[sc_rufctr]

There's no need to over analyse this situation.

You're ex wants to catch up. Big deal but your wife wont understand if you tell her. That's just how women are.
Would that stop me seeing her? NO... As I wrote before curiosity would get the better of me. I'd have to go.

Should you go? That's entirely up to YOU but I would suggest that you go. Life is short!

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About 4 years ago I accidentally met up with the sister of an ex GF from more than 10 years ago.
I always liked "the sister" so we went on a dinner date.

My ex GF found out about it and she sent me an abusive email! Note this is 10 years after we broke up!

(The dinner date, We had fun but nothing came of it but we're friends on Faceplant so occasionally I see the ex's comments on "the sister" news feed... lol)