Because she felt that Princess Katherine was indeed quite... quite pitiful.
She was noble in spirit, but then Kang Chen made it impossible for her to be a princess anymore. She raised a son, only for the son to belong to the Kang family, and now he's recognized his roots and returned to the family. After all that effort, she was left with nothing, which really is quite tragic.
It's understandable for Princess Katherine to hate the Kang family so much.
Xizeer noticed Ming Mei's embarrassed expression and said, "Let's board soon, or we'll miss the flight."
Princess Katherine glared at Xizeer, "Just keep protecting her."
This kid really made her uncomfortable. How good could Ming Mei possibly be, for him to treat her like this?
Before leaving, Princess Katherine shot a fierce glare at Ming Mei, then turned and stormed off in her high heels.
The plane took off less than five minutes after she boarded.
