Marriage is definitely over and my wife is really trying to annoy me. Should I tell her about her sister?

[Nancy]

if she is doing those things then maybe she is same as her sister, its up to you to tell her or not but it depend on the court case that she could use for it. just ignore her and feel happy that you have your freedom after all. don't waste your time, your life for women like her, because at the end you will feel guilty or you will be really guilty, stop this before things gets worst, save your selfe from problems, prison or probation. even her sister is her sister not yours, they could claim rape, voilence and more other things that will put your life in difficoult situation.