After Shen Baolan was taken away by the police, Ma Sufen immediately phoned her son. Zhou Shuhuan replied with, "She brought this on herself," and then hung up. Clearly, he had no intention of dealing with Shen Baolan.
Ma Sufen was also angry that Shen Baolan had caused trouble for no reason, making their family the laughingstock of the entire residential compound. She didn't want to deal with it either, but ignoring the situation wasn't an option either. If Shen Baolan were detained, it would still be their Zhou family losing face.
But she had had quite an unpleasant run-in with Shen Mingzhu before, and couldn't bring herself to swallow her pride and apologize to a junior like Shen Mingzhu, so she encouraged her husband to go instead.