Well, its a horrible situation you are in. I bet it feels something like paralysis when you see everything happening,and you cant do anything about it.well,there is always some action to take.Even if your not related.You,or if you can talk to another relative of the family, can call child protective services.Of course,before this you should have a long thorough conversation with the mother,and say: This is what I know is going on,and these are the consequences of letting this man back in your life.Why would you sacrifice your daughters like that?If theres no getting through to the mom,then tell her that you care about her children,and you wont allow any kind of interaction with vince.Because,for gods sake, I mean,he did molest her kids.If you cant reason, what any sane bystander would do, is go to child protective services or see if there is another department out there,along those lines.But most of all,stay in her daughters life,and help her out mentally,and emotionally.Think of it like time travelling.Think of the future, with the present,and stop what negative turn out they may have in growth.Because the teen years,especially early teen years are important growing years.Thats what I got,good luck,and you can always talk to me about it further over PM,or AIM, whenever you want.I actually have a bit of experience with an older boyfriend/husband figure molesting some girls I knew.Its a fucked up experience to have,but what are ya gonna do?