Certainly will I pray for your mother and commend her to the protection of God. Did you know, however, that God never sleeps and that his hand is always stretched out over his children in protection, healing and blessing? God is a man of his word and in Psalm 91 he promises us,that we should not be afraid of the terror by night; [nor] of the arrow [that] flieth by day. In verses 10+11, he says, there shall no evil befall us neither shall any plague come nigh our dwelling. For he shall give his angels charge over us to keep us in all our ways.
What must we do to receive this from God? Only that we believe! Remind your mother of this and when she sees the faith in you, her faith will be kindled and God will work.