Am I overreacting wife called another man handsome

I 38 m and my wife 34 f were visiting her sister 26 and nephew 5 for an early Easter celebration. We were having a great time until my nephew asked my wife to help him with the egg hunt and she said "of course anything for a handsome young gentleman". Which made me mad because I should be the only handsome man in her life so I got in the car and started driving home.

Once I finished the 2hr drive I noticed a text from my wife asking where I was and why I left her stuck at her sister's. I told her I don't appreciate her giving other men compliments crossed a boundary and I didn't want to sit there being disrespected.

Now her whole family is calling me an insecure asshole but I think I reacted how any man either self respect would so am I overreacting.