No. Revenge hurts.
I've done my share of vengeful "I am God" style crap. It is like crack. Might feel good for one instant, then a whole lot of mess to clean up afterwards. Rots you inside.
Besides, it usually ends up furthering the losers agenda. Unless you were to kill them. And even then. You've signed on voluntarily to their game, their turf.
One thing I need to say here. The OP has made some decisions along the line. They didn't turn out with outcome wanted. In fact, the person used it cruelly against her.
Those decisions were hers though. To give the money. To delay school. Own it and the dreams of busting his ass will leave a lot sooner. I promise you. You can start fixing and righting your life as you see fit, not in response to your pain.
Revenge. Ha. That would delay the time when personal responsibility and the others responsibility in all this gets disentangled. Blaming wears thin.
The hardest thing is forgiving yourself. Forgiving them means nothing, getting square with them. It's about yourself really.
I wouldn't sacrifice what I learned about that for anything. Only the hard and high road can teach you some things you might need to learn.
There are all sorts of bastards and wounded people in this world. And the truth is, the world isn't always just in the ways we want.
If you go through with this, you might find that the wife will listen: and go right back. They often do. You might end up 'alone' in this.
I can tell you that it has been really hard for me to share info with someone else involved in the deceit that hit my life, only to have them share and listen as a friend. To grow to care about them because it all was so HONEST. Only to lose that person too....and watch them get hurt.
I'd do it again though. I do think it is mainly about re-defining yourself.
Take the road that will be in accord with who you really, deeply are and want to be. You can't go wrong with that.
sorry to ramble so long.