I realize getting pissy wasn't the best reaction. I was having trouble articulating myself in a way she could understand, most likely because the situation just bothered me. And she was upset with me. I can't blame her.
The thing is, she's been on multiple dates with guys before without me meeting them early on. I'm having trouble figuring out why this one bothered me so much. I think part of it was because we hadn't spent a whole lot of time together that week already. (She had been out with this guy twice, and with another , the guy I do like once). But I don't think that was all of it.
We haven't talked much about the situation since then. Apparently it freaked this guy out enough that he hasn't contacted her since. I feel bad about that. I'm a big guy, and can be intimidating unless you talk to me, at which point the teddy bear falls out of my mouth. My wife is not that upset. She didn't see anything long term coming out of it.