CL, you owe this person no courtesy, gosh I had no idea he was 20 years younger than your wife, besides having a thing for older women he obviously has a lot of problems but none of them are yours unless he intrudes on your marriage again. If the email thing works for you that's fine but always be on the look out for face to face verbals after all hopefully there will come a time when you are both face to face and an email just will NOT do. Never underestimate the power of the human voice or touch.