As the person who was unknowingly brought into a fucked up marriage - and in their case, unlike you, they failed to realize how broken their marriage was - I say don't do it. I was a pawn in the game and ultimately disposable. I was devastated. You guys know your marriage is fucked up. So what do you really have to offer in the way of love and consideration?
Btw, this whole keeping score: "she cheated worse than I did," isn't going to work for you in the long run if you want to maintain your relationship. You both cheated. Period. The question is why? You're fooling yourself if you think you're less culpable because you didn't go as far as she did. Once you both stepped over that line, the game changed.