While you're waiting, go to Marriage Builders ® - Successful Marriage Advice
and read up their Surviving an Affair section. It gives you specific steps to take to end the affair and get your wife back. THEY WORK! I've seen people follow that plan dozens of times, and it almost always works to end the affair.
Now, does it get your wife back? Not guaranteed; that depends on what kind of marriage you had. But if she just got suckered into his 'ways,' there's a chance you can snap her out of it. But you have to act swiftly, decisively, STRONGLY, and give her NO option of continuing to contact him. You have to tell her: you either NEVER contact him again, EVER, or you leave this house. I will not tolerate cheating in my home. Your choice.
She needs to hear this from you.
But get the proper steps from MB.