Add this to the long list of good reasons not to have kids. Your sister is a whore, not for masterbating, but for doing it in your presence knowing your aware. It's inappropriate for the two of you to be sharing a room andto see each other naked.
NO ITS NOT OK TO WATCH YOUR SISTER MASTERBATE. TELL YOUR PARENTS WHAT SHE IS DOING.
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.