About 6 years ago while on a business trip. She suspected, I stupidly denied. Biggest mistake of my life.
Why do you want to be married to a woman you didn't have enough respect for to be faithful or honest to?
I know it's all in the past (for you) but if you didn't care enough about your wife not to sleep with another person or was even worried that you might catch a STD and pass it on to her because of your cheating, why do you think she would give you any more respect than you've given her?