walk on eggs/eggshells idiom
小心翼翼地做事；小心谨慎
If you are walking on eggs/eggshells, you are being very careful not to offend someone or do anything wrong.
When my mother is staying at our house, I feel like I'm walking on eggshells. 当我妈妈住在我们家的时候，我凡事都要小心翼翼。