I am so sorry this has happened to your wife and family. It takes alot of courage and strength to tell others what your family has experienced. Unfortunately, the JW world does not deal with trauma or any traumatic experiences without telling you that Jehovah will take care of it. It is simply not true.
I would encourage your wife, if she has not already done so, to seek some professional help to talk through this horrific events that have taken place in her life. The fact that she has buried it in her mind and she is just recently remembering shows that it would be good for her to speak to a professional counselor that deals with sexual assault. It was not her fault that this happened to her everyone needs to put the blame where it belongs...on her father!!!! Also an organization that is hiding the fact that this has happened. Those brothers are to blame as well.
I hope you coming back here Nordic, we are concerned for you and your family. Please let your wife know that we are thinking of her.