I haven't been keeping up with all the forum stuff lately, but just have to jump in here....
All of your children will be safer now that your eyes are wide open. Talk with them all regularly....even the boys....about how to react if someone makes them uncomfortable in any way. Talk about inappropriate secrets. Talk about the lies predators tell and the ways they get children to keep secrets.
And most of all, trust your instincts and keep your kids close, and teach the older ones to keep an eye on the younger ones and on each other. Don't let anyone be alone with one of your kids.....for example, if one gets a babysitting job, you drive them to and from, or insist that the wife ONLY drive them to and from.
Don't force your kids to have physical contact with anyone. I have had many parents tell their kids to give me a hug. No. I don't allow it unless the child shows a lot of enthusiasm for me and wants to hug me....if there is the slightest bit of reluctance, I quickly stick out my hand and say, "How about a handshake?" The kids love that. The parents get a tactful explanation right then if possible (the kids need to hear it, too) or later if for some reason it is inappropriate at that moment. Children need to know that they do not have to have ANY physical contact with anyone if they are not comfortable with it, and that they can say no to any adult about this. As you know, most predators are someone the child/parents know well. Or think they do.
You are doing a great job and your daughter will grow up to be strong and secure and well-adjusted, since you talk about it and took action. You cannot prevent everything, but you sure can create a healing environment. She will grow up to be twice as strong and no one will touch any children on her watch! She will be a champion. Thanks to you.