Caleb, the son of Hezron, the son of Perez, the son of Judah, was one man in the royal tribe of Israel, but he had many children of a number of mothers who were his wives and concubines. This kind of family complexity was never endorsed by God as his highest plan for family life (See Genesis 2 and Matthew 19:3-15). Nonetheless, the Lord used all kinds of less than ideal events (remember the story of Judah and Tamar) to build up the tribe that would lead to the Messiah. Our relationship with Jesus, the Savior of the world, who is our perfect husband, is our glory.
Beloved, be loved by the Father, the Son, and the Holy Spirit, and then love all image bearers of our king, even though they may be the brothers of another mother.
Finally, be sanctified by God’s Word and Spirit, dedicating yourself to holy living in marriage and singleness by the grace that He supplies.