Battered And Scared(I'm so sorry)

Walked in on my wife having sex with her personal trainer (not her friend, not their coach). She didn't even try to hide it. I walked in and saw her getting physical with the guy while she was warming up for a workout/competition... As soon as I saw that she had pulled back her shirt and underwear, both of which were exposed.... My wife started crying saying how disgusted she is and how hurt she is... I tried talking to her about it being an accident but after half hour I just can't think anymore. We talked a little more and after 30 minutes or so we decided it's.