Cathy, Drop the rope! I can tell you that lately, sometimes my "gut feeling" has not always been right! Sometimes what we think is a gut feeling is nothing but our hearts speaking!
So what if he was with OW, HE IS HOME WITH YOU! And to me this is a big step. Concentrate on more important things, OW is fading into the distance! She is only there for a temporary fix, usually while you H is drunk and not sobber, HINT! She was only a temporary fix, a fantasy, a toy; those things never last and she should have known better! Hold your head up high, your H is where he wants to be. you need lots of patience(you have it in you) and time to heal. All good things come to those who wait!