HELP!!! Maid Of Honor Issues Effect Family

Ok. I asked a friend of mine if she would be my maid of honor, on a whim, and i wasn`t even engaged yet, though I know it was comming. Then, when I was engaged, I had to drop her. She was going to school in another state, planning her own wedding, and she never talked to me anymore, she never called, wrote to see how I was, all she did was send me forwarded emails with no personal value to them. I felt like I didn`t know who she was. So I dropped her and she got pissed, understandable. But I was her maid of honor, and was doing my best to help her. She called me up one day, and said she wanted me to come with her to help her with her bridal pictures. I cancelled all my plans, including ones with my fiance, so that I could help. Now she accuses me of not caring about her wedding, that I never cared for her. She swares at me in her emails, and worst of all, she married my fiance`s oldest brother which messes things up a bit. I have always been civil to her in my emails, I never swore and never blamed, literally. But I feel like I am in a jam. I wrote to her one time. She said she wished she had never picked me as her maid of honor. I wrote back saying that if she ever felt like she didn`t want me to do it I would gladly step aside bacause I just wanted her to be happy. Then she swore at me and said that that sentance proved I didn`t care. What can I do? I can`t talk to her, she doesn`t listen, and she just swares at me and makes me feel like I am worthless. What is funny is that her husband knows the whole thing and doesn`t know why she is so upset. All my friends are behind me and I have told them the brutal truth about everything. I know I made a mistake, but she did too. Ultimately, she crossed a line in my morals somewhere and I don`t think I could ever be her friend again. But what can I do to help the brothers still be able to get along and see eachother?