I'm sorry that you are going through this, but you have come to the right place.
Why don't you give us some more info on your sitch if you can. How long have you been married? Kids? Their ages if you have them How did you find out about the OW? My H has never had a PA/EA so I am not sure how to answer you on that one, but we have lots of vets on the board who will give you excellent advice.
"Everyone you meet has baggage. Find someone who loves you enough to help you unpack." ¤Formerly DelinquentGurl¤