STOP ARGUING AND SAVE RELATIONSHIP!
It is better to stay away from an argumentative person, especially if his arguments are foolish.
We cannot win a foolish person in any argument, as we may need to lower ourselves to his levels.
In any case, it is better to avoid an argument, unless it is a healthy debate on an ideology.
In argument, especially with a close relative, we may not gain anything. If we win an argument, we may lose a relationship and if we lose an argument, we may feel hurt. So, both ways we are loser.
May God bless us with the wisdom to avoid any argument, especially with loved ones!
Tathastu! Swasti Siddham! Amen! So Be It!