I am not sure that I see much good to be gained by me going. If I take a date, it could very well backfire when W sees it, or it could make her jealous. The lady I would take would be more beautiful than her.
And if I go with a date, it may further justify to W that she is in the clear to continue pursuing OM and not have a concious about it.
I think it would do you a lot of good to go Kevin, specifically, with a date. You would have fun, you could interact with your date and others, etc.. How could it backfire? Your wife doesn't need any justification to continue with her actions...she's been doing it despite everything that you have done. So what if it makes her jealous? She's cheated on you, admittedly, with several men now for a long time. You would have a lot more going for you than just your date being more 'hot' than your wife! It would do you, your confidence, and your self-worth some good.
Your wife already believes that she's in the clear to continue her actions...she's been doing it for a long time now, and with multiple men! NOTHING you do at this point is going to justify to her that it's OK to keep doing what she's been doing for a long time with different men! She's already OK with what she's doing...obviously.
You have NOTHING to lose by taking that 'hot' date...and you have a lot to gain by doing it.
ps - I'm on your side.
"Always go straight forward, and if you meet the devil, cut him in two and go between the pieces." - William Sturgis, clipper ship captain, 1830's.