I'm sorry you're going thru this. Doesn't make it any less painful, but your wife is pretty much following the wayward "script" right now -- it really varies very little from sitch to sitch. What she is doing with most of her complaints is called "re-writing marital history." Rather than focus on the bogus complaints, try to really take this time to do some introspection and focus on "those things that sting" -- that is, those things that YOU know are REALLY things you really do need to work on to become a better man and husband.
Is this other man married?
It's been two months . . . what have you tried so far in the way of boundaries, or self-improvements? Have you read DB or DR yet? Sandi's 37 Rules on this forum?