The Catholic view is that men and women are equal in the sight of God. In marriage, each is to sacrifice himself or herself for the other. They are to build a family together through cooperation with each other and mutual respect.
There are differences in the roles they naturally play. Women are more natural caregivers for children, and men more naturally work outside the home. Yet women can and do work outside the home and men do act as caregivers for children (changing diapers, feeding babies their bottles, burping them, walking with them when they are crying at night–men do all these things, just as women do). Their roles tend to be focused in one area (caregiving for women and working outside the home for men), but one can fill in for the other whenever needed.
Where there is an absolute difference in the roles the two sexes can play is in the giving of life. By natural law, only women can give physical life by serving as mothers. By supernatural law, only men can give spiritual life to the faithful by serving as priests. Women have the privilege of being intimately associated in the giving of life through birth, and men have the privilege of being intimately associated in the giving of life through the priesthood.
Mary displayed the fullest extent of the maternal calling by becoming the Mother of Christ, who is God, while Christ displayed the fullest extent of the priestly calling by becoming our High Priest before his Father.