We must not allow ourselves to become the Judge, especially over those who are already in the hands of the Lord. It is our duty to teach the Lord’s will, to apply it in our own lives, and to help others in the understanding of the Lord’s will. We are not the Judge (James 4:11-12) and therefore we will leave the judgment of your mother and father to the Lord. Be assured that no one will be lost who does not deserve to be there. God is righteous and we can trust Him to be a fair judge.
However, we are not dead, and we will be judged by the words of Jesus (John 12:48). Therefore, regardless of whether our parents are saved or lost, we must be obedient to the Lord. Regardless of where our parents end up eternally, they would encourage us to do the right thing. In Luke 16:27-31 Jesus told of a rich man who died and was in torment. Did he want his family to come and be with him? No. He asked that Lazarus be sent back from the grave to warn them. Even if our parents are lost, they would want us to be saved by doing the right things instead of following them in the wrong things.