Question

Why is it important for nephews nieces to be good friends?

Answer 1

Because after all they're still in the same family, and if they don't get along well, especially when they're older, arguing will often happen and they cannot solve serious problems

Answer 2

It is really important for nephews and nieces to be good friends because there are related family members. They must all be one; defend each other, play with each other, and help each other. 

Hope this helps!!