You poor thing and his poor wife too, I'm glad she has been receptive to you and you've both been kind as it's him at fault only!
I know you feel like you want revenge now but please, please take a step back.
I PROMISE that the best revenge you can possibly have is to totally disengage, never speak to him again, don't involved with his wife's next moves, nothing nothing nothing.
He'll be expecting the both of you to do the 'pick me dance', to send him long angry messages that only serve to reinforce to him how much he made you love him, to be angry so he can call you mental to other people and use that to twist the narrative of what's happened - he will do something like paint you as a one night stand who got obsessed and 'wouldn't leave me alone' etc.
Honestly, I promise, the best revenge you can get is to absolutely cut him off, cut off any involvement in what happens to him next, block on all platforms and never EVER reply to him if he messages you.
And have some counselling over Skype - if you can afford private then great but if not and you think this is a mental health crisis likely to spiral, call your GP to get on a waiting list for counselling.
In the meantime the MN army are here for you. It's so heartening you and his wife have been kind to one another and recognise there's only one cunt in this situation... and now he has neither of you! 