Starsky309 is very right. If you read around here, you'll see that plenty of us have been told that our WAW had an affair when we didn't know or think they didn't. Yet, the truth came out. In my case, she was leaving me "to be alone, to find her true self, not to be in a couple", etc. Of course, she had an OM. Card29 found out after the 7-month affair was over and he was D. In fact, it's a classic script here: rookies arrive, say they don't think there's an A but there are a few signs and then after a few weeks or months, are flabbergasted that their suddenly nice-dressing and nice-smelling wife had someone. The change in attitude is also a big one. Oh and what about her cellphone? Could it be that she spends more time on it? That she's more secretive about it recently?
We don't know, but we've seen plenty of people in your situation and I still don't know one that didn't discover an OM later. It could be something useful to know (don't just ask her, she will deny and cover her tracks). Also, start thinking about your reaction.
Welcome to the boards, by the way.
M39 D6 D3 (at S) S 2014-09 D 2016-09
"You can't start a fire sitting around, crying over a broken heart" - Bruce Springsteen.