This is like giving up one's religion. This is an interesting idea. Grandma, you said that helping each other is our duty. Being good is our religion. All parents love their children.
All children love their parents.
Our mothers and fathers do everything to make our lives comfortable. They help us to become good people. All family members love us and help us. They do not want anything in return. Thus it is our religion to be good to our parents and other family members.