Because the mother-in-law treats the son-in-law as half a son, there is a saying that the mother-in-law loves the son-in-law and hopes that the son-in-law can have his own daughter, so the daughter-in-law hurts together, and the son-in-law usually gives the mother-in-law three points because of his wife. They are not in the same position. Generally, a man and a woman don't have so many contradictions.

Both mother-in-law and daughter-in-law are women and housewives. In a big family, they all have the same focal color, so there are many contacts and contradictions. Moreover, mother-in-law and daughter-in-law love a man together. The mother-in-law thinks that the daughter-in-law has robbed her son, and the daughter-in-law is worried that her husband is partial to her mother-in-law. Therefore, without blood ties and the joy and strength of the opposite sex, it is even more difficult.