In answer to you letter to me via the blog, I can understand that as someone who has grown up with the family, you may think that you have a good understanding of what the real story is.
However, unless one lives with that family, they have no way of knowing. Families are great at keeping secrets from outsiders, and sometimes even from each other. There are many cases of sexual abuse where even therapists believe that the mother always knows, but research has proven that that just isnt so. When the abuse is happening in the home, family members often do not know that it is happening. Therefore, it is even more difficult to know when abuse is taking place in someone else's home. There are rarely clear signs.
While I am glad that it appears that that these particular family members that you mentioned are doing well, again, you have no way of knowing how people are really doing. And of course there are many who have been traumatized, and who are able to put their lives together, and do very well.
Regarding why the blog writer's story changed: Children who are coping with trauma use any method to survive, just as adults do. That can include changing the story and even lying. Though, usually the lie is that it didn't happen when it did. I ask you, why on earth would someone tell a story that would have her cut off from her family, and be ridiculed by her community? How could she have benefitted from these accusations. At minimum, something is not right in this family that looks so functional on the outside. However, the chances are quite strong that she is telling the truth. This same woman, in a more supportive environment is thriving and helping a lot of other people in need.
And finally, her chosen method of speaking the truth took her many many years of hard work to finally arrive at the conclusion that her silence was not helping anyone. She rightfully believes that if she can be brave and stand up and tell the truth, others will follow, knowing that they do not have to go through this alone. Here in Israel, religious and charedi communities are getting more and more educated in this area, and it is changing the way sexual abuse is being addressed and handled. It is a very difficult issue to deal with, but the alternative is that the cycle of abuse will continue to hurt more and more innocent children.
All the best,