You need to find a good attorney who specializes in divorce/family law, and make your first visit (which is almost always
free) well worth your time. Compile all the
papers you have- the original judge's order that the girls not have unsupervised visits, your divorce decree, any statements you can get from the girl's therapists that being unsupervised with this boy would be harmful, etc.
And you need to sit and write your story more clearly than this.