From Yin Jingfei's narratives, Ling Qingyu already guessed what happened next. Playthings never ended well, both in real life and in the fiction, if the people involved had no experience and raised their hopes high.
Of course, Yin Jingfei's sister might not realize her state yet but would be soon ashamed and have her mood turn downhill. Or since Yin Jingfei stated a problem, Ling Qingyu understood this meant the little girl likely suffered the brutality and cruelty of life.
What Yin Jingfei said next confirmed her guess. Showered under sweet words and depiction of material fulfillment, the girl succumbed. The rich boy exploited the situation and played with her feelings.
When the girl discovered the man was merely playing around and wasn't as serious as she expected, she was devastated. Her younger brother found her situation and stood up.