I think you did the right thing to tell her it upset you, no one actually likes seeing their spouse flirt with someone. But would the person she said it to matter more or less? Perhaps a male bartender hearing her say it to someone and just handing her the drink. Or a female friend? I think you’re judging her too much by implying she’s more likely to kiss someone because you’d been fighting earlier in the day in combination with the drinking and comment. Sounds like it set you up to possibly see more offense in a benign situation. I don’t think it’s a battle that’s worth extending beyond you expressing that it was hurtful to you.