Today she is president of the world's biggest victims' advocacy group, with 12,000 members in 56 countries.
One of the hardest parts of that journey was losing her naivety about the professedly good intentions of the Catholic hierarchy towards victims, which she believes disguised a hostile strategy to silence them.
But the Survivors Network of Those Abused by Priests (SNAP) has brought profound benefits, too.
''One part of healing is tied to preventing future abuse. I'll never know what my life would have been like if I hadn't been raped as a child - I feel helpless. But if we can prevent another 12-year-old being raped we feel we have a mission.''
Ms Blaine came to Melbourne at SNAP's expense to give evidence to the state inquiry into how the churches handled child sex abuse. Her most heartfelt advice was not to take church officials at their word.
After a Philadelphia grand jury report in 2005 church officials promised many reforms, but a 2011 grand jury found there were 37 predator priests still working in that one diocese.
''It's not like one or two, or even a dozen, which would have been shocking. It showed you couldn't trust church officials because this is how they are directed to behave by the Vatican. It is the practice and policy of church officials across the globe,'' Ms Blaine said.
At the first SNAP gathering in a down-market Chicago hotel, those who came felt they would be healed by the time the weekend ended. It was just the start.
A breakthrough came when they realised every bishop told every victim he or she was the first to come forward.
''The bishops all had the same mantra; there had to be a policy. They all worked hard to convince us not to go to the police, and questioned our veracity and our motives. We thought the bishops were treating us horribly because they didn't know any better. When we got publicity we thought they were taking it seriously. They met us and promised transparency, but nothing has changed - they are still saying now what they said in 1993.''
But if the bishops have solidarity, so do the victims.
''The devastation and pain that victims endure seems to have no boundaries. A couple of months ago I talked by Skype with a survivor from Kenya. He had tears streaming down his face and said, 'You're an American and white and a woman, and yet you are telling me what happened to me'. But really I was telling what happened to me.''