Wife abandoned me...Now What?

[Deep]

Sorry you find yourself here Mike, but you sound ok - relatively speaking and considering the circumstances anyway .

It sounds like your wife went to C partly to lessen her guilt and to justify (at least in her own mind) what she was doing.

You'll find it's amazing how the typical WAS falls out of love, does not ever think they can be in love again with you, only wish they could feel that way again etc when there are 3rd parties involved. You're not unique in that sense. It's all (you guessed it) script.

Your W is still revolving her emotional fix around OM or similar. Just be the best you you can be, and someone whose life does not revolve around her, whose happiness is his own call. Stop comparing, judging, second-guessing etc. That includes the tennis / swim thing. Go if you feel like it. Don't if you don't. If she is doing it purely out of pity / guilt, and you are going hoping to see some spark / remorse, then please go catch a movie with someone else intead. That's my personal view.

Good luck.