I'm 37, married for 10 years, two kids. Squat: 265 lbs, Bench: 175, Deadlift: 295. Wife is hot, we have regular sex.
Yesterday I was with my wife shopping some food at a big store. We were late and while she was picking food up and putting it in our basket a security guy come to us and told us that the store is closing now and we have to go to the cashier to pay the money. It really was late, and we really had to finish our shopping and the guy told this to us with respect and in a calm voice. I told him that we finish first picking this particular food and then will go to pay the money, but my wife suddenly turn on bitchy mode and told the guy "Why do you even talk to us in such a nasty tone! Who are you?! How can you behave with me like that..." and so on. It was unexpected and unnecessary. But after she told it she suddenly turn off this bitchy mode and went on with her shopping.
As she was far from me at that moment I couldn't immediately stop her telling her to shut up. For a few seconds I just stood there embarrassed. When I wake up from this it felt to me completely beta to catch up to her and to tell her off.
Now my question is, how to handle this bitchy behavior in public when it is not towards you, but towards completely innocent person? I fucked her the whole week. The night before this has happened I fucked her really hard and she gave me a solid bj. If she was acting like this with me, I would treat this like a shit test, but she was acting like this with a complete stranger and it looks like at that moment she was just being a bitch.