OK, that can certainly be construed as something going on between them; but it's also not concrete proof of an affair, either.
You can do as you feel, but I think you're going to inflame the situation and not make much progress. He won't admit to an A.
Me: 44, Wife: 39 M: 17 years T: 20 years Bomb on 08/25/09 1/13/10: MC started 1/28/10, 2/8/10: More bombs 8/28/10: Wife moved out No talk of D, no movement