This sentence expresses an ideal state that the mother-in-law and daughter-in-law do not need to deliberately maintain a special relationship, but can get along naturally like ordinary family members. In a philosophical sense, this reflects a yearning for the natural nature of human relationships, that people should build harmonious relationships based on mutual respect and understanding, rather than being limited by identity labels or traditional role expectations.
This view emphasizes equality and freedom, and believes that both mother-in-law and daughter-in-law should be free from the shackles of traditional ideas and do not have to deliberately change themselves in order to maintain a certain image or role. In this relationship, both mothers-in-law and daughter-in-law are independent individuals who are able to appreciate and support each other based on their individual qualities and behaviors, rather than just because they are mother-in-law.
However, in real life, due to different factors such as culture, educational background, and personal personality, it may take more effort and communication from both parties to achieve this ideal mother-in-law relationship. It requires a deep bond between mother-in-law and daughter-in-law based on shared values and mutual understanding, so as to achieve a state of natural harmony that does not need to be deliberately maintained.