The mother (sides) with the son, and the daughter with the father.
Note: This is a reference to the alleged tendency of Irish mothers to dote over their sons. It is even felt in some quarters that this tendency still prevails in Irish American families! Likewise, the seanfhocal notes a daughter’s likelihood to side with her father. It is interesting to note that the seanfhocal speaks in terms of females, the mother and daughter. No mention is made of how the males behave in such situations, or even if the males are aware that such interpersonal dynamics exist.