I know he's just venting but...talking about it all day, along with OW withdrawals are *definitely* going to affect his mindset when he sees her, how he talks to her, what he's thinking about when he gets home...it's all bubbling up inside him and he wants to say it but is "waiting". She knows something's going on--we chicks are intuitive like that. And thinking affects behavior, kwim?
I guess what I was saying was for him to focus on himself and his personal goals during this time. It will be a much more productive way to while away the hours AND there will be no temptation to blurt out his thoughts and set himself back. Plus, it's gotta be done, anyway.