"Mr. Nice Guy" never works. I have NEVER seen it work.
Seek out Gucci Loafer, and read his other posts to people. It's time to take a much stronger stand with your wife, and for your family.
Go back and re-read what I posted to you a month ago on your other thread. This is exactly what I warned you would happen if you didn't confront her, and you're losing time by the day.
Marriage counseling doesn't work when one partner is having an affair. Save your time and your money, or -- better -- spend it on IC for yourself.
Your wife knows what she's doing is wrong. She's probably wondering why you haven't stood up to her, and is losing respect for you every day. And, since women tie their feelings of "respect" very closely with their feelings of "love," you can see what your challenge is here.