Snoopster:
I hope this doesn’t come off poorly; but my sense is that to the degree that you are reading this situation correctly, your wife doesn’t need to be porked by another man, however much you may want that to be, or think it would help her.
What I’m getting from your post is that she needs to heal from her wounds. This means doing the very difficult yet thoroughly necessary shadow work to process and come to terms with her broken psyche and integrate it into her personality and find peace in herself.
You might also consider whether broaching the cuckoldry thing is in fact triggering her on the unconscious level which may be exacerbating life on the conscious level.
Please explore ways of helping her make peace with her past. My guess is that she likely won’t agree to therapy at this point. But you can still educate yourself in these things, and work on a strategy to redress issues. As things stand, I’m hearing that she must have checked out of the relationship quite some time ago.
And that is truly sad.
I wish you both all the best.