Beyond blood, there’s the ‘true family’ consisting only of those who do the ‘Will of God’.
Firstly, He didn’t give any ‘special preference’ to His own earthly family:
“Then His mother and His brothers arrived, and standing outside they sent word to Him and called Him. A crowd was sitting around Him, and they said to Him, “Behold, Your mother and Your brothers are outside looking for You.” Answering them, He said, “Who are My mother and My brothers?” Looking about at those who were sitting around Him, He said, “Behold My mother and My brothers!” (Mark 3:31 – 34)
In His words:
“For whoever does the will of God, he is My brother and sister and mother.” – Lord Jesus Christ (Mark 3:35)