Insatiable greed
Ning Yu however did not show any emotion on his face because he knew that the only way he could make sure that Shen Li's life remained unaffected was to make his wife think that the latter was simply useless. If not then he was worried that the woman would go ahead and find trouble with their son every now and then resulting in Shen Li getting divorced by his wife.
The same was happening with their second son, if not for the fact that he was avoiding them and was refusing to help them no matter how much his mother screamed at him for being useless and completely unfilial and did not know what was good for him. Ning Yu was sure that even his second son would have been divorced by his wife and sent to his maternal house, it was only because he was staying in the house of his wife without seeing his maternal family and not giving them any sort of help was his wife no longer threatening him with a divorce.