doubledown, my hat is off to you. To know this is happening and to improve yourself while not discussing the subject is a huge burden on you. It seems you are dealing with it a lot better than most could. While I agree with AnotherStander, I also see cat04 point. I think if you have lasted this long without discussing the affair, and you are putting the DB principles to use, then it is probably best to continue doing what your DB coach has advised. Good luck.
ME:51 W:46 M:25 S:22, S:20 Divorced 16/9/15 BD 10/12 W left 12/12 with OW, affair confirmed Nov/12. Dark since 6/13 I"m in a new relationship since Feb 14.