To be honest I'm a total flirt and love attention on a night out so I'm probably not a reliable source but I wouldn't say you did anything wrong!
I think every marriage should have a bit of "breathing room" so that you don't feel bad for being chatted up/flirting a bit/joking about. Obviously if it goes further then that's a bit worrying but it doesn't sound like it did?
Don't beat yourself up you were out having fun, life is too short not to soak up the compliments

Cent x
PS you must be a very yummy mummy, I think I will be written off forever when I have a bubba