what do you want...
to be right
or to be married

decide because it is important

you can keep badgering your wife until she says, you are right...I lied, I cheated, you are better and then you will have lost her

or

you can assume she had an affair, she regrets it, she wants to try again and let it go...

this is a chance to begin again

you can't begin again and go forward if your are stuck looking out the back window