You just sound like you want too hurt his wife just because you can. Because you're finally in control of something, whilst everything else around you is crashing down.
I want to share a story with you.
I had a friend once, she started an affair with a married man that she had known for a while (and knew his wife) She was single and just thought it would be a bit of harmless fun. Except, she fell for him and hard and no longer was content with sharing him. She wanted him all for herself.
He too, gave deadlines and reasons why he can't go just yet. It was always a special occasion coming up, or a birthday, or a holiday, or his goldfish had died kind of excuses.
She waited patiently for over a year, being his dirty little secret and hanging on too his every lie. So she came up with a plan. Why doesn't she meet with the wife and show her all the proof, because then wife would kick him out and they could be together like he had been promising. I mean what could go wrong?
Except it went very very wrong. Because rather than do it face to face, she posted it on Facebook and tagged the wife with some screenshots attached. She described the woman's bedroom, the man's body - basically anything she could which would validate it's true.
Did the man thank her? Did he fuck.
He lost his wife, got kicked out of the family home and lost a lot of friends.
Did he run straight into the arms of my friend? No.
She was genuinely heartbroken and couldn't understand why, he didn't get with her. He was now single after all. The man never so much as spoke to my friend again after her little stunt.
I'm guessing I'm telling you this because, I think deep down you know he won't leave his wife off his own free will. And the way you are writing it sounds like you're contemplating telling his wife in the hopes of pushing his hand. It won't work and it will massively back fire.