talk to them and try to tell them to avoid sinning
you can help them by asking if they think what they are doing is right
think about what you are doing
it will end in tears
don't do that because I can't be your friend if you do
people will get hurt
you will get us all in trouble
people will think you are nasty
Teach him the way of God
Be a good example to him/her and show kindness to them.That's the best you can do.
Tell her that God is always watching and think of that next time she delibrately disobays.
