Am I overreacting? Wife flashed boobs

This is pretty straightforward. My wife and I were hanging out at a friends house. Our 12 years olds are best friends and they do sleep overs. We usually stay for a beer or two when we drop them off. Well on this occasion my wife ended up consuming a couple too many. While she was outside with the other couple the two wives ended up flashing the other husband their boobs. I didn’t witness it, and she confessed to it when we got home later that night. I honestly felt betrayed and embarrassed by that. We aren’t in college anymore and these are some of our adult friends in a very small town. What do people think?