There are great differences between families where one parent provides the income and the other cares for the home and the children, families where both parents work, situations where the parents aren't married with joint custody and situations where only one parent has custody.
Within those frameworks, BOTH parents should do their best to care for and contribute to the lives of their children. That means work together for the benefit of the child, be part of their activities and support them financially and in any other way they can.
Answered May 05, 2013
Edited May 05, 2013