I was playing in the kitchen of the hotel, and the aunt who served the dishes actually took my kitch

You can't scold her, scolding is an uncivilized sign. You can politely say to her first, Auntie, please don't use mine to chop ice cubes in the future, because the knife is dull and not easy to use after chopping! After saying this to her, the next time she says something like this, you warn her again.

Don't scold her, the boss knows to scold, because she will cut the refrigerator.

It's not that serious, people are selfish, and she said she was worried that her knife would be dull or dirty. Don't take this seriously, just talk about her.

It shouldn't be, because she's older than you.

Forget it when you're old, just talk about it.