Personally, I think there is a line between being empathetic towards a wandering spouse, and having a conversation about how YOUR actions have hindered his relationship with his adulterous mistress.
Jeez, doesn't a line have to be drawn somewhere?
I would also be careful about speaking in absolutes, like "always" and "never". It's quite shocking sometimes what we find ourselves willing or unwilling to do in the midst of this marital mess. And trust me, if you said you would ALWAYS do or be something, then one day your aren't or don't, bet your husband will be SURE to point it out.
Bill
"Don't tell me the sky is the limit when there are footprints on the moon."