The next time he goes on a RANT about how much pain he's been in...
"I've felt in a lot of pain too... but I didn't LIE to you and mount someone behind your BACK to make ME feel better.. I got FAMLILY involved... YOU just HURT more people... I didn't HURT YOUR family or your kids, YOU DID"
"When you got hurt, you walked all over everyone, when I got hurt, I got everyone to stand up and HELP us... how am I the bad guy here? I think you are NOT even BOTHERING to think about how HURT your WIFE feels about you having SEX with another woman while SHE works to SAVE YOUR MARRIAGE buddy!"