In order to prepare for your interview you should familiarize yourself with their mission and understand the issues that the organization is working towards eradicating. You will be working with people who are very passionate about their mission statement. You should understand what "healthy boundaries" are as this is something that they value since you are working with a vulnerable sector.
Don't go stay away!!! Worst place to work in Canada never ever been treated so badly. Apply somewhere else!!!!! If you do get an interview they will talk to the next candidate about your interview. Saw the other lady's resume. Should have walked away at that point!!! Sounds to good to be true...it is!!!