The reality that you will see on this board again and again is that you really cannot make much progress at all with WAS as long as they are involved with an OP. You're simply shut out. You can do lots of work on you, but not on your marriage, because they are not emotionally available to you. It becomes a waiting game, or "limbo" as it's called, and only you can decide how long you're willing to wait for the affair to end.
Just saw this on another post - it echoes Sandi's point.
