You shouldn't tell your friend's kids what to do.
Harry's son plays with his neighbor's son all of the time.
Harry wants to be a good mentor to both boys.
Harry notices his neighbor's kid just copies his son's homework.
Harry tells his neighbor's kid he needs to go to church with them in order to be saved.
Harry's neighbor thanks him for bringing it to his attention.
His neighbor forbids him from every speaking to his son again.