Three things that were true of families in Jesus' time:
The group comes first: In the social world of the early Christians the survival and health of the group took priority over the needs and desires of the individual.
It’s all about family: The extended (patrilineal) family system was the group to which persons in Mediterranean antiquity expressed primary relational allegiance.
I am my brother’s keeper: The closest same generation family bond in the New Testament world was the bond between consanguine siblings.