In God’s family, there are only parents.
Jesus said, “Whosoever putteth away his wife, and marrieth another, committeth adultery, and whosoever marrieth her that is put away from her husband committeth adultery.” (Luke 16:18)
Jesus said, “And if a woman shall put away her husband, and be married to another, she committeth adultery.” (Mark 10:12)
If your family has “step-parents” living in the house then you are not living with your family. Furthermore, you have put your children into a very confusing and possibly dangerous situation! Do not commit adultery against your spouse and children by bringing unrelated people into the family home!