I’d tick her off, for sure.
I’d tell her ‘don’t be cheeky, Madam’, with Auntie Chimpanzee stern face.
My niece (about 16 at the time) was rude to me, a couple of years ago, and loudly called me a terf in front of about 6 family members.
I am a terf, if you want to call a spade a spade, but she was very proud of herself, and enjoyed being so grown up.
I asked her do you know what that means, cos i knew no one else would know.
i told her ‘Be careful how you answer me, because you either knew exactly what it meant, and you’re trying to embarrass me, or you’re just throwing out words you don’t understand to sound like a grown up’
She’s a lovely kid, but, I’m not having that, and nor would I have this niece do it.