I think she will have an interesting story to tell, if she chooses to some day, but that's it. I doubt she'll have any long-term negative psychological impacts, unless the family is more dysfunctional than we have heard. Hey, she can say "I was born for a reason" which is the old "why am I here?" question some people spend their whole lives wondering about!

It is something ethically difficult, that each person will have to make their own mind and heart up about. I am glad I have never been in their situation.