against a drug addiction. Dawn Scott is said to have passed away on Tuesday in the Motor City Trailer Park in Detroit. According to RadarOnline.com, the 40-year-old died of “an apparent heroin overdose, pending a toxicology test.”Scott has been friends with Eminem since she was a youngster. She is the twin sister of the singer’s ex-wife Kim Matthews, and the birth mother of the former couple’s daughter Alaina.After running away from home, Scott and Matthews moved in with Eminem and his mother when he was just 15, and he kicked off his romance with Kim back in 1989. He and Matthews married for the first time in 1999 and divorced in 2001, before remarrying in 2006 for just four months. Just four months ago, Scott revealed her struggle to beat her drug addiction, and told Radar that Eminem and Matthews were giving her no help at all.She said: “I have a millionaire brother-in-law and a sister with money up the ass.”Scott’s boyfriend Les Martin, who she had lived with on and off for the past four years, also told the outlet he had called Matthews many times and asked her to help her sister. He said: “I’ve been trying like hell to save her life. I’ve had numerous conversations with Kim about trying to get her help and it just wasn’t a conversation she wanted to have.“She wanted to let Dawn go. I was so frustrated I was like, ‘Do you have a $10 million insurance policy on her?'”..