I feel the best thing you can do is sit back and continue to work on yourself. If you put pressure on him and Nasty "B" (AKA OW) put pressure on him he will probably implode. Its a given that "NB" is and will put a great deal of pressure on him. If you don't and appear to be the calm, cool, and rational person, then who will he gravitate towards? My guess is "NB" will drive him away with all the pressure she will put on him. Time is on your side.
Twisting on Life's Rope Me53 W53 M20 D21 D19 D16 BD 2-2013 D final 1-2015 _________________________ "Dream about tomorrow, Live for today, Learn from yesterday"