I Caught My Wife Cheating: What Do I Do?

I do say it and will continue to say it,i don't cheat on my woman and don't expect to be cheated on. The day she is caught will DEFINITELY mark the END of the Union. Do unto others what you  want done to you. As simple as ABC.

KARMA

I have just found out that my wife has been cheating on me for at least 8 months.  She suspects that i know something, but I have not confronted her yet.  The reasons i am hesitant to confront her vary from financial to depending how angry and depressed i am, plotting my revenge.  The question I have and why i am turning to you is that I am not really in any condition to be making life decisions right now.  I would like some level headed advice as to what to do. 
My wife has a second cell phone in which it is plainly obvious that the person she is texting, she is having sex with.  She doesn't come home after work,  instead of going to the gym,  she meets him at the Days Inn.  I have the reciepts of the times that she went and paid.  She has a seperate bank account and a secret email account.  A secret life. 
I know that most of these posts are about should i forgive my wife for cheating.  I say do so at your own peril.  I say forgiving your wife is the risky decision.  I say this because I have forgiven my wife the last time she cheated on me and that decision has landed me here,  again.   Last time my daughter was 12 years old when it happened and now she almost 17.  Her well being was part of my decision to forgive my wife the first time, however I beleive that she is old enough now to handle Mom and Dad divorcing.  At least understand it better.
PLEASE Please someone respond to my post.  I am in dire need of advice.  I am not thinking straight.