Consider yourself an extremely lucky guy. I'm in a similar situation where the affair boy turned out to have lied to my walk-away wife and their affair ended. However, my wife had to go through such destruction of her feelings about me to deal with her guilt she has not come back. She had to explain to everyone why she was leaving such a happy relationship so he had to lie in some very awful ways and did not take a single photo or memory item from our entire almost two decades together (?!?!?!) So, she doesn't feel she can come back. She's brainwashed herself and is in deep MLC.
So thank your lucky stars she came back so quickly. Trust me, I know the hurt and other issues are very difficult. However, they are NOTHING compared to having your wife back at home and the affair ended so quickly.
You can survive, heal the hurt, and since you have your wife (which I would give _anything_ to have this chance) you really are in a once-in-a-lifetime positive situation.
See your situation as very very positive. Yes, there are some things to work through. But, read the book she recommended, talk to a good professional right away (Divorce Busters or Marriage Builders) and trust me it is money well spent. You want to do things right just now and some of the right things are non-intuitive.
Please do these things, spend the money and be very careful to do things right. Let her heal first, then have you heal too over time.
And thank the powers that be that you got a second chance. For those of us that may not get one, it is the most precious thing in life. A second chance for me would be better than the birth of my child and I would want nothing more.
I don't mean to be dramatic but you are very very lucky. Be very very careful in doing the right things now and working the steps above. Best wishes.
