'Mistress' in the Bible

And she said unto her mistress, Would God my lord were with the prophet that is in Samaria! for he would recover him of his leprosy.

and Jehu hath found the brethren of Ahaziah king of Judah, and saith, 'Who are ye?' and they say, 'Brethren of Ahaziah we are, and we go down to salute the sons of the king, and the sons of the mistress.'