Seriously as I stated in my previous post. Sounds like currently the one who needs to have some help on this situation is you. If you thing revenge is going to make you feel better let me share with you from experince that it wont. It never does. And eventually it does catch up to you.
What happens if you vent this venddetta against the guy. It cost you legal action, jail time, Loss of your Job, complete loss of your significant other, Loss of the repsect of the peers you have around you or more? What if what you seek creates worse issues for your life then what this is and exists? Remeber for every action there is a reaction. Your actions could bring on reactions you may not want to invite. Chances are that will end up being the case. If your other half and he betrayed you and were unfaithful, Its not just he who is at fault unless it was rape. Then in that case he should be in prison. If it was of volentary action from both parties and your trying to work with your other half to get past it and move on... Part of getting past it and moving on with her means you leave him and all thats involved for revenge behind and work hard at working forward to the future. Its always easier said then done.. BUT Just like anything else difficult its worth doing and as you take one step towards the right thing to do and continue the passion you have for revenge will fade and be gone. The hardest part is starting down the right path and sticking to that path. But it can be done. Have you thought about getting someone as a counsler or therapist for you and your other half? How about for yourself? sometimes we just need some guidance from time to time.. Trust me we all do.