Be honest with her. Tell her that you really appreciate the offer and it's not that you don't like her wedding dress. Tell her you are sure it was beautiful and fit her just right when she wore it, but things have change, and you want the once in a lifetime experience of picking out your own wedding dress.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.