You have a housegirl/houseboy and you have children also. Your housegirl/boy does something bad, and you beat him or her, almost killing the child. Your own children does same thing or even a worse thing, and you overlook them. Sister what are you doing? You are training up another man's child and spoiling your own, and that is foolishness, not wisdom or love as you think.
Even among your children, you beat the one you hate all the time and leave the ones you think you love. Sister that is foolishness. A child you love is even the one you should correct so that he or she wont go the wrong way and become a better better person in future. That is why the Bible said that whom the Lord loves, He chastises.
If it takes beating, punishment, correction by words etc, do it for the sake of that child's future and for your own good too, because if that child grows up to become wayward or a menace to the society, you will still be the one to suffer it. That beating will not kill him or her, neither will the child cry blood. Prov 23:13 says "Withhold not correction from the child: for if thou beatest him with the rod, he shall not die."
Its better for that child to cry now and become a better person in the future than for you to cry in future because of his or her waywardness.
Parenthood is a call to duty, not just being responsible for their birth, but also being responsible for their good upbringing.
Many parents are in sorrow today because of their failure to do their duty as parents when their children were still young. They thought they loved the child and doesn't want to hurt the child or make the child see them as wicked parents. But they never knew they were preparing the child to hurt them, hurt his or herself and the society at large.
"Train up a child in the way he should go; and when he's old, he will not depart from it." (Prov 22:6)