The facts had already proved that they were alone. They could never depend on the Feng family to give them a good life. In fact, the Feng family had nearly thrown her daughter into a fiery pit. With a family like that, why would Feng Cheng be willing to give up her only daughter for her family?
Feng Cheng could not be clearer about distance and importance of relatives at this point.
After distancing herself from the Feng family, the Feng family seemed to treat Feng Cheng and Shi Qing with greater respect and spoke cautiously as though they were their ancestors.
The more her family did that, the more united Feng Cheng and Shi Qing were. Did the Feng family need a favor from her daughter? Of course, they had a right to talk about it, but it would be her daughter's decision whether she would help them. She would not try to interfere in the matter. As such, the Feng family could not possibly accuse her of not treating the Feng family as her family.