How do I tell my wife I cheated on her?

Before we met, my wife was having fun. She had a “hoe phase” and her “body count” is 15 or so she says. She’s been my one and only. I’m very shy around women. My coworker and I work very closely due to our job. Over time we grew closer and before I knew it we were texting all night day on our days off and we’d go out for drinks after work (just the 2 of us). After some drinks recently we had sex. I guess deep down I’ve always been jealous that my wife had her fun before we were married and I never got to experience other women. My coworker and I have had sex multiple times again since. I feel so low. How do I tell the love of my life, my best friend and mother to my little 2 boys that while she was at home with the kids I was having sex with my coworker. I don’t want to tell her but keeping this a secret is eating me up. What makes things worse is the sex with my coworker is better than the sex with my wife. I think that’s why I keep going back. I don’t want to tell my wife because it would shatter her. Maybe she doesn’t need to find out if it’s just these couple of times?

How do I tell my wife I cheated on her?
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