In every family there may be arguing and disagreement, between parents and children, adults and other adults, or amongst the children. This is normal. What is important is how a family deals with conflict.
A good way of dealing with family conflicts is to make sure that everyone has a chance to speak and everyone really listens to what each person says. Speak and act respectfully. Encourage all family members not to use insulting or shaming ways of talking to each other. This is hurtful and can damage family relationships.