“What did you just say?!”

The pitch of a woman’s voice suddenly went a few octaves higher, making the housekeeper who was in the middle of cleaning the living room tremble in fear.

A young lady who was playing with her cell phone on the sofa looked up at the woman who was on the phone and asked, “Mum, who’s calling?”

In her impression, her mother had always been an elegant, soft-spoken woman.

The...