And, once again, a guy not respecting his wife's work.
You've read exactly one side of this.
Men and women can be friends and hang out - even without their spouses and SOs. Amazing!
And like I wrote a few years ago, the OP doesn't pay attention to anything else his wife says about work -- just about this other guy. If he actually bothered listening to more than the jealousy-inducing stuff he wants to hear, then he'd find it's probably nowhere near as big as he fears.
I also looked at both images and neither of them scream 'cheater' to me. They scream 'coworker' to me. And yes, I am female. And married. And I work. And I've had male coworkers pay attention to me and befriend me. And ya know what? I never cheated or so much as considered it.
The fact that those work pals had penises did not suddenly magically turn me into a cheating machine.
Is the OP's wife cheating? Probably not. None of this is evidence of anything at all, one way or the other. As was also suggested (also a few years ago - please read the dates on the topics; yes, I know they're in small print), a conversation was in order. As in opening mouths and having sounds come out and communicating.
You knock this guy's teeth out and he's innocent? Then you can kiss your savings goodbye when he sues you for civil battery and gets you arrested for criminal. You knock this guy's teeth out and he's not innocent? Guess what? The same thing happens. And either way, your wife ends up looking for another job because YOU poisoned her working environment. I do hope you like it when she's pissed off at you ruining a job she likes.
Knock off with the macho ****. It doesn't do anyone any good. Grownups have conversations and ask questions and they don't jump to conclusions. Leave that **** in middle school where it belongs.