Qiao Nan was not in their presence. If she was and heard these words of Old Master Feng, she would say, "Does Old Master Feng want me to contract the Stockholm syndrome?"
This tactic of Old Master Feng might be successful if it was used on others.
The problem was that the one that Old Master Feng encountered was Qiao Nan. She was not a real twenty-year-old young lady who would be bribed by this method of 'giving a sweet date after a slap' of Old Master Feng.
When Feng Meng was home, Feng Liang summoned him to the study room and carefully questioned him. True enough, he received an answer that was similar to Old Master Feng Liang's guess. "Feng Meng, next time, Old Master Feng will ask Qing Qing to bring Qiao Nan back for a meal. At that time, I will acknowledge her as my goddaughter. She will become your god cousin in the future. Do you understand what I mean?"