If you bicker with your mother-in-law it might not be your fault.
Arizona State University researchers polled over 300 people about their relationships with their parents, children, and in-laws. They found participants were more likely to report poorer relationships with their mother-in-law compared to their genetic mother, and mothers reported having slightly less conflict with their daughters than with their child’s spouse. Another findings: fathers got along better with their daughter-in-law than their genetic daughter.
Financial resources and childcare were the most common reasons for arguments between mother-in-laws and daughters-in-law, and researchers note this is “striking” because both are “central to long-term reproductive success as resources and time and effort spent on kin care are finite.” Researchers add that arguments with in-laws are likely “influenced by genetic conflict,” as each person “unconsciously act[s] in the interest of their genetic kin.”
The scientists also say that fathers may get along better with their daughter-in-law than their genetic daughters because the father-daughter relationship may experience strain when the daughter enters a new relationship, but the strain may lessen over time if the father believes her partner strengthens the family unit. (Daily Mail)